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 BCI OFF SWITCH SIGNAL INPUT
- Turn the ignition switch ON.
- Check voltage between ADAS control unit harness connector and ground.
Terminals Condition Voltage
(Approx.)(+) (-) ADAS control unit Ground BCI OFF switch Connector Terminal B104 22 Pressed 0 V Released 12 V Is the inspection result normal?
YES
Replace the ADAS control unit. Refer to REMOVAL AND INSTALLATION .
NO
GO TO STEP 2 .
- CHECK BCI OFF SWITCH
- Turn ignition switch OFF.
- Remove BCI OFF switch.
- Check BCI OFF switch. Refer to COMPONENT INSPECTION .
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Replace the BCI OFF switch. Refer to REMOVAL AND INSTALLATION .
- CHECK BCI OFF SWITCH CIRCUIT
- Disconnect the combination meter harness connector.
- Check continuity between BCI OFF switch harness connector and the combination meter harness connector.
BCI OFF switch Combination meter Continuity Connector Terminal Connector Terminal M27 2 M23 48 Yes Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Repair harness or connector.
- CHECK BCI OFF SWITCH CIRCUIT FOR OPEN
- Disconnect the ADAS control unit connector.
- Check continuity between the ADAS control unit harness connector and BCI OFF switch harness connector.
ADAS control unit BCI OFF switch Continuity Connector Terminal Connector Terminal B104 22 M27 6 Yes
Is the inspection result normal?
YES
GO TO STEP 5 .
NO
Repair the harnesses or connectors.
- CHECK BCI OFF SWITCH CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
ADAS control unit Ground Continuity Connector Terminal B104 22 No Is the inspection result normal?
YES
Replace the ADAS control unit. Refer to REMOVAL AND INSTALLATION .
NO
Repair the harnesses or connectors.