ASE 8 - Engine Performance. Module 11 Powertrain Control Input
|
|
- Whitney Robertson
- 6 years ago
- Views:
Transcription
1 Module 11 Input
2 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to thank all of the people who contributed to the GM ASEP/BSEP curriculum development project This project would not have been possible without the tireless efforts of many people. We acknowledge: The IAGMASEP Association members for agreeing to tackle this large project to create the curriculum for the GM ASEP/BSEP schools. The IAGMASEP Curriculum team for leading the members to a single vision and implementation. Direct contributors within Raytheon Professional Services for their support of translating a good idea into reality. Specifically, we thank: Chris Mason and Vince Williams, for their leadership, guidance, and support. Media and Graphics department under Mary McClain and in particular, Cheryl Squicciarini, Diana Pajewski, Lesley McCowey, Jeremy Pawelek, & Nancy DeSantis. For their help on the Engine curriculum volume, Subject Matter Experts, John Beggs and Stephen Scrivner, for their wealth of knowledge. Finally, we wish to recognize the individual instructors and staffs of the GM ASEP/BSEP Colleges for their contribution for reformatting existing General Motors training material, adding critical technical content and the sharing of their expertise in the GM product. Separate committees worked on each of the eight curriculum areas. For the work on this volume, we thank the members of the Engine committee: Jamie Decato, New Hampshire Community Technical College Lorenza Dickerson, J. Sargeant Reynolds Community College Marvin Johnson, Brookhaven College Jeff Rehkopf, Florida Community College at Jacksonville David Rodriguez, College of Southern Idaho Paul Tucker, Brookdale Community College Kelly Smith, University of Alaska Ray Winiecki, Oklahoma State University - Okmulgee
3 Contents Module 11 Module s Acknowledgements... 2 Introduction... 4 Objectives... 4 General Operation... 5 Signal Types... 6 Circuit Construction... 7 Circuit Operation... 8 PCM Inputs Heated Oxygen Sensor (HO2S) Circuit Intake Air Flow Measurement Ignition Reference Signals A/C System Signal Inputs Power Steering Pressure (PSP) Switch Automatic Transmission Inputs Traction Control Desired Torque Request Theft Deterrent Fuel Enable... 31
4 Introduction NATEF Standards VIII. Engine B. Computerized Engine Controls Diagnosis and Repair 6. Inspect and test computerized engine control system sensors, powertrain control module (PCM), actuators, and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO); perform necessary action. P-1 7. Obtain and interpret scan tool data. P-1 8. Access and use service information to perform step-by-step diagnosis. P-1 STC Standards ALL Competencies for Electrical Stage W B. Automotive Computers 4 Identify types of computer input signals 5 Identify automotive data input sensors 6 Identify cautions to be observed when testing sensors A-8 Competencies for GM Powertrain W/D/H F. PCM Engine Control Management 1 Identify and list the sensors that provide PCM inputs 2 Describe each sensors that provides PCM inputs Objectives Upon successful completion of engine performance module 11, the ASEP student will be able to: Describe sensor signal types Explain sensor circuit construction Explain sensor circuit operation Explain PCM operating parameter operation Verify sensor circuit operation 11-4
5 General Operation In order to make operating decisions, the PCM depends on information from a network of sensors, switches, and other modules located throughout the vehicle. The information from these items is considered inputs to the PCM. Sensors A sensor provides an electrical output that can be calibrated. Information is supplied to the PCM by sensors that monitor the operating environment and vehicle conditions. These sensors include Engine Coolant Temperature sensor, Vehicle Speed sensor, Intake Air Temperature sensor, Throttle Position sensor, and others. The PCM feeds the information provided by the sensors to the microprocessor. The microprocessor then uses this information and the vehicle specific information in the PROM to calculate desired powertrain operation. The electrical outputs from the PCM command devices (fuel injectors, spark timing, canister purge valve, EGR valve, etc.) to change operating conditions. Figure 11-1, PCM Input Parameters (Typical) 11-5
6 Signal Types Sensors can be categorized in a variety of ways. One method is by the type of signal the sensor produces. There are three types of sensor signals. Analog Signal Analog signal have continuously varying voltage. Since the PCM is a digital computer it cannot make calculation with analog information; it must first be converted to digital information. To do this the PCM passes all analog input signals through an analog-to-digital converter (A to D converter) before being sent to the microprocessor. Figure 11-2, Analog Signal Digital Signal Digital signals consist of two conditions, HI and LO. A LO signal is 0 volts and a HI signal can be 5 or 12 volts, depending on the circuit. The microprocessor can use this information directly. Figure 11-3, Digital Signal Time Base Signal Some signals must be correlated with time to have a meaning. The microprocessor has a high-speed clock input for time measurement. Some of the signals that require a time reference are obvious: engine speed (rpm) and vehicle speed (VSS). However, one that is not so obvious is the oxygen sensor. 11-6
7 Circuit Construction Another method of categorizing sensors is by the location of the circuit's source voltage and ground. Circuit voltage and ground can be internal or external to the PCM. The microprocessor determines the state of a sensor input by measuring the input voltage. To understand a PCM circuit you should think of the microprocessor as a voltmeter measuring the sensor input. Schematics in Service Information (esi) show sensor inputs connected to either a voltage source or to a ground; either case, the schematics also show a resistor in the PCM. The voltmeter measures the voltage drop across this resistor. If the sensor input to PCM is connected to the voltage source for the sensor, the PCM reads the voltage source minus the amount that the sensor has reduced the voltage. Pull-Down A "pull down" circuit is provided with a reference voltage signal from the PCM. The power source for the circuit is internal to the PCM and the signal voltage is pulled low by the sensor to an external ground. Figure 11-4, Pull-Down Circuit Pull-Up A "pull-up" or "push-up" circuit has a power source outside the PCM. The PCM does not provide the reference voltage signal. The PCM provides the circuit ground through an internal resistor. Figure 11-5, Pull-Up Circuit 11-7
8 Circuit Operation The final method of categorizing sensors is sensor circuit operation. There are five methods of circuit operation. These five methods are: discrete input, temperature input, position/pressure input, voltage generator, and signal generator. Although each of these circuits provide a voltage signal to the PCM the difference is the kind of information the circuit is providing and how the PCM interprets it. Discrete Input The simplest kind of signal the PCM receives is known as a "switched" input. A switched input is either a HI or LO signal depending on whether the switch is open or closed and whether it is a push-up or a pull-down circuit. In a "pull-down" circuit the power source for the circuit is internal to the PCM. When the switch is closed; signal voltage is pulled low to an external ground. The PCM registers a low voltage reference signal. When the switch is open, the PCM registers a high reference signal. Figure 11-6, Pull-Down Switch Circuit A "pull-up" circuit has a power source outside the PCM. When the switch is closed, external source voltage generates a high reference signal to the PCM. An open switch, on the other hand, generates a low reference signal. Figure 11-7, Pull-Up Switch Circuit 11-8
