P0340 REQUESTED INFORMATION. Pinpoint Test DR: Camshaft Position (CMP) Sensor Ford Pickup 5.4L Eng F150. 1Search.

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1 2004 Ford Pickup 5.4L Eng F150 1Search P0340 REQUESTED INFORMATION Pinpoint Test DR: Camshaft Position () Sensor Introduction Question: Alternator testing for false P0340 NOTE: This pinpoint test is intended to diagnose the following: Camshaft Position () Sensor. and SIGRTN circuits. Powertrain control module (PCM) (12A650). 1/28

2 Fig 1: Identifying Camshaft Position () Sensor Connector (1 Of 3) Courtesy of FORD MOTOR CO. 2/28

3 Fig 2: Identifying Camshaft Position () Sensor Connector (2 Of 3) Courtesy of FORD MOTOR CO. 3/28

4 Fig 3: Identifying Camshaft Position () Sensor Connector (3 Of 3) Courtesy of FORD MOTOR CO. 4/28

5 Fig 4: Camshaft Position 2 (2) Sensor Connector Courtesy of FORD MOTOR CO. Powertrain Control Module (PCM) Connector For PCM connector views or reference values, refer to REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. 5/28

6 Vehicle Connector Circuit Pin Aviator, LS, Thunderbird 150 ( ) Pin PWRGND2SIGRTN B24E54E17E53 Expedition, Navigator 122 Pin PWRGNDSIGRTN B1E25E31 Explorer, Focus 2.3L, Mountaineer 150 ( ) Pin PWRGNDSIGRTN B47E41E25 F Pin PWRGND2SIGRTN B67E44E58E45 All other vehicles 104 Pin PWRGNDSIGRTN Test Procedure NOTE: Proceed to DTC testing steps listed in FAULT CODE SETTING CONDITION table of fault code setting condition. FAULT CODE SETTING CONDITION Fault Code KOEO KOER Continuous Memory P0340 DR1 DR1 DR1 P0345 DR1 DR1 DR1 DR1 CONTINUOUS MEMORY DTCS P0340 AND P0345: CHECK IF THE ENGINE WILL START Attempt to start engine. Does the engine start? GO to DR2. Concern is elsewhere. RETURN to SYMPTOM CHARTS CNG, FLEX FUEL & GASOLINE for further direction. DR2 CONTINUOUS MEMORY DTCS P034 AND P0345: CLEAR AND ATTEMPT TO REGENERATE THE DTC Key in ON position Clear the PCM DTCs. Key on engine running. Increase the engine speed to greater than 1,500 RPM for 10 seconds. Repeat this three times. 6/28

7 Check for continuous memory DTCs: Are DTCs P0340 or P0345 present? For continuous memory DTC P0340, GO to DR3.For continuous memory DTC P0345, GO to DR12. GO to Z1. DR3 DETERMINE THE SENSOR PHYSICAL TYPE Key in OFF position. Is the sensor a synchronizer (gear driven) type? GO to DR4. GO to DR5. DR4 VERIFY THE CORRECT INSTALLATION OF THE SENSOR A sensor identifies the cylinder 1 power stroke. A sensor that is improperly installed/indexed can identify the wrong cylinder as 1, produce a tipin hesitation and generate DTC P0340. NOTE: If the vehicle has a miss with DTC P0340, ignition, alternator noise, RFI and CKP concerns should be considered. Is the sensor installed correctly? GO to DR5. REPOSITION the sensor. DR5 DETERMINE THE SENSOR ELECTRONIC TYPE NOTE: Variable Reluctance (VR) sensors have 2 wire connectors. Hall effect sensors have 3 wire connectors. Is the sensor a VR type? Key in OFF position.go to DR6. The sensor is a Hall effect type.go to DR /28

8 DR6 CONTINUOUS MEMORY DTC P0340: CHECK THE SENSOR RESISTANCE Sensor connector disconnected. Measure the resistance between: ( + ) Sensor Connector, Component Side ( ) Sensor Connector, Component Side SIGRTN Vehicle Low Limit High Limit LS, Thunderbird 3.9L 1850 Ohms 2850 Ohms F Ohms 425 Ohms All others 250 Ohms 1000 Ohms Is the resistance value(s) within specifications? GO to DR7. INSTALL a new sensor.clear the PCM DTCs. REPEAT the self test. DR7 CHECK THE CIRCUIT FOR A SHORT TO POWER IN THE HARNESS PCM connector disconnected. Key in ON position. Measure the voltage between: ( + ) Sensor Connector, Harness Side ( ) Vehicle Battery Negative terminal Is the voltage less than 1 V? Key in OFF position.go to DR8. REPAIR the short circuit. DR8 CHECK THE CIRCUIT FOR AN OPEN IN THE HARNESS Measure the resistance between: ( + ) PCM Connector, Harness Side ( ) Sensor Connector, Harness Side SIGRTN SIGRTN 8/28

9 Are the resistances less than 5 ohms? GO to DR9. REPAIR the open circuit. DR9 CHECK FOR A SHORT IN THE HARNESS BETWEEN THE PCM AND THE SENSOR Measure the resistance between: ( + ) Sensor Connector, Harness Side ( ) Sensor Connector, Harness Side SIGRTN Measure the resistance between: ( + ) Sensor Connector, Harness Side ( ) Vehicle Battery SIGRTN Negative terminal Negative terminal The measurement can be performed at either the PCM or harness connector. Are the resistances greater than 10K ohms? GO to DR10. REPAIR the short circuit. DR10 CHECK FOR SHORTS IN THE PCM PCM connector connected. Measure the resistance between: ( + ) Sensor Connector, Harness Side ( ) Sensor Connector, Harness Side SIGRTN Is the resistance greater than 500 ohms? GO to DR11. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. DR11 CHECK THE SENSOR OUTPUT 9/28

10 Sensor connector disconnected. Digital multimeter on low voltage AC scale. Measure the voltage between: ( + ) Sensor Connector, Component Side ( ) Sensor Connector, Component Side SIGRTN Run the engine at approximately 2,500 RPM. Is the voltage greater than 0.25 V? For F L, GO to DR26.For all others, INSTALL a new PCM.Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. INSTALL a new sensor.clear the PCM DTCs. REPEAT the self test. DR12 CONTINUOUS MEMORY DTC P0345: CHECK THE 2 SENSOR RESISTANCE Key in OFF position. 2 Sensor connector disconnected. Measure the resistance between: 2 ( + ) 2 Sensor Connector, Component Side SIGRTN ( ) 2 Sensor Connector, Component Side Vehicle Low Limit High Limit LS, Thunderbird 3.9L 1850 Ohms 2850 Ohms F Ohms 425 Ohms All others 250 Ohms 1000 Ohms Is the resistance value(s) within specifications? GO to DR13. INSTALL a new 2 sensor.clear the PCM DTCs. REPEAT the self test. DR13 CHECK THE 2 CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 10/28

11 PCM connector disconnected. Key in ON position. Measure the voltage between: ( + ) 2 Sensor Connector, Harness Side ( ) Vehicle Battery 2 Negative terminal Is the voltage less than 1 V? Key in OFF position.go to DR14. REPAIR the short circuit. DR14 CHECK THE 2 CIRCUIT FOR AN OPEN IN THE HARNESS Measure the resistance between: ( + ) PCM Connector, Harness Side ( ) 2 Sensor Connector, Harness Side 2 SIGRTN 2 SIGRTN Are the resistances less than 5 ohms? GO to DR15. REPAIR the open circuit. DR15 CHECK FOR A SHORT IN THE HARNESS BETWEEN THE PCM AND THE 2 SENSOR Measure the resistance between: ( + ) 2 Sensor Connector, Harness Side 2 ( ) 2 Sensor Connector, Harness Side SIGRTN Measure the resistance between: ( + ) 2 Sensor Connector, Harness Side ( ) Vehicle Battery 2 SIGRTN Negative terminal Negative terminal The measurement can be performed at either the PCM or 2 harness connector. 11/28

12 Are the resistances greater than 10K ohms? GO to DR16. REPAIR the short circuit. DR16 CHECK FOR A SHORT BETWEEN THE & 2 CIRCUITS Sensor connector disconnected. 2 Sensor connector disconnected. Measure the resistance between: ( + ) PCM Connector, Harness Side ( ) PCM Connector, Harness Side 2 Is the resistance greater than 10K ohms? GO to DR17. REPAIR the short circuit. DR17 CHECK FOR SHORTS IN THE PCM PCM connector connected. Measure the resistance between: ( + ) 2 Sensor Connector, Harness Side 2 ( ) 2 Sensor Connector, Harness Side SIGRTN Is the resistance greater than 500 ohms? GO to DR18. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. DR18 CHECK THE 2 SENSOR OUTPUT Digital multimeter on low voltage AC scale. Measure the voltage between: ( + ) 2 Sensor Connector, Component Side 2 ( ) 2 Sensor Connector, Component Side SIGRTN 12/28

13 Run the engine at approximately 2,500 RPM. Is the voltage greater than 0.25 V? For F L, GO to DR26.For all others, INSTALL a new PCM.Refer to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. INSTALL a new 2 sensor.clear the PCM DTCs. REPEAT the self test. DR19 CONTINUOUS MEMORY DTC P0340: CHECK THE VPWR VOLTAGE TO SENSOR Sensor connector disconnected. Key in ON position. Measure the voltage between: ( + ) Sensor Connector, Harness Side ( ) Vehicle Battery VPWR Negative terminal Is the voltage greater than 10.5 V? Key in OFF position.go to DR20. Key in OFF position. REPAIR the open circuit. DR20 CHECK THE PWRGND VOLTAGE TO SENSOR Measure the voltage between: ( + ) Sensor Connector, Harness Side ( ) Vehicle Battery PWRGND Positive terminal Is the voltage greater than 10.5 V? GO to DR21. REPAIR the open circuit. DR21 CHECK THE CIRCUIT FOR A SHORT TO POWER IN THE HARNESS PCM connector disconnected. Key in ON position. Measure the voltage between: 13/28

14 ( + ) Sensor Connector, Harness Side ( ) Vehicle Battery Negative terminal Is the voltage less than 1 V? Key in OFF position.go to DR22. REPAIR the short circuit. DR22 CHECK FOR AN OPEN CIRCUIT BETWEEN THE PCM AND SENSOR Sensor connector disconnected. Measure the resistance between: ( + ) Sensor Connector, Harness Side ( ) PCM Connector, Harness Side Is the resistance less than 5 ohms? GO to DR23. REPAIR the open circuit. DR23 CHECK THE SENSOR CIRCUIT FOR A SHORT TO GND IN THE HARNESS NOTE: The measurement may be taken at the PCM or connector, whichever is easier to access. Measure the resistance between: ( + ) Sensor Connector, Harness Side ( ) Sensor Connector, Harness Side PWRGND Is the resistance greater than 10K ohms? GO to DR24. REPAIR the short circuit. DR24 CHECK FOR SHORTS IN THE PCM Measure the resistance between: 14/28

15 ( + ) Sensor Connector, Harness Side ( ) Sensor Connector, Harness Side VPWR PWRGND Are the resistances greater than 500 ohms? GO to DR25. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. DR25 CHECK THE SENSOR OUTPUT DURING CRANK MODE Sensor connector connected. Digital multimeter on low voltage DC scale. Measure the voltage between: ( + ) PCM Connector, Harness Side ( ) PCM Connector, Harness Side PWRGND Crank the engine for at least 10 revolutions. Does the voltage switch between LOW (less than 2 volts DC) and HIGH (greater than 8 volts DC)? INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. INSTALL a new sensor.clear the PCM DTCs. REPEAT the selftest. DR26 CHECK THE VARIABLE CAMSHAFT TIMING (VCT) SYSTEM NOTE: Only diagnose the bank indicated by the DTC. NOTE: Concerns with the engine oil level, oil contamination, or VCT system may cause camshaft positioning errors. Key in OFF position. 15/28

