Diagnosis Procedure
WARNING: This page is about a different car, the 2010 Nissan Armada. 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 circuit. Refer to "DISPLAY UNIT : DIAGNOSIS PROCEDURE ".
Is inspection result OK?
YES: GO TO 2.
NO: Repair malfunctioning parts.
- CHECK CONTINUITY OF COMMUNICATION CIRCUIT
- Turn ignition switch OFF.
- Disconnect display unit connector and AV control unit connector.
- Check continuity between display unit harness connector M93 (A) terminals 11, 22 and AV control unit harness connector M44 (B) terminals 56, 44.CONTINUITY CHART
A B Continuity Connector Terminal Connector Terminal M93 11 M44 56 Yes 22 44 - Check continuity between display unit harness connector M93 (A) terminals 11, 22 and ground.CONTINUITY CHART
A - Continuity Connector Terminal M93 11 Ground No 22 Are continuity results as specified?
YES: GO TO 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 M93 terminal 11 and ground with an oscilliscope or CONSULT-III.SIGNAL REFERENCE
(+) (-) Reference signal Connector Terminal M93 22 Ground Courtesy of NISSAN MOTOR CO., U.S.A.
Are voltage readings as specified?
YES: GO TO 4.
NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".
- CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M93 terminal 22 and ground with an oscilliscope or CONSULT-III.
SIGNAL REFERENCE(+) (-) Reference signal Connector Terminal M93 11 Ground Courtesy of NISSAN MOTOR CO., U.S.A.
Are voltage readings as specified?
YES: Inspection End.
NO: Replace display unit. Refer to "REMOVAL AND INