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 and AV control unit connector M194.
- Check continuity between display unit connector M93 terminals 11, 22 and AV control unit connector M194 terminals 73, 61.
Display unit AV control unit Continuity Connector Terminals Connector Terminals M93 11 M194 73 Yes 22 61 - Check continuity between display unit connector M93 terminals 11, 22 and ground.
Display unit Ground Continuity Connector Terminals M93 11 - No 22
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 and AV control unit connector M194.
- Turn ignition switch ON.
- Check signal between display unit connector M93 terminal 11 and ground.
Display unit Ground Condition Reference value (+) (-) Connector Terminal M93 11 - 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 M93 terminal 22 and ground.
Display unit Ground Condition Reference value (+) (-) Connector Terminal M93 22 - When adjusting display brightness. Is the inspection result normal?
YES
Inspection End.
NO
Replace display unit. Refer to REMOVAL AND INSTALLATION .