DTC P0335 Crankshaft Position Sensor "A" Circuit

Transcription

1 2TR-FE EINE CONTROL SYSTEM SFI SYSTEM 77 DTC P0335 Crankshaft Position Sensor "A" Circuit DTC P0339 Crankshaft Position Sensor "A" Circuit Intermittent DCRIPTION The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled. DTC No. DTC Detection Trouble Areas P0335 P0339 No Crankshaft Position (CKP) sensor signal to ECM while cranking ( trip detection logic) No CKP sensor signal to ECM at engine speed of 600 rpm or more ( trip detection logic) Under conditions, (b) and (c), no Crankshaft Position (CKP) sensor signal to ECM for 0.05 seconds or more ( trip detection logic): Engine speed,000 rpm or more (b) Starter signal OFF (c) 3 seconds or more have elapsed since starter signal switched from ON to OFF Open or short in CKP sensor circuit CKP sensor Sensor plate (CKP sensor plate) ECM Open or short in CKP sensor circuit CKP sensor Sensor plate (CKP sensor plate) ECM CH (2) ND CH2 () ND A063955E02 Reference: Inspection using an oscilloscope The correct waveform is shown on the left. 2 stands for the Camshaft Position (CMP) sensor signal, and stands for the CKP sensor signal. Items Terminals Equipment Settings Contents CH: 2 - CH2: - 5 V/Division, 20 ms/division Cranking or idling MONITOR DCRIPTION If there is no signal from the CKP sensor despite the engine revolving, the ECM interprets this as a malfunction of the sensor. If the malfunction is not repaired successfully, a DTC is set 0 seconds after the engine is next started.

2 78 2TR-FE EINE CONTROL SYSTEM SFI SYSTEM MONITOR STRATEY Related DTCs P0335: Crankshaft position sensor range check during cranking P0335: Crankshaft position sensor range check during engine running Required Sensors/Components (Main) Crankshaft Position (CKP) sensor Required Sensors/Components (Related) - Frequency of Operation Continuous Duration met for 3 times MIL Operation Immediate Sequence of Operation None TYPICAL ENABLI CONDITIONS Monitor runs whenever following DTCs not present None Crankshaft Position Sensor Range Check during Cranking P0335: Starter ON Minimum battery voltage while starter ON Less than V Number of camshaft position sensor signal pulse 6 or more Crankshaft Position Sensor Range Check during Engine Running P0335: Engine speed 600 rpm or more Starter OFF Time after starter from ON to OFF 3 seconds or more TYPICAL MALFUNCTION THRHOLDS Crankshaft Position Sensor Range Check during Cranking P0335: Number of crankshaft position sensor signal pulse Crankshaft Position Sensor Range Check during Engine Running P0335: CKP sensor signal 32 or less, or 74 or more No signal COMPONENT OPERATI RAE CKP sensor CKP sensor output voltage fluctuates while crankshaft revolving 34 CKP sensor signals per crankshaft revolution

3 2TR-FE EINE CONTROL SYSTEM SFI SYSTEM 79 WIRI DIARAM ECM L Instrument Panel J/B No C Camshaft Position Sensor Crankshaft Position Sensor BR 2 R J/C J2 *: Shielded BR EH A2744E0 If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical systems. Check the engine speed. The engine speed can be checked by using an intelligent tester. To check, follow the operation below: Connect an intelligent tester to the DLC3. (b) Start the engine. (c) Turn the tester ON. (d) Select the following menu items: DIANOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / EINE SPD. The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the CKP sensor voltage output is insufficient. Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

4 80 2TR-FE EINE CONTROL SYSTEM SFI SYSTEM INSPECT CRANKSHAFT POSITION SENSOR (RISTANCE) Component Side: Crankshaft Position Sensor Disconnect the Crankshaft Position (CKP) sensor connector. (b) Measure the resistance between terminals and 2. Standard Resistance Specified - 2,630 to 2,740 Ω at cold Front View E02 (c) - 2 2,065 to 3,225 Ω at hot Terms cold and hot refer to the temperature of the coils. Cold means approximately -0 to 50 C (4 to 22 F). Hot means approximately 50 to 00 C (22 to 22 F). Reconnect the CKP sensor connector. REPLACE CRANKSHAFT POSITION SENSOR 2 CHECK HARNS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Wire Harness Side: Crankshaft Position Sensor Connector (b) (c) Disconnect the CKP sensor connector. Disconnect the ECM connector. Check the resistance. Standard Resistance (Check for open) (-) - (-27) Specified Below Ω (-2) - (-34) Below Ω Standard Resistance (Check for short) Front View ECM Connector (-) or (-27) - Body ground Specified 0 kω or higher (d) (e) (-2) or (-34) - Body ground Reconnect the ECM connector. Reconnect the CKP sensor connector. 0 kω or higher REIR OR REPLACE HARNS OR CONNECTOR A3506E0

5 2TR-FE EINE CONTROL SYSTEM SFI SYSTEM 8 3 CHECK CRANKSHAFT POSITION SENSOR (SENSOR INSTALLATION) Check the CKP sensor installation. : Sensor is installed correctly. SECURELY REINSTALL SENSOR Normal Clearance Abnormal BR03795E3 4 CHECK CRANKSHAFT TIMI PULLEY (TEETH OF PLATE) Check the teeth of the sensor plate. : Sensor plate does not have any cracks or deformation. REPLACE CRANKSHAFT POSITION SENSOR PLATE REPLACE ECM