9 Temperature Input A temperature sensor is an inverse temperature coefficient thermistor. The resistance of the temperature sensor varies predictably with temperature change. At low temperature it has high resistance (100, deg F/C) and at high temperature it has low resistance ( deg F/100 deg C). The PCM supplies a 5 volt reference and ground for the temperature sensor. The sensor input is measured across the resistor at the voltage source. With temperature low, the thermistor's resistance is high and very little current flows through the thermistor; the sensor input close to the reference voltage. When the temperature is high, the thermistor's resistance is lower; most of the reference voltage is dropped across the PCM's internal resistor and the sensor input voltage is about 1.5 to 2 volts. Figure 11-8, Temperature Sensor Circuit 11-9
10 Position/Pressure Input Although a Position sensor and a Pressure sensor are internally constructed differently, both have identical circuits that operate similarly. The three-wire sensor (potentiometer) has a 5 volt reference, a ground circuit back to the PCM and a signal voltage wire. Depending on the position/pressure, the signal voltage at the PCM varies between a low voltage (0.5v) and a high voltage (4.5v). Figure 11-9, Position/Pressure Sensor Circuit 11-10
11 Voltage Generator Voltage generator sensors are sensors that produce a voltage signal. The PCM is looking at the quantity or voltage level of the signal. The PCM usually looks at the voltage with regard to a reference level. The Oxygen sensor is an example of this kind of senor. Figure 11-10, Voltage Generator Circuit 11-11
12 Signal Generator Signal generator sensors are sensors that generate a timed voltage signal. The PCM is looking at the frequency or timing of the signal. The Mass Air Flow sensor is an example of this type of sensor. Figure 11-11, Signal Generator Circuit 11-12
13 PCM Inputs Engine Coolant Temperature (ECT) Sensor The Engine Coolant Temperature sensor, or ECT, is a two-wire sensor. It is threaded into the engine coolant jacket, in direct contact with the engine coolant. The coolant sensor contains a thermistor and provides the PCM with an engine coolant temperature reading. The PCM provides a five-volt signal to the ECT sensor through a dropping resistor. When cold, the sensor provides high resistance, which the PCM detects as a high signal voltage. As the engine warms up, the sensor resistance becomes lower, and the signal voltage drops. Approximate resistance values are shown in the accompanying chart. At normal engine operating temperature, 85 o C Celsius to 105 o C, the signal voltage is in the range of 1.0v to 2.0v. The PCM uses information about coolant temperature to make the necessary calculations for fuel delivery, ignition control, knock sensor system, idle speed, torque converter clutch application, canister purge, exhaust gas recirculation, and cooling fan operation in some applications. Figure 11-12, Engine Coolant Temperature (ECT) Sensor 11-13
14 Intake Air Temperature (IAT) Sensor The Intake Air Temperature sensor, or IAT, is a two-wire sensor positioned in the engine air intake to register the temperature of incoming air. Like the coolant temperature sensor, the IAT sensor is a thermistor device, which provides a varying voltage signal depending on resistance. Its resistance decreases as temperature increases. The PCM supplies a fivevolt signal to the IAT through a dropping resistor. Sensor resistance and the resulting sensor voltage are high when the sensor is cold. As temperature rises, resistance and sensor voltage go down. Air temperature readings are of particular importance during open loop, or cold engine operation. A reading of manifold, or intake air temperature is needed by the PCM to: Adjust the air fuel ratio in accordance with air density Modify spark advance and acceleration enrichment Determine when to enable EGR on some applications. Figure 11-13, IAT Sensor Circuit 11-14
15 Throttle Position (TP) Sensor The Throttle Position, or TP sensor, is a three-wire, variable resistor mounted to the throttle body and operated by the throttle valve shaft. When the throttle is closed, the PCM reads a low voltage signal. When the throttle is wide open, the PCM reads a high voltage signal. The voltage signal changes relative to the throttle position, about 0.5v at idle and about 4.5v at wide open throttle. Information from the T P sensor concerning throttle plate angle is one parameter used by the PCM to calculate fuel delivery, ignition timing, and transmission shifting schedule, EGR, torque converter clutch application, upshift light operation, and the evaporative emission control system. Figure 11-14, Throttle Position Sensor Circuit 11-15
16 Heated Oxygen Sensor (HO2S) Circuit The Heated Oxygen Sensor, or HO2S, is unique among the engine control system sensors because it acts like a battery and is able to generate its own low voltage signal. It is located in the exhaust system and monitors the amount of oxygen in the exhaust stream. It provides feedback to the PCM, which uses this information to manage fuel delivery. The electrically heated oxygen sensor warms up quickly and remains hot, even at idle when the exhaust manifold may cool down. Construction The HO2S has a center element made of a ceramic material called Zirconia. There are two platinum electrodes, which make up the inner and outer surfaces of the center element. The inner surface of the sensor is exposed to outside air. This surface forms the positive terminal of the HO2S circuit. The platinum coating on the outside of the sensor element is exposed to exhaust gases. The gases heat up the HO2S and keep it at the correct operating temperature of 600 degrees Fahrenheit. The outer surface forms the negative terminal of the sensor circuit. The HO2S generates an electrical signal as the result of the interaction of outside air, the inner surface of the element, exhaust gases, and the outer surface of the element. Figure 11-15, Oxygen Sensor 11-16
17 Operation The PCM applies a reference voltage, also known as bias voltage, of 450 mv to the HO2S. The PCM compares this reference voltage with the voltage generated by the HO2S. The amount of voltage the HO2S generates is proportionate to the difference between the amount of oxygen in the outside air and in the exhaust gases. The atmosphere contains about 21% oxygen. The exhaust from a rich air fuel ratio contains almost no oxygen. With a large difference between the amounts of oxygen contacting the two surfaces, the sensor is able to generate more voltage. When the exhaust gas is rich, below 14.7:1, the voltage output is high, above 450 mv. Figure 11-16, Different Oxygen Levels The exhaust with a lean air fuel ratio has about 2% oxygen. With a smaller difference between the amounts of oxygen on the two surfaces, the sensor generates less voltage. When the exhaust gas is lean, above 14.7:1, air fuel ratio, the sensor's voltage output is low, below 450 mv. In either case, the PCM reads the difference and adjusts injector operation to make the air fuel ratio richer or leaner as required
18 In a normally operating engine, the HO2S output voltage constantly fluctuates up and down between 100 mv and 900 mv. This fluctuation reflects the changes in the air fuel ratio. The PCM adjusts injector pulse width in response to the changing HO2S signals. This data is used to determine short term and long term fuel trim. Figure 11-17, HO2S Voltages HO2S output voltage constantly fluctuates up and down and is used for: Adjusting injector operation Determining short term and long term fuel trim Open loop/closed loop criteria EGR diagnostics Monitoring catalyst efficiency Secondary air and EVAP diagnostics 11-18
19 Intake Air Flow Measurement There are two methods of sensing incoming engine air flow: speed density and mass air flow. The PCM uses intake air flow measurement information for: Barometric pressure readings Fuel delivery (enrichment, enleanment, fuel cut-off) Spark calculations Diagnostics Speed Density Speed Density is a system of measuring intake air flow by sensing changes in intake manifold pressures which result form engine load and speed changes. The PCM uses a MAP sensor to read manifold absolute pressure. The PCM combines MAP along with temperature, RPM, estimates of volumetric efficiency an EGR to calculate mass air flow. As manifold pressure increases, air density increases as well and additional fuel is required. The PCM increases injector pulse width to meet this requirement based on a "calculated" air flow. Figure 11-18, Map Sensor, Speed Density System 11-19
20 Manifold Absolute Pressure (MAP) Sensor The Manifold Absolute Pressure (MAP) sensor is a three wire sensor located in the engine compartment. The MAP sensor measures changes in intake manifold air pressure. MAP is low when vacuum is high, and MAP is high when vacuum is low. When the engine is not running, the manifold is at atmospheric pressure, and the MAP sensor is registering barometric, or BARO, pressure. BARO readings are used for fuel delivery calculations at start up, and fuel and spark calculations when the engine is running. The PCM updates its BARO reading when the ignition is turned on and when the throttle is wide open. The MAP sensor currently being used on GM vehicles is a Strain Gauge type. This sensor contains a silicon chip, approximately three millimeters square. It is placed in a sealed housing, which is connected to the manifold. A fixed pressure is sealed above the silicon chip with manifold pressure below it. When the engine is running and manifold vacuum is created, the pressure below the chip drops, creating a change in resistance. During operation, constantly varying vacuum from the intake manifold is applied to the sensor housing. Any change in applied vacuum causes a corresponding change in the sensor's resistance. Electrically, when manifold pressure is low, the sensor voltage is low. When manifold pressure is high, sensor voltage is high. Figure 11-19, MAP Sensor Circuit 11-20
21 Mass Air Flow A Mass Air Flow (MAF) sensor is positioned in the intake air duct or manifold. It measures the volume and density of the incoming air. The MAF sensor is able to take the temperature, density, and humidity of the air into account. All of these variables together determine the mass of the incoming air. The PCM reads actual mass airflow to calculate fuel requirements. Mass Air Flow (MAF) Sensor GM has used several types of MAF sensors. All use the same operating principle: the resistance of a conductor varies with temperature. In the case of the MAF sensor, the conductor is maintained at a constant calibrated temperature. As a greater volume of air passes the heated conductor, the passing air carries heat away. More current is required to maintain the constant temperature of the conductor. In a similar manner, if the air is more humid, denser, or cooler, it will absorb more heat from the sensor, requiring more current to maintain the temperature of the sensor. This current then translates into a voltage signal, telling the PCM how much airflow there is, so that the PCM can make fuel delivery and spark timing calculations. Figure 11-20, Hot Wire Mass Air Flow Sensor Circuit 11-21
22 Ignition Reference Signals Distributor Ignition (DI) or Electronic Ignition (EI) reference signals are an indication from the ignition system of engine speed. These signals are sent on the reference circuit from the ignition module to the PCM. On engines with an HEI distributor, the DI module receives signals from the pickup coil assembly in the distributor and sends them on to the PCM on the RPM reference wire. On distributorless engines, the ignition module receives signals from the crankshaft position sensor located either in the engine block or on the front of the engine, depending on application. This signal is then sent to the PCM as a 5-volt digital signal. The PCM requires ignition reference pulses in order to control: Spark timing Triggering and synchronization of fuel injectors Idle Air Control (IAC) valve operation Fuel pump relay EGR Canister purge (EVAP) Figure 11-21, Ignition Reference Circuit 11-22
23 Crankshaft Position Sensor The crankshaft position sensor (CKP), is the most critical input for the ignition system. It identifies cylinder pairs at top-dead-center. The PCM uses the camshaft (CMP), sensor to identify which cylinder is on the compression stroke and which is on exhaust. Camshaft Position Sensor While the CKP sensor identifies cylinder pairs at top dead center, the CMP sensor identifies cylinder stroke. The CMP sends a signal to the PCM, which uses it as a sync pulse to trigger the injectors in proper sequence. The PCM uses the CMP signal to indicate the position of the number one piston during its intake stroke. This allows the PCM to synchronize the ignition system and calculate true Sequential Fuel Injection (SFI). Figure 11-22, 4.3L Ignition System 11-23
24 Vehicle Speed Sensor (VSS) The vehicle speed sensor (VSS), provides vehicle speed information to the PCM. The PCM needs information about vehicle speed to operate: The idle air control valve Canister purge Torque converter clutch Cruise control Transmission shift solenoids Electric cooling fans. The magnetic VSS consists of a permanent magnet generator, which produces an AC voltage whenever vehicle speed is over three miles per hour. The AC voltage level and the number of pulses increase with vehicle speed. Since the VSS output is AC voltage, which cannot be directly used by digital electronic components like the PCM, the AC voltage is converted into a digital signal by the VSS buffer. Figure 11-23, Magnetic VSS Buffer Amplifies 11-24
25 Knock Sensor System The Knock Sensor system allows the PCM to control ignition timing for the best possible performance while protecting it from potentially damaging detonation. The Knock Sensor is used to detect engine detonation, or knock, and signal the PCM to retard ignition timing. The PCM supplies a five-volt reference signal to the knock sensor through a dropping resistor. Since the knock sensors have internal resistance, a voltage drop is created and read by the PCM to determine if the circuit is open, shorted to ground, or shorted to voltage. The Knock Sensor sends the PCM an AC voltage signal when detonation occurs. The PCM processes the signal and modifies the ignition timing to control knock. When the Knock Sensor signal stops, the PCM begins to return the ignition timing in two to four degree increments back to normal IC advance. The Knock Sensor allows the PCM to advance ignition timing as much as possible for the best performance and fuel economy. But perhaps more important, the Knock Sensor controls ignition timing to protect the engine when low octane fuel is being used. High engine temperatures and potentially damaging detonation are more likely with the use of low octane fuel. On some systems, the Knock Sensor system has a built-in self-test mode. Once per engine start-up, during certain engine conditions, the ignition is advanced intentionally to induce a knock, which the Knock Sensor should detect. This self-test is bypassed if a knock occurs and is detected before the conditions are met to run the self-test. Figure 11-24, Integrated KS System 11-25
