Diagnosis Procedure
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to WIRING DIAGRAM .
- CHECK POWER SOURCE
- Turn ignition switch OFF.
- Disconnect BCM connector M18.
- Check voltage between BCM connector M18 terminal 27 and ground while pressing the brake pedal.
BCM Ground Condition Voltage Connector Terminal Brake pedal depressed Battery voltage M18 27
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
GO TO STEP 2 .
- CHECK STOP LAMPS
Do the stop lamps operate normally?
Is the inspection result normal?
YES
Check the following:
- Harness between fuse block (J/B) and BCM.
- Fuse block (J/B).
NO
Refer to WIRING DIAGRAM .
- CHECK HARNESS BETWEEN BCM AND CVT SHIFT SELECTOR
- Disconnect CVT shift selector connector.
- Check continuity between BCM connector M80 terminal 108 and CVT shift selector connector M78 terminal 3.
BCM CVT shift selector Continuity Connector Terminal Connector Terminal M80 108 M78 3 Yes - Check continuity between BCM connector M80 terminal 108 and ground.
BCM Ground Continuity Connector Terminal M80 108 No
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Repair or replace harness or connector.
- CHECK GROUND CIRCUIT (CVT SHIFT SELECTOR)
Check continuity between CVT shift selector connector M78 terminal 4 and ground.
CVT shift selector Ground Continuity Connector Terminal M78 4 Yes Is the inspection result normal?
YES
Replace CVT shift selector. Refer to REMOVAL AND INSTALLATION .
NO
Repair or replace harness or connector.