16 Check that the engine oil is at the correct level. Check the engine oil for contaminants. Check the VCT system for correct operation. Is a concern present? REPAIR as necessary. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY FLASH EEPROM. P0340: CAMSHAFT POSITION () SENSOR CIRCUIT MALFUNCTION (BANK 1) P0340 CAMSHAFT POSITION () SENSOR CIRCUIT MALFUNCTION (BANK 1) Description: Possible Causes: The test fails when the PCM can no longer detect the signal from the sensor on Bank 1. circuit open. circuit short to GND. circuit short to PWR. SIG RTN open (VR sensor). GND open (Halleffect sensor). incorrectly installed (Hall effect sensor). Damaged sensor shielding. Damaged sensor. Damaged PCM. Diagnostic Aids: Harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have an intermittent impact on the signal. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to PINPOINT TEST DR: CAMSHAFT POSITION () SENSOR Step 1. Test Procedure NOTE: Proceed to DTC testing steps listed in 16/28

17 FAULT CODE SETTING CONDITION table of fault code setting condition. FAULT CODE SETTING CONDITION Fault Code KOEO KOER Continuous Memory P0454 Z1 Z1 DIRECTION FOR INTERMITTENT DIAGNOSTIC PATH CAUTION: Proceed with this step only if the DTCs were not cleared previously. Be sure to record freeze frame data prior to the clearing the DTCs. Clearing the DTCs erases freeze frame data and eliminates FMEM. This also makes sure any PCM related symptoms are reproduced. Connect the diagnostic tool to data link connector (DLC). Key in ON position. CLEAR the DTCs. Have the DTCs been cleared? GO to Z2. Key in OFF position. CLEAR the DTCsGO to Z2. Z2 SELECT THE PIDS AND/OR SIGNALS RELATED TO THE SYSTEM A list of related PIDs and/or signals are needed for use with the diagnostic tool to monitor the suspect areas. Obtain the customer symptom description. Use the Reference Value Symptom chart and proceed to the Reference Value PID/Signal Measurement chart located at the beginning of REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Highlight each available PID/signal recommended by the charts under the PID/signal selection menu on the diagnostic tool. Have all available PIDs/signals related to the symptom been selected? GO to Z3. Repeat Z2 Z3 DECISION TO VERIFY THE SYMPTOM 17/28

18 NOTE: The path to symptom verification is optional, but is recommended for several reasons. For example: the vehicle is in for a repeat repair, or there is no DTC present. Has a fault symptom been detected? GO to Z10. GO to Z4. Z4 COLLECT ANY SYMPTOM RELATED DATA TO AID IN VERIFICATION NOTE: Only MIL codes trigger freeze frame data. REFER to the diagnostic tool instruction manual to retrieve freeze frame information. Prepare the freeze frame data for use with information from the SYMPTOM CHARTS CNG, FLEX FUEL & GASOLINE. CHECK the continuous memory DTCs that should have been recorded from an earlier pinpoint test. Access the information from the customer information worksheet and the customer if available. Access any other symptom related data available, such as TSBs and OASIS reports. Has all available data been recorded? GO to Z5. Gather as much data as possible to aid in isolatingthe intermittent fault area. Repeat Step Z4. Z5 RECREATE THE SYMPTOM USING ALL AVAILABLE DATA NOTE: To recreate the original conditions that set the DTC or caused the symptom, the vehicle may require driving. With the diagnostic tool, select and monitor the same PIDs as displayed in freeze frame along with previously selected PIDs/signals from step Z2. Using freeze frame data recorded earlier, recreate the conditions described by each freeze frame PID. Pay special attention to ECT, LOAD, RPM and VSS. Also, use any available data from the customer, TSBs, and other sources to aid in producing the correct conditions for recreating the symptom. 18/28

