Diagnosis Procedure
WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC PRIORITY
If DTC P23E9 is displayed with DTC P0345 or P1145, first perform the confirmation procedure (trouble diagnosis) for DTC P0345 or P1145.
Is DTC P0345 or P1145 detected?
YES
Perform diagnosis of applicable.
- DTC P0335: Refer to DTC Description .
- DTC P1145: Refer to DTC Description .
NO
GO TO 2.
- CHECK INTAKE CAMSHAFT POSITION (CMP) SENSOR (BANK 2) SIGNAL CIRCUIT FOR ELECTRIC INTAKE VALVE TIMING CONTROL
- Turn ignition switch OFF.
- Disconnect ECM harness connector and electric intake valve timing control module harness connector.
- Check the continuity between ECM harness connector and electric intake valve timing control module harness connector.
ECM
Electric intake valve timing control module
Continuity
Connector
Terminal
Connector
Terminal
F78
78
F105
27
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.