P0335

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0335, P0339: Crankshaft Position Sensor "A" Circuit


DESCRIPTION

The crankshaft position (CKP) sensor system consists of a crank angle sensor plate and a pick up coil.

The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of windings, an iron core and 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 for each engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection time and ignition time are controlled.





- Reference: Inspection using an oscilloscope.





HINT
* The correct waveform is as shown.
* VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.





MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor despite the crankshaft rotating, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





P0335: Crankshaft Position Sensor Range Check/Rationality





P0335: Crankshaft Position Sensor Verify Pulse Input (Case 1)





P0335: Crankshaft Position Sensor Verify Pulse Input (Case 2)





TYPICAL MALFUNCTION THRESHOLDS

P0335: CKP Sensor Range Check/Rationality





P0335: CKP Sensor Verify Pulse Input





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 the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.

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 / Trouble Codes.

9. Read the DTCs [B].

HINT
* If a DTC is not output, perform the following procedure.
* If a DTC is output, the system is malfunctioning.

10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

11. Input the DTC: P0335 or P0339.

12. Check the DTC judgment result.





HINT
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

13. If no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

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 VVT sensor.
* Installation condition of the VVT sensor
* Installation condition of the camshaft
* Connection of the VVT sensor connector
* If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
* Check the engine speed. The engine speed can be checked by using Techstream. To check, follow the procedure below:
(1) Connect Techstream to the DLC3.
(2) Start the engine.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine / 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 (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the CKP sensor output voltage is insufficient.
* Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. INSPECT CRANKSHAFT POSITION SENSOR

(a) Inspect the crankshaft position sensor Testing and Inspection.

NG -- REPLACE CRANKSHAFT POSITION SENSOR Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the CKP sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

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 SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

(a) Check the CKP sensor installation condition.





OK:

Sensor is installed correctly.

NG -- REPLACE CRANKSHAFT POSITION SENSOR Removal
OK -- Continue to next step.

4. INSPECT CRANKSHAFT (TEETH OF CRANK ANGLE SENSOR PLATE)

(a) Inspect the teeth of the crank angle sensor plate.

OK:

Crank angle sensor plate does not have any cracks or deformation.

NG -- REPLACE CRANKSHAFT Disassembly

OK -- REPLACE ECM Removal