19 When the symptom occurs, press the trigger to begin recording. Refer to the diagnostic tool instruction manual for information on the recorder function. Could the symptom be recreated? GO to Z10. GO to Z6. Z6 RECREATE THE SYMPTOM USING THE KOEO AND ROAD TEST PROCEDURE The road test is the last attempt to locate the area of concern before physically disturbing vehicle circuits. NOTE: PIDs for output in the Reference Value Charts represent command values only. Circuit measurements with a digital multimeter indicate the actual output status. Therefore, in the case of a fault, the PID and circuit reading on the vehicle may not correspond with each other. PIDs for PCM/TCM circuits with a mismatch in the digital multimeter measurement indicate a possible PCM/TCM concern. The intermittent road test procedure is a set of instructions for monitoring PIDs/signals with a diagnostic tool and circuit measurements with a digital multimeter. This is done under 4 different conditions key on/engine off, hot idle, 48 km/h (30 mph) and 88 km/h (55 mph). Use the typical diagnostic Reference Values from REFERENCE VALUES CNG, FLEX FUEL & GASOLINE to compare with the actual vehicle. For actual road test at speeds, a planned route or test track and passenger is required. Locate the correct Reference Value Chart in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Set the vehicle up to measure the circuits with a digital multimeter and a diagnostic tool. Connect the diagnostic tool to data link connector (DLC). Key in ON position. With the diagnostic tool, select and monitor PIDs and measure circuits shown in the Reference Value Chart in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Compare the diagnostic tool PIDs and digital multimeter values to the Reference Value Charts. 19/28

20 Are any values out of range? GO to Z10. GO to Z7. Z7 RECREATE THE SYMPTOM USING THE HOT IDLE ROAD TEST PROCEDURE The engine temperature should be at least 87 deg C (195 deg F). Key on engine running. Continue to monitor the PIDs and circuits as in the previous step. Are any values out of range? GO to Z10. GO to Z8. Z8 RECREATE THE SYMPTOM USING THE 48 KM/H (30 MPH) SLOW CRUISE ROAD TEST PROCEDURE Drive the vehicle on a preplanned route. Continue to monitor the PIDs and circuits as in the previous step. Are any values out of range? GO to Z10. GO to Z9. Z9 RECREATE THE SYMPTOM USING 88 KM/H (55 MPH) HIGH CRUISE ROAD TEST PROCEDURE Continue to drive the vehicle on the preplanned route. Continue to monitor the PIDs and circuits as in the previous step. Are any values out of range? GO to Z10. It is now necessary to physically disturb the selected vehicle circuits in an attempt to recreate the intermittent concerngo to Z10. Z10 SELECT CIRCUITS FROM THE INTERMITTENT TEST CHART Remain in the PID/Signal selection menu with the diagnostic tool. If the intermittent road test was used to verify the symptom, highlight the 20/28

21 PIDs/signals that were displayed as a mismatch to the Reference Values from REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Otherwise, highlight only the PIDs/signals from step Z2. Proceed to the PCM/TCM PIDS/SIGNALS chart located at the beginning of this pinpoint test. Match the selected PIDs/signals to the corresponding circuit in the chart. There may be more than one circuit to test. If a PID/signal recording was made with the diagnostic tool, it may be helpful to replay it at this time. Refer to the diagnostic tool instruction manual for recorder function information. NOTE: From the same chart, be sure to select and proceed with the appropriate test type. Input Test used on sensing inputs such as temperature, position or oxygen. Output Test used on output devices such as relays, coils or solenoids. Has a test been chosen? For Input TestGO to Z11For Output TestGO to Z15. To diagnose other drivability symptoms, go to SYMPTOM CHARTS CNG, FLEX FUEL & GASOLINE. Z11 KOEO INPUT TEST PROCEDURE FOR THE PCM/TCM SENSORS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. Using the circuits chosen from the PCM/TCM PIDS/SIGNALS Chart, select only the recommended PIDs/signals to monitor with the diagnostic tool. If a PID is not available for the circuit, use a digital multimeter to check the value. Proceed to the area of the suspect wiring or component fault. Key in ON position. If the input is a switch type component, turn it on manually. Monitor the PID or digital multimeter while tapping on the component. Monitor while wiggling the sensor harness wire from the component to the PCM/TCM. 21/28

