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 DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Repair or replace harness or connectors.
- CHECK COMMUNICATION CIRCUIT CONTINUITY
- Turn ignition switch OFF.
- Disconnect display unit connector M92 and AV control unit connector M124.
- Check continuity between display unit connector M92 terminals 9, 10 and AV control unit connector M124 terminals 77, 61.
Display unit AV control unit Continuity Connector Terminals Connector Terminals M92 9 M124 77 Yes 10 61 - Check continuity between display unit connector M92 terminals 9, 10 and ground.
Display unit Ground Continuity Connector Terminals M92 9 - No 10
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair or replace harness or connectors.
- CHECK COMMUNICATION SIGNAL (CONT→DISP)
- Connect display unit connector M92 and AV control unit connector M124.
- Turn ignition switch ON.
- Check signal between display unit connector M92 terminal 10 and ground.
Display unit Ground Condition Reference value (+) (-) Connector Terminal M92 10 - When adjusting display brightness.
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Replace AV control unit. Refer to REMOVAL AND INSTALLATION .
- CHECK COMMUNICATION SIGNAL (DISP→CONT)
Check signal between display unit connector M92 terminal 9 and ground.
Display unit Ground Condition Reference value (+) (-) Connector Terminal M92 9 - When adjusting display brightness. Is the inspection result normal?
YES
Inspection End.
NO
Replace display unit. Refer to REMOVAL AND INSTALLATION .