Diagnosis Procedure
WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to DIAGNOSIS PROCEDURE .
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Repair malfunctioning parts.
- CHECK CONTINUITY COMMUNICATION CIRCUIT
- Turn ignition switch OFF.
- Disconnect display unit connector and AV control unit connector.
- Check continuity between display unit harness connector and AV control unit harness connector.
Display unit AV control unit Continuity Connector Terminals Connector Terminals M194 11 M215 51 Existed 22 39 - Check continuity between display unit harness connector and ground.
Display unit Ground Continuity Connector Terminals M194 11 Not existed 22
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
Repair harness or connector.
- CHECK COMMUNICATION SIGNAL
- Connect display unit connector and AV control unit connector.
- Turn ignition switch ON.
- Check signal between display unit harness connector and ground.
(+) (-) Condition Reference value Display unit Connector Terminal M194 11 Ground 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
Check signal between display unit harness connector and ground.
(+) (-) Condition Reference value Display unit Connector Terminal M194 22 Ground When adjusting display brightness. Is the inspection result normal?
YES
INSPECTION END
NO
Replace display unit. Refer to REMOVAL AND INSTALLATION .