26 Fuel Tank Pressure Sensor The fuel tank pressure sensor is used to detect leaks in the evaporative emissions system. The sensor is a three-wire strain gauge sensor, much like the common MAP sensor. However, this sensor measures the difference between the air pressure, or vacuum, in the fuel tank and the outside air. The fuel tank pressure sensor mounts at the top of the fuel tank sending unit and alters the reference voltage to create a signal voltage. The sensor's seal at the sending unit is critical and should be inspected whenever the sensor is removed or serviced. Ceramic Resistor Card Fuel Level Sensor Beginning with some 1996 Enhanced EVAP equipped models, the fuel level sending unit was switched from a wire wound 0-90 ohm potentiometer to a ceramic card resistor ohm potentiometer. The improved resolution improves fuel level sensing accuracy, needed when the PCM performs on-board diagnostic tests. The ceramic card assembly consists of a: Ceramic card Wiper arm Float arm assembly Wire harness assembly. Figure 11-25, Ceramic Resistor Card Fuel Sensor The sensor is used to convert changes in the fuel tank level to a variable electrical signal used to drive a gauge in the instrument cluster. The ceramic resistor card fuel level sensor attaches to the outside surface of the modular fuel sender assembly. An electrical harness attached to the fuel sender cover connects the ceramic resistor card to the vehicle wiring harness. Power to the sensor is received from the PCM. The float and float arm assembly work in conjunction with the resistor to measure fuel level. A full tank of fuel forces the float to the top position. With little or no fuel, the float moves to the bottom of the tank. The function of the ceramic resistor card is to vary the resistance of the signal from the PCM, depending on the position of the float. The resistance signal is determined by the wiper contact's position on the conductive bars of the ceramic resistor card. The fuel gauge converts the PCM signal into the fuel level reading on the instrument panel
27 A/C System Signal Inputs There is no specific sensor for the Air Conditioning (A/C) request. Instead, the input comes to the PCM from the A/C control head on the instrument panel. When the A/C system is turned on, the A/C compressor puts a sudden load on the engine. This could lead to driveability problems such as stalling, especially at idle. To prevent this, the A/C switch does not control the A/C compressor directly. Instead, the switch sends an A/C request to the PCM. Depending on the engine control system and engine operating conditions, the PCM does a number of things: Including delaying A/C clutch engagement after A/C is requested Adjusting idle RPM to compensate for the extra load Disengaging the A/C clutch during wide-open throttle operation. There are a number of other A/C system switches that must be closed for this to happen. These may include a high-pressure switch and or a lowpressure switch. These switches may be in series with the A/C request, or separate inputs to the PCM. Figure 11-26, A/C Systems Inputs 11-27
28 The PCM can have two additional inputs regarding the A/C system: The Refrigerant pressure sensor, and Evaporator temperature sensor. The A/C refrigerant pressure sensor is a three-wire sensor that responds to changes in system high side pressure. The PCM supplies a five-volt reference and ground. A signal circuit is monitored by the PCM. On most systems, the PCM uses the pressure sensor signal to identify a resulting pressure increase after the PCM has commanded the A/C compressor clutch to engage. On some other systems, this pressure signal is also used to determine IAC valve position for idle speed control. The evaporator temperature sensor, also a three-wire sensor, is used by the PCM to cycle the A/C clutch for optimum cooling. Additionally, the PCM can help prevent evaporator freeze-up by disabling the A/C clutch
29 Power Steering Pressure (PSP) Switch The Power Steering Pressure (PSP), switch is a two-wire, ON/OFF switch, located in the power steering fluid pressure line. It is used to detect high system pressure. The PCM uses this information for: IAC control Spark retard during idle for improved idle stability A/C compressor control. During low vehicle speed operation the power steering system pressure may be high. The added load of the power steering pump could cause the engine to stall. The power steering pressure switch can be either normally open or closed, depending on design. When the calibrated pressure is reached, sensor circuit voltage switches. In response to this signal, the PCM operates the idle air control to increase engine speed slightly. If the vehicle is equipped with air conditioning, the PCM may also turn "OFF" the compressor clutch relay when the PSP switch indicates high pressure. Figure 11-27, Power Steering Pressure (PSP) Switch 11-29
30 Automatic Transmission Inputs Electronically controlled transmission gear switches are ON/OFF switches, controlled inside the transmission transaxle. Some switches are normally open when the gear is not engaged, and closed when the corresponding gear is engaged. Other switches are normally closed when the gear is not engaged and open when the gear is engaged. Electronically controlled transmissions and transaxles have a Fluid Pressure Switch Assembly (PSA) mounted in the valve body. There are five separate switches that respond to manual valve position. As the switches in the PSA are exposed to the various fluid pressures of the different gear ranges, different switch ON/OFF combinations occur. Three circuits are monitored by the PCM; the different combinations inform the PCM which PRNDL range has been selected, based upon the manual valve position. Figure 11-28, Fluid Pressure Switch Assembly The Transmission Fluid Temperature (TFT) Sensor is either mounted in the PSA or is part of the harness. It is a thermistor, similar to the other temperature sensors used for engine management, which is submersed in the transmission fluid. The TFT sensor's resistance alters the five-volt reference signal sent by the PCM, which uses this signal to help control TCC apply and to control line pressure. At higher temperatures, the PCM can command TCC apply to reduce the temperatures generated by the converter's fluid coupling
31 Traction Control Desired Torque Request On vehicles with traction control, there is constant communication between the Electronic Brake Traction Control Module (EBTCM) and the PCM. The traction control desired torque request is a pwm signal that ranges from 0-100%. The EBTCM reduces the pulse width of the traction control desired torque request when a drive wheel slippage situation is detected. The PCM monitors the traction control desired torque request. If a signal of less than 100% is seen, the PCM, depending on vehicle application, reduces wheel slippage by: Retarding spark timing Closing the throttle Decreasing the boost solenoid pwm Disabling fuel injectors Theft Deterrent Fuel Enable The Theft Deterrent Fuel Enable signal is an input from the Vehicle Theft Deterrent Module. It signals the PCM to enable the fuel injectors. If the Vehicle Theft Deterrent Control Module does not send the correct Theft Deterrent Fuel Enable signal to the PCM, the fuel system may be disabled. On some vehicles, this signal is a direct input to the PCM. Other applications use Class 2 serial data to transmit this message
ASE 8 - Engine Performance. Module 10 Powertrain Control Module Processing
Module 10 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to thank all of
More informationASE 5 - Brakes. Module 5 Balance Control Systems
ASE 5 - Brakes Module 5 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to
More informationASE 6 - Electrical Electronic Systems. Module 2 Electrical Symbols
Electronic Systems Module 2 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish
More informationDiagnostic Trouble Code (DTC) List - Vehicle
Document ID# 850406 2002 Pontiac Firebird Diagnostic Trouble Code (DTC) List - Vehicle DTC DTC 021 and/or 031 DTC 022 and/or 032 DTC 023 or 033 DTC 24/34 DTC 025 and/or 035 DTC 041 DTC 042 DTC 043 DTC
More informationASE 5 - Brakes. Module 2 Power Brake Boosters
ASE 5 - Brakes Module 2 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to
More informationASE 6 - Electrical Electronic Systems. Module 16 Lighting Systems
Electronic Systems Module 16 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish
More informationELECTRONIC ENGINE CONTROLS
2005 Jaguar S-Type (X200) V8-4.2L Vehicle > Powertrain Management > Computers and Control Systems > Description and Operation > Components ELECTRONIC ENGINE CONTROLS Electronic Engine Controls Vehicles
More informationFuel Metering System Component Description
1999 Chevrolet/Geo Tahoe - 4WD Fuel Metering System Component Description Purpose The function of the fuel metering system is to deliver the correct amount of fuel to the engine under all operating conditions.
