Operation CHARM: Car repair manuals for everyone.
Home >> Toyota Truck >> 2011 >> FJ Cruiser 4WD V6-4.0L (1GR-FE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0335

P0335





1GR-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 crank angle sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet.

The crank angle 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 speed. Using these calculations, the fuel injection time and ignition timing are controlled.





VV1, VV2 and NE signal waveforms





- Inspection using an oscilloscope.

HINT
* The correct waveform is shown above.
* VV1+ and VV2+ stand for the VVT sensor (for intake side) signal, and NE+ stands for the crankshaft position sensor signal.






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 20 seconds after the engine is next started.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





Crankshaft Position Sensor Range Check/Rationality





Crankshaft Position Sensor Verify Pulse Input: Case 1





Crankshaft Position Sensor Verify Pulse Input: Case 2





TYPICAL MALFUNCTION THRESHOLDS

Crankshaft Position Sensor Range Check/Rationality





Crankshaft Position Sensor Verify Pulse Input: Case 1 and 2





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 operation).

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 the DTCs.

HINT
* If a DTC is output, the system is malfunctioning.
* If a 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] 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.
(1) Installation condition of the VVT sensor.
(2) Installation condition of the camshaft.
(3) Connection of the VVT sensor connector.
* 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 a Techstream. To check, follow the operation below:
(1) Connect the Techstream to the DLC3.
(2) Start the engine.
(3) Turn the Techstream on.
(4) Enter the following menu items: Powertrain / Engine and ECT / Data List / 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 CKP sensor voltage output is insufficient.
* Read freeze frame data using the Techstream. 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.

PROCEDURE

1. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

(a) Inspect the crankshaft position sensor Component Tests and General Diagnostics.

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

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

(a) Disconnect the crankshaft position 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):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)





(a) Check the crankshaft position sensor installation.

OK:

Crankshaft position sensor is installed correctly.

NG -- SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Installation
OK -- Continue to next step.

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

(a) Check 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
pro multis · About Operation CHARM