P0335
2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0335,P0339: Crankshaft Position Sensor "A" Circuit
DESCRIPTION
The crankshaft position sensor system consists of a crank angle 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 by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection time and ignition timing are controlled.
- Reference: Inspection using an oscilloscope
HINT
* The correct waveforms are as shown.
* G2 stands for the camshaft position sensor signal, and NE+ stands for the crankshaft position sensor signal.
* Grounding failure of the shielded wire may cause noise in waveforms.
MONITOR DESCRIPTION
If there is no signal from the crankshaft position 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 10 seconds after the engine is next started.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Crankshaft Position Sensor Verify Pulse Input
Case 1
Case 2
Crankshaft Position Sensor Range Check/Rationality
TYPICAL MALFUNCTION THRESHOLDS
Crankshaft Position Sensor Verify Pulse Input
Crankshaft Position Sensor Range Check/Rationality
COMPONENT OPERATING RANGE
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Start the engine.
7. Idle the engine for 20 seconds or more [A].
8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
9. Read pending DTCs.
HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11. Input the DTC: P0335 or P0339.
12. Check the DTC judgment result.
HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [A] through [B] again.
13. If no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor.
(1) Installation condition of the camshaft position sensor
(2) Installation condition of the camshaft
(3) Connection of the camshaft position sensor connector
* Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the operation below:
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.
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 sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the crankshaft position sensor voltage output is insufficient.
* Read freeze frame data using the Techstream. Freeze frame data records 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.
PROCEDURE
1. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)
(a) Disconnect the C5 Crankshaft Position (CKP) sensor connector.
(b) Measure the resistance between terminals 1 and 2.
Standard Resistance:
HINT
Terms cold and hot refer to the temperature of the coils. Cold means approximately -10 to 50°C (14 to 122°F). Hot means approximately 50 to 100°C (122 to 212°F).
(c) Reconnect the CKP sensor connector.
NG -- REPLACE CRANKSHAFT POSITION SENSOR Removal
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Disconnect the C5 CKP sensor connector.
(b) Disconnect the E4 ECM connector.
(c) Check the resistance.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
(d) Reconnect the ECM connector.
(e) Reconnect the CKP sensor connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK CRANKSHAFT POSITION SENSOR (SENSOR INSTALLATION)
(a) Check the CKP sensor installation.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
4. CHECK CRANKSHAFT TIMING PULLEY (TEETH OF PLATE)
(a) Check the teeth of the sensor plate.
OK:
Sensor plate does not have any cracks or deformation.
NG -- REPLACE CRANKSHAFT POSITION SENSOR PLATE
OK -- REPLACE ECM Removal