More informationDiagnostic Trouble Codes (continued) GM Specific Codes
85 GM Specific Codes P11XX Fuel and Air Metering P1106 MAP Sensor Circuit Intermittent High Voltage P1107 MAP Sensor Circuit Intermittent Low Voltage P1108 BARO to MAP Signal Comparison Too High P1111
More informationASE 7 - Heating, Ventilation, & Air Conditioning. Module 7 Retrofitting
ASE 7 - Heating, Ventilation, & Air Conditioning Module 7 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's
More informationMotronic September 1998
The Motronic 1.8 engine management system was introduced with the 1992 Volvo 960. The primary difference between this Motronic system and the previous generation of Volvo LH-Jetronic engine management
More informationSYTY Trouble Code: ALDL INFORMATION
SYTY Trouble Code: ALDL INFORMATION A -- Ground G -- Fuel Pump B -- Diagnostic Terminal H -- Brake Sense Speed Input F -- TCC M -- Serial Data (special tool needed - Do Not Use) For ECM Trouble Codes,
More informationElectronics III Sensors
Electronics III Sensors Matthew Whitten Brookhaven College Sensor Defined. A device that responds to a stimulus, such as heat, light, or pressure, and generates a signal that can be measured or interpreted.
More informationASE 8 - Engine Performance. Module 14 On-Board Diagnostics II
Module 14 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to thank all of
More informationPowertrain DTC Summaries EOBD
Powertrain DTC Summaries Quick Reference Diagnostic Guide Jaguar X-TYPE 2.0 L 2002.25 Model Year Refer to page 2 for important information regarding the use of Powertrain DTC Summaries. Jaguar X-TYPE 2.0
More informationASE 7 - Heating, Ventilation, & Air Conditioning. Module 3 AC Controls
ASE 7 - Heating, Ventilation, & Air Conditioning Module 3 AC Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for
More informationElectronics III Sensors
Electronics III Sensors Matthew Whitten Brookhaven College Sensor Defined. A device that responds to a stimulus, such as heat, light, or pressure, and generates a signal that can be measured or interpreted.
More informationPowertrain DTC Summaries EOBD
Powertrain DTC Summaries Quick Reference Diagnostic Guide Jaguar S-TYPE V6, V8 N/A and V8 SC 2002.5 Model Year Refer to pages 2 9 for important information regarding the use of Powertrain DTC Summaries.
More informationASE 8 - Engine Performance. Module 8 Ignition Systems Triggering
Module 8 Ignition Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to thank
More informationGM Enhanced Parameters
GM Enhanced Parameters # of 4x Ref Pulses between CAM Counter # OF EGR ADAPTIVE LEARN MATRIX CELLS OUT OF RANGE High # OF EGR ADAPTIVE LEARN MATRIX CELLS OUT OF RANGE LOW 1-2 Adapt High Cell 1-2 Adapt
More informationENGINE 01 02A 1. Toc of SCT ON-BOARD DIAGNOSTIC [ENGINE. Toc of SCT 01 02A ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)] 01 02A
ENGINE 01 SECTION Toc of SCT ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)]...01-02A ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]...01-02B ON-BOARD DIAGNOSTIC [CRUISE CONTROL SYSTEM].......01-02C
More informationFig.11 Powertrain Control Module (PCM)
2003 Dodge or Ram Truck Caravan V6-3.3L VIN R Vehicle > Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module >
More informationTelephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: Name: Manufacturer: Ford Address: Model: Year: 1994 Registration: Tel - Private: Tel - Business: Mileage: Job number: Terminal side Wire side Component/circuit description
More information01 02B ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)] CONTROL SYSTEM WIRING DIAGRAM [FS]............................ 2 CONTROL SYSTEM DEVICE AND CONTROL RELATIONSHIP CHART [FS]........ 4 Engine Control System............
More informationPowertrain DTC Summaries OBD II
Powertrain DTC Summaries Quick Reference Diagnostic Guide Jaguar X-TYPE 2.5L and 3.0L 2002 Model Year Revised January, 2002: P0706, P0731, P0732, P0733, P0734, P0735, P0740, P1780 POSSIBLE CAUSES Revised
More informationTransmission Electronic Control System
SECTION 307-01: Automatic Transaxle/Transmission 5R55S 2009 Mustang Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 05/23/2008 Transmission Electronic Control System Electronic System
More informationE - THEORY/OPERATION - TURBO
E - THEORY/OPERATION - TURBO 1995 Volvo 850 1995 ENGINE PERFORMANCE Volvo - Theory & Operation 850 - Turbo INTRODUCTION This article covers basic description and operation of engine performance-related
More informationTelephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: Terminal side Wire side Component/circuit description ECM pin Signal Condition Typical value Oscilloscope setting (Suggested settings - Voltage/time per division)
More informationE - THEORY/OPERATION ENGINE PERFORMANCE General Motors Corp. - Theory & Operation - 5.7L
E - THEORY/OPERATION 1998 ENGINE PERFORMANCE General Motors Corp. - Theory & Operation - 5.7L INTRODUCTION This article covers basic description and operation of engine performance-related systems and
More informationFUEL INJECTION SYSTEM - MULTI-POINT
FUEL INJECTION SYSTEM - MULTI-POINT 1988 Jeep Cherokee 1988 Electronic Fuel Injection JEEP MULTI-POINT 4.0L Cherokee, Comanche, Wagoneer DESCRIPTION The Multi-Point Electronic Fuel Injection (EFI) system
More informationLotus Service Notes Section EMR
ENGINE MANAGEMENT SECTION EMR Lotus Techcentre Sub-Section Page Diagnostic Trouble Code List EMR.1 3 Component Function EMR.2 7 Component Location EMR.3 9 Diagnostic Guide EMR.4 11 CAN Bus Diagnostics;
More informationLotus Service Notes Section EMD
ENGINE MANAGEMENT SECTION EMD Lotus Techcentre Sub-Section Page Diagnostic Trouble Code List EMD.1 3 Component Function EMD.2 8 Component Location EMD.3 10 Diagnostic Guide EMD.4 11 CAN Bus Diagnostics;
More informationDiagnostic Trouble Code (DTC) table
Page 1 of 40 01-19 Diagnostic Trouble Code (DTC) table Note: When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in DTC memory with a description of the
More information4.0L CEC SYSTEM Jeep Cherokee DESCRIPTION OPERATION FUEL CONTROL DATA SENSORS & SWITCHES
4.0L CEC SYSTEM 1988 Jeep Cherokee 1988 COMPUTERIZED ENGINE Controls ENGINE CONTROL SYSTEM JEEP 4.0L MPFI 6-CYLINDER Cherokee, Comanche & Wagoneer DESCRIPTION The 4.0L engine control system controls engine