22 Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Are there abrupt changes in the PID values that do not compare with REFERENCE VALUES CNG, FLEX FUEL & GASOLINE readings? REPAIR as necessary. VERIFY the repair. GO to Z13. Z12 KOER INPUT TEST PROCEDURE FOR THE PCM/TCM SENSORS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. Key on engine running. Continue to monitor the PIDs and circuits as in the previous step. Proceed to the area of the suspect wiring or component fault. If the input is a switch type component, turn it on manually. Monitor the PID or digital multimeter while tapping on the component. Monitor while wiggling the sensor harness wire from the component to the PCM/TCM. Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Are any values fluctuating in and out of range? REPAIR as necessary. VERIFY the repair. GO to Z13. Z13 KOEO WATER SOAK TEST PROCEDURE FOR THE PCM/TCM SENSORS, EXCLUDING HIGH VOLTAGE CIRCUITS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. 22/28

23 Key in ON position. Continue to monitor the PIDs and circuits as in the previous step. Proceed to the area of the suspect wiring or component fault. If the input is a switch type component, turn it on manually. Monitor the PID or digital multimeter values while lightly spraying a water mist on the component to PCM/TCM. Monitor while spraying the sensor harness wire from the component to the PCM/TCM. Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Are any values fluctuating in and out of range? REPAIR as necessary. VERIFY the repair. GO to Z14. Z14 KOER WATER SOAK TEST PROCEDURE FOR THE PCM/TCM SENSORS, EXCLUDING HIGH VOLTAGE CIRCUITS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. Key on engine running. Continue to monitor the PIDs and circuits as in the previous step. Proceed to the area of the suspect wiring or component fault. If the input is a switch type component, turn it on manually. Monitor the PID or digital multimeter values while lightly spraying a water mist on the component to PCM/TCM. Monitor while spraying the sensor harness wire from the component to the PCM/TCM. Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. 23/28

24 Are any values fluctuating in and out of range? REPAIR as necessary. VERIFY the repair. GO to Z15. Z15 KOER WATER SOAK TEST PROCEDURE FOR THE PCM SENSORS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. Using the circuits chosen from the PCM/TCM PIDS/SIGNALS Chart, select only the recommended PIDs/signals to monitor with the diagnostic tool. If a PID is not available for the circuit, use a digital multimeter to check the value. NOTE: Remember that PIDs selected from the Intermittent Test Chart display commanded values only. A digital multimeter measurement is needed to display the actual values. Be sure to compare them. Look for fluctuations to occur during any part of the following test. The Output State Test may not control some outputs, such as injectors and ignition coils and may not be available for all actuators. CAUTION: The cooling fans or the fuel pump may turn on during the next steps. Key in ON position. With the diagnostic tool, turn on selected outputs using Output State Control. Refer to the diagnostic tool instruction manual. Proceed to the area of the suspect wiring or component fault. Monitor the PID or digital multimeter while tapping on the component. Monitor while wiggling the sensor harness wire from the component to the PCM/TCM. Look for abrupt changes in the values. Compare these actual values to the 24/28

25 Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Is there a mismatch between command and actual or are any values fluctuating in and out of range when compared to the Reference Value Charts in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE? REPAIR as necessary. VERIFY the repair. GO to Z16. Z16 KOER OUTPUT TEST PROCEDURE FOR THE PCM/TCM ACTUATORS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. NOTE: Remember that PIDs selected from the PCM/TCM PIDS/SIGNALS Chart display commanded values only. A digital multimeter measurement is needed to display the actual values. Be sure to compare them. Look for fluctuations to occur during any part of the following test. The Output State Test may not control some outputs, such as injectors and ignition coils and may not be available for all actuators. To test these output types, GO to Z18. Key on engine running. Proceed to the area of the suspect wiring or component fault. Monitor the PIDs with the diagnostic tool and note the values. Compare the diagnostic tool values with values from a digital multimeter with the engine at idle. While tapping on the suspect component look for fluctuations in the values. If a coil for a coil on plug application is suspect, turn off the key. Gain access to the coil and measure continuity from the spark plug terminal to the signal terminal while tapping the coil. A large fluctuation in resistance indicates an intermittent open or short. Monitor while wiggling the sensor harness wire from the component to the PCM/TCM. 25/28

26 Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Is there a diagnostic tool to digital multimeter value mismatch or an idle fluctuation? REPAIR as necessary. VERIFY the repair. GO to Z17. Z17 KOEO WATER SOAK TEST PROCEDURE FOR THE PCM/TCM ACTUATORS, EXCLUDING HIGH VOLTAGE CIRCUITS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. CAUTION: When performing any test steps, always be aware of hands, clothing or tools near cooling fans, belts or hot surfaces. NOTE: Remember that PIDs selected from the PCM/TCM PIDS/SIGNALS Chart display commanded values only. A digital multimeter measurement is needed to display the actual values. Be sure to compare them. Look for fluctuations to occur during any part of the following test. The Output State Test may not control some outputs, such as injectors and ignition coils and may not be available for all actuators. To test these output types, GO to Z18. Key in ON position. With the diagnostic tool, turn on selected outputs using Output State Control. Refer to the diagnostic tool instruction manual. Proceed to the area of the suspect wiring or component fault. Monitor the PID or digital multimeter values while lightly spraying a water mist on the component to PCM/TCM. 26/28

27 Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Is there a mismatch between command and actual or are any values fluctuating in and out of range when compared to the Reference Value Charts in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE? REPAIR as necessary. VERIFY the repair. GO to Z18. Z18 KOER WATER SOAK TEST PROCEDURE FOR THE PCM/TCM ACTUATORS WARNING: WHEN PERFORMING ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. CAUTION: When performing any test steps, always be aware of hands, clothing or tools near cooling fans, belts or hot surfaces. Key on engine running. Using the circuits chosen from the PCM/TCM PIDS/SIGNALS Chart, select only the recommended PIDs/signals to monitor with the diagnostic tool. If a PID is not available for the circuit, use a digital multimeter to check the value. Proceed to the area of the suspect wiring or component fault. Monitor the PID or digital multimeter values while lightly spraying a water mist on the component to PCM/TCM. Monitor while spraying the sensor harness wire from the component to the PCM/TCM. Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE. Is there a mismatch between command and actual or are any values fluctuating in and out of range when compared to the Reference Value Charts in REFERENCE VALUES CNG, FLEX FUEL & GASOLINE? 27/28

28 REPAIR as necessary. VERIFY the repair. GO to Z19. Z19 INSPECT FOR INTERMITTENT MECHANICAL CONCERNS NOTE: It is possible for an intermittent mechanical concern to cause a good PCM/TCM system to react abnormally. An inspection of DTC related mechanical systems should have been performed earlier. If not, visually inspect at this time. Look for possible vacuum lines, wires, cables, linkage or hoses that may become kinked, shorted or restricted during normal engine operation. This may include engine/transmission gear changes, acceleration and deceleration, rough roads and various engine RPM and torque related conditions. Is a mechanical concern detected? REPAIR as necessary. VERIFY the repair. It is necessary to seek additional help. REFER to the Professional Technician Society (PTS) web site or the Technical Hotline. A vehicle data recorder (VDR) or similar recorder may also be useful. 28/28

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