DTC Diagnosis Procedure
- CHECK STARTING SYSTEM
Turn ignition switch to START position.
Does the engine turn over? Does the starter motor operate?
YES
GO TO 2.
NO
Check starting system. (Refer to Work Flow . For the details of the GR8-1200 NI, refer to STARTING SYSTEM : Preparation ).
- CHECK CAMSHAFT POSITION SENSOR POWER SUPPLY CIRCUIT-I
- Disconnect camshaft position (CMP) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between CMP sensor harness connector and ground.
CMP sensor
Ground
Voltage (V)
Bank
Connector
Terminal
2
F83
1
Ground
Approx. 5
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Refer to Diagnosis Procedure .
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit. Refer to Diagnosis Procedure .
NO
Repair or replace error-detected parts.
- CHECK CMP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between CMP sensor harness connector and ECM harness connector.
CMP sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
2
F83
2
F92
63
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK CMP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between CMP sensor harness connector and ECM harness connector.
CMP sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
2
F83
3
F92
66
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 6.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- Check the continuity between CMP sensor harness connector and ECM harness connector.
- CHECK CAMSHAFT POSITION SENSOR
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 7.
NO
Replace malfunctioning camshaft position sensor. Refer to TIMING CHAIN : Exploded View .
- CHECK CAMSHAFT (INT)
Check the following.
- Accumulation of debris to the signal plate of camshaft front end
- Chipping signal plate of camshaft front end
Is the inspection result normal?
YES
GO TO 8.
NO
Remove debris and clean the signal plate of camshaft front end or replace camshaft.
- Accumulation of debris to the signal plate of camshaft front end
- CHECK INTERMITTENT INCIDENT
Refer to Inspection .
INSPECTION END