More informationPowertrain DTC Summaries EOBD
Powertrain DTC Summaries Quick Reference Diagnostic Guide Jaguar X-TYPE 2.5L and 3.0L 2001.5 Model Year Revised January, 2002: P0706, P0731, P0732, P0733, P0734, P0735, P0740, P1780 POSSIBLE CAUSES Revised
More informationDiagnostic Trouble Code (DTC) memory, checking and erasing
Page 1 of 49 01-12 Diagnostic Trouble Code (DTC) memory, checking and erasing Check DTC Memory (function 02) - Connect VAS5051 tester Page 01-7 and select vehicle system "01 - Engine electronics". Engine
More informationASE 8 - Engine Performance. Module 9 Ignition Systems
ASE 8 - Engine Module 9 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to
More informationFor Troubleshooting of DTC related components, see chart on page INTAKE AIR BYPASS (IAB) HIGH CONTROL SOLENOID
Index For Troubleshooting of DTC related components, see chart on page 11-53. '96-99 models: EXHAUST GAS RECIRCULATION (EGR) and LIFT MANIFOLD ABSOLUTE PRESSURE (MAP) INTAKE AIR BYPASS (IAB) HIGH page
More informationZoom and Print Options
Vehicle» Engine, Cooling and Exhaust» Engine» Service and Repair» Removal and Replacement» Engine Replacement Engine Replacement ^ Tools Required - J 38185 Hose Clamp Pliers Removal Procedure 1. Remove
More informationATASA 5 th. Detailed Diagnosis & Sensors. Please Read The Summary
ATASA 5 TH Study Guide Chapter 26 Pages 764 809 51 Points Please Read The Summary 1. Many different sensors are involved in the overall driveability of a vehicle. Input Processing Output Electronic Engine
More informationAuto Diagnosis Test #7 Review
Auto Diagnosis Test #7 Review Your own hand written notes may be used for the 1 st 10 minutes of the test Based on Chapters 25, 26, 32, 33, 34 and Lab Demonstrations Auto Diagnosis Test #7 Review Your
More informationDiagnostic Trouble Codes (continued) SAE Defined Codes
78 SAE Defined Codes P01XX Fuel and Air Metering P0100 Mass or Volume Airflow Circuit Problem P0101 Mass or Volume Airflow Circuit Range or Performance Problem P0102 Mass or Volume Airflow Circuit Low
More informationcylinder cars / trucks (except Saturn S-series cars) ENGINE DIAGNOSTIC PARAMETERS
2001 4-cylinder cars / trucks (except Saturn S-series cars) ENGINE DIAGNOSTIC S SECONDARY S AND Manifold Pressure/Throttle Position Sensor Manifold Pressure/Throttle Position Sensor Manifold Pressure Too
More informationASE 8 - Engine Performance. Module 3 Emission Control Systems
Module 3 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish to thank all of
More informationService Bulletin. DTC Detection Item Associated Monitor
Service Bulletin 03-010 Applies To: All OBD II equipped models except SLX March 29, 2003 OBD II DTCs and Their Associated Monitors This is a list of all DTCs for all OBD II models. No one model has all
More informationASE 6 - Electrical Electronic Systems. Module 14 Charging System
Electronic Systems Module 14 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish
More informationFuel control. The fuel injection system tasks. Starting fuel pump (FP)
1 Fuel control The fuel injection system tasks - To provide fuel - To distribute the fuel between the cylinders - To provide the correct quantity of fuel Starting fuel pump (FP) The control module (1)
More informationThe PCM is the on-board computer which receives input from various sensors and, with this information, controls various engine & emissions control
The PCM is the on-board computer which receives input from various sensors and, with this information, controls various engine & emissions control actuators. The PCM has various memories within it. These
More informationASE 8 - Engine Performance. Module 13 Management System Diagnostics
Module 13 Management System Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's Service Technical College wish
More information5. Control System CONTROL SYSTEM FUEL INJECTION (FUEL SYSTEM) A: GENERAL FU(H4DOTC)-29
W1860BE.book Page 29 Tuesday, January 28, 2003 11:01 PM 5. Control System A: GENERAL The ECM receives signals from various sensors, switches, and other control modules. Using these signals, it determines
More informationError codes Diagnostic plug Read-out Reset Signal Error codes
Error codes Diagnostic plug Diagnostic plug: 1 = Datalink LED tester (FEN) 3 = activation error codes (TEN) 4 = positive battery terminal (+B) 5 = ground Read-out -Connect LED tester to positive battery
More informationFive-digit error code First position: P - is for powertrain codes B - is for body codes C - is for chassis codes
https://www.automotive-manuals.net Five-digit error code First position: P - is for powertrain codes B - is for body codes C - is for chassis codes The second position: 0 - the total for the OBD-II code
More informationDTC P0171, P0172, P0174, or P0175
Page 1 of 6 2009 Pontiac G8 G8 Service Manual Document ID: 2076050 DTC P0171, P0172, P0174, or P0175 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic
More informationASE 7 - Heating, Ventilation & Air Conditioning. Module 5 Automatic HVAC Systems
ASE 7 - Heating, Ventilation & Air Conditioning Module 5 Acknowledgements General Motors, the IAGMASEP Association Board of Directors, and Raytheon Professional Services, GM's training partner for GM's
More informationP0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
*** Not all codes apply to all vehicles *** P0100 Mass or Volume Air Flow Circuit Malfunction P0101 Mass or Volume Air Flow Circuit Range/Performance Problem P0101 Mass or Volume Air Flow Circuit Low Input
More informationVerified Fix #1 Tool Data Diagnostic Trouble Code Information Report Customer #1 VIN: JT8BL69SX4G015327 Customer Name: Year: 2004 Customer Phone#: 123-123-1234 Make: Lexus Report#: 162 Model: GS 430 Date
More informationDisconnect the breather tube from the air cleaner outlet duct.
Disconnect the breather tube from the air cleaner outlet duct. Disconnect the IAT sensor harness connector. Remove the air cleaner outlet duct retaining wingnut. Separate the air cleaner outlet duct from
More information2002 Buick Rendezvous - AWD
2002 Buick Rendezvous - AWD DTC P0410 Description The control module activates the secondary air injection (AIR) system by grounding both the pump relay and the vacuum control solenoid control circuits.
More informationNATEF ENGINE PERFORMANCE CHECKLIST Name Date Period
NATEF ENGINE PERFORMANCE CHECKLIST Name Period For every task in Engine Performance the following safety requirement must be strictly enforced: Comply with personal and environmental safety practices associated
More informationDTC P0174 Fuel Trim System Lean Bank 2
2000 Chevrolet/Geo S10 Pickup - 4WD DTC P0174 Fuel Trim System Lean Bank 2 Circuit Description In order to provide the best possible combination of driveability, fuel economy, and emission control, the
More informationSECONDARY PARAMETERS AND ENABLE CONDITIONS
SECONDARY S AND Manifold Pressure Sensor Rationality Manifold Pressure Too Low Manifold Pressure Too High Intake Air Temperature Sensor Shorted Intake Air Temperature Sensor Open Coolant Temperature Sensor
More informationVOLKS CITY BEECH AVENUE CATTEDOWN PLYMOUTH PL4 0QQ
VOLKS CITY BEECH AVENUE CATTEDOWN PLYMOUTH PL4 0QQ Telephone: 01752 667007 Fax: 01752 663399 Email: mail@volkscity.com 1 Camshaft position (CMP) sensor 1 2 Camshaft position (CMP) sensor 2 3 Camshaft position
More informationI - SYSTEM/COMPONENT TESTS - TURBO
I - SYSTEM/COMPONENT TESTS - TURBO 1995 Volvo 850 1995 ENGINE PERFORMANCE Volvo - System & Component Testing 850 - Turbo INTRODUCTION In this article, Engine Control Module (ECM) may also be referred to
More informationLotus Service Notes Section EMQ
ENGINE MANAGEMENT SECTION EMQ Lotus Techcentre Sub-Section Page Cylinder Numbering 2 Component Function EMQ.1 3 Component Location EMQ.2 5 Diagnostic Trouble Code List EMQ.3 7 Diagnostic Guide EMQ.4 11
More informationDiagnostic Trouble Codes (continued) Ford Specific Codes
92 Ford Specific Codes P11XX Fuel and Air Metering P1000 OBD-II Monitor Drive Cycle Not Completed P1001 KOER Self-Test Not Completed, Test Aborted P1100 Mass Airflow MAF Sensor Intermittent P1101 Mass
More information1998 ENGINE PERFORMANCE. General Motors Corp. - Basic Diagnostic Procedures - 5.7L
INTRODUCTION 1998 ENGINE PERFORMANCE General Motors Corp. - Basic Diagnostic Procedures - 5.7L The following diagnostic steps will help prevent overlooking a simple problem. This is also where to begin
More informationPowertrain Control Module Connector C1 End View
1999 Grand Prix Applies to: 3.8L Report a problem with this article Table 1: Powertrain Control Module Connector C1 End View Table 2: Powertrain Control Module Connector C2 End View Powertrain Control
More informationShort to Ground High Resistance Open P0132, P0131, P0132, P0133, P0134, P0131, P0132, P0133, P0134, P0137, P0140, P0151, P0152,
Page 1 of 7 2008 Pontiac G8 DTC P0140,, P2270, or P2271 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for
More information7. Remove the starter motor. Refer to Starter Motor Replacement (2.2L) or Starter Motor Replacement (4.3L).
1 of 9 1/5/2013 6:40 PM Removal Procedure 1. Disconnect the battery negative cable. Refer to Battery Replacement. 2. Remove the hood. Refer to Hood Replacement. 3. If the vehicle is equipped with a manual
More informationC6 Corvette DIC Codes
C6 Corvette DIC Codes B0159 Outside Air Temp Sensor B2910 Steering Column Lock Password Incorrect B0164 Pass Compartment Temp Sensor B2981 Right Front Door Handle Switch B0174 Output Air Temp Sensor 1
More informationTruck and Transport IP Red Seal Practice Exam PRACTICE EXAM 4
Truck and Transport IP Red Seal Practice Exam PRACTICE EXAM 4 1. Which of these sensors directly measures engine load? a. Manifold absolute pressure sensor. b. Coolant sensor (ECT). c. Vehicle speed sensor.
More informationLotus Service Notes Section EMQ
ENGINE MANAGEMENT SECTION EMQ Lotus Techcentre Sub-Section Page Component Function EMQ.1 3 Component Location EMQ.2 5 Diagnostic Trouble Code List EMQ.3 7 Diagnostic Guide EMQ.4 11 CAN Bus Diagnostics;
More informationFord Gasoline Programmer. Reprogram. Power
Performance PROGRAMMER Ford Gasoline Programmer 4 Reprogram Power INSTALLATION INSTRUCTIONS OVERVIEW Your vehicle has an onboard computer that controls the engine and transmission. The JET programmer reprograms
More informationIgnition control. The ignition system tasks. How is the ignition coil charge time and the ignition setting regulated?
1 Ignition control The ignition system tasks To transform the system voltage (approximately 14 V) to a sufficiently high ignition voltage. In electronic systems this is normally above 30 kv (30 000 V).
More informationMULTIPOINT FUEL INJECTION (MPI) <4G63-Non-Turbo>
13A-1 GROUP 13A MULTIPOINT FUEL INJECTI (MPI) CTENTS GENERAL INFORMATI........ 13A-2 FUEL INJECTI CTROL...... 13A-6 IDLE SPEED CTROL (ISC)..... 13A-7 IGNITI TIMING AND DISTRIBUTI CTROL........
More information5. Control System CONTROL SYSTEM FUEL INJECTION (FUEL SYSTEM) A: GENERAL. FU(STi)-27
W1860BE.book Page 27 Tuesday, January 28, 2003 11:01 PM 5. Control System A: GENERAL The ECM receives signals from various sensors, switches, and other control modules. Using these signals, it determines
More informationMULTIPOINT FUEL INJECTION (MPI) <4G9>
MULTIPOINT FUEL INJECTION (MPI) 13C-1 MULTIPOINT FUEL INJECTION (MPI) CONTENTS GENERAL................................. 2 Outline of Changes............................ 2 GENERAL INFORMATION...................
More information2012 Chevy Truck Equinox FWD L4-2.4L Vehicle > Locations > Components
2012 Chevy Truck Equinox FWD L4-2.4L Vehicle > Locations > Components 2012 Chevy Truck Equinox FWD L4-2.4L Vehicle > Powertrain Management > Fuel Delivery and Air Induction > Description and Operation
More informationMULTIPOINT FUEL INJECTION (MPI) <4G63-Turbo>
13B-1 GROUP 13B MULTIPOINT FUEL INJECTI (MPI) CTENTS GENERAL INFORMATI........ 13B-2 SENSOR....................... 13B-8 THROTTLE VALVE OPENING ANGLE CTROL.............. 13B-9 FUEL INJECTI
More informationLower Intake Manifold Replacement
Lower Intake Manifold Replacement Removal Procedure 1. Turn OFF all the lamps and the accessories. 2. Ensure the ignition switch is in the OFF position. 3. Disconnect the negative battery cable from the
More informationC5 Corvette IPC Diagnostic Display Mode
C5 Corvette IPC Diagnostic Display Mode The IPC display, the 20-character, vacuum florescent screen above the steering column that says "Corvette by Chevrolet" every time you turn on the key is a powerful
More informationOBD-II Diagnostic Powertrain (P) Trouble Codes
OBD-II Diagnostic Powertrain (P) Trouble Codes Please use our new & improved search engine to find information on your trouble codes. Search Now! This list contains standard diagnostic trouble codes (DTC
More informationMULTIPORT FUEL SYSTEM (MFI) <2.4L ENGINE>
13B-1 GROUP 13B MULTIPORT FUEL SYSTEM (MFI) CONTENTS GENERAL DESCRIPTION 13B-2 CONTROL UNIT 13B-5 SENSOR 13B-7 ACTUATOR 13B-24 FUEL INJECTION CONTROL 13B-31 IGNITION TIMING AND CONTROL FOR
More informationUIF Technology CO.,LTD.
CONTENTS 1. INTRODUCTION MEMOScanner is newly developed by UIF TECH, specially designed for car owners or DIYs. With an MEMOScanner, you may quickly find out trouble causes of electronically controlled
More informationAppendix B. Data Parameters. Current and Past TMC Engines Covered in this Section. Fig. B-1. TL874fB01. Engine Control Systems II - Course 874 B-1
Data Parameters Current and Past TMC Engines Covered in this Section Fig. B-1 TL874fB01 Engine Control Systems II - Course 874 B-1 OBD Data Parameters Signal Category Display Item Parameter Description
More informationIGNITION SYSTEM 8D - 1 IGNITION SYSTEM TABLE OF CONTENTS
LH IGNITION SYSTEM 8D - 1 IGNITION SYSTEM TABLE OF CONTENTS page AND IGNITION SYSTEM...1 SPARK PLUGS-PLATINUM....1 COIL ON PLUG...1 CRANKSHAFT POSITION SENSOR....2 CAMSHAFT POSITION SENSOR....3 KNOCK SENSOR....5
More informationG - TESTS W/CODES - 2.2L
G - TESTS W/CODES - 2.2L 1994 Toyota Celica 1994 ENGINE PERFORMANCE Toyota 2.2L Self-Diagnostics Celica INTRODUCTION If no faults were found while performing F - BASIC TESTING, proceed with self-diagnostics.
More informationGROUP 13Ab. 13Ab-2 CONTENTS TROUBLESHOOTING STRATEGY.. DATA LIST REFERENCE TABLE... 13Ab-29 TROUBLE CODE DIAGNOSIS...
13Ab-1 GROUP 13Ab CONTENTS TROUBLESHOOTING STRATEGY.. 13Ab-2 DATA LIST REFERENCE TABLE... 13Ab-29 TROUBLE CODE DIAGNOSIS..... 13Ab-2 FAIL-SAFE FUNCTION REFERENCE TABLE........................ 13Ab-20 DIAGNOSTIC
More informationSECTION 1F ENGINE CONTROLS
SECTION 1F ENGINE CONTROLS CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical
More informationC5 Computer Diagnostic Codes
C5 Computer Diagnostic Codes The ability to view engine operating data such as oil pressure and coolant temperature, in digital form on the instrument panel has been a feature of Corvettes since 1984.
More information2002 ENGINE PERFORMANCE. Self-Diagnostics - RAV4. Before performing testing procedures, check for any related Technical Service Bulletins (TSBs).
2002 ENGINE PERFORMANCE Self-Diagnostics - RAV4 INTRODUCTION NOTE: Before performing testing procedures, check for any related Technical Service Bulletins (TSBs). To properly diagnosis and repair this
More informationGenerator. Removal. Inspection 6D3 8 STARTING AND CHARGING SYSTEM (Y22SE 2.2L)
6D3 8 STARTING AND CHARGING SYSTEM (Y22SE 2.2L) Removal 1. Disconnect battery ground cable. 2. Move drive belt tensioner to loose side using wrench then remove drive belt. 3. Disconnect terminal B wiring
More informationProECU Subaru BRZ Toyota GT86 Scion FR-S
ProECU Subaru BRZ Toyota GT86 Scion FR-S DTC List 2012-onward Model Year v1.0 Engine DTC List P000A Camshaft Position "A" - Timing Slow Response Bank 1 P000B Camshaft Position "B" - Timing Slow Response
More information1. Connect the Honda PGM Tester or an OBD II scan tool to the 16P Data Link Connector (DLC) located behind the right side of the center console.
Troubleshooting Procedures I. How To Begin Troubleshooting When the Malfunction indicator Lamp (MIL) has been reported on, or there is a driveability problem, use the appropriate procedure below to diagnose
More informationEngine management/transmission
MAZDA Model: 323 (BG) 323 Estate 1,6/4x4 (BW) 323 (BA/BJ) 626/MX-6 626/Estate Xedos 6/9 MX-3/MX-5 Year: 1989-00 Engina code: BP, BP-DOHC, B3, B3E, B6, B6-SOHC, B6-DOHC, B6E,FP, FS, KF, KJ, KL K8, RF, RF-CX,
More informationL (LL8) Engine Diagnostic Parameters
Cam Shaft Position Actuator Control VCP System Performance VCP = variable cam phaser VCP Crank/Cam Correlation Error P0013 P0014 P0016 DESCRIPTION Detects an open or shorted control circuit by monitoring
More informationARTICLE BEGINNING INTRODUCTION SELF-DIAGNOSTIC SYSTEM RETRIEVING DTCS ENGINE PERFORMANCE Volkswagen Self-Diagnostics - Gasoline
Article Text ARTICLE BEGINNING 1996 ENGINE PERFORMANCE Volkswagen Self-Diagnostics - Gasoline Cabrio, Golf III, GTI, Jetta III, Passat INTRODUCTION If no faults were found while performing preliminary
More informationDTC P0172 Fuel Trim System Rich
Page 1 of 6 1997 Chevrolet Cavalier Cavalier, Sunfire (VIN J) Service Manual Document ID: 47788 DTC P0172 Fuel Trim System Rich System Description A Closed Loop air/fuel metering system is used to provide
More informationComponent Locations. Index. D16Y5 engine: Note: For troubleshooting of DTC related components see chart on page THROTTLE POSITION (TP) SENSOR
Index Note: For troubleshooting of DTC related components see chart on page 11-97. D16Y5 engine: THROTTLE POSITION (TP) MANIFOLD ABSOLUTE PRESSURE (MAP) EXHAUST GAS RECIRCULATION (EGR) VALVE and EXHAUST
More informationSetup Tabs. Basic Setup: Advanced Setup:
Setup Tabs Basic Setup: Password This option sets a password that MUST be entered to re-enter the system. Note: ProEFI can NOT get you into the calibration if you lose this password. You will have to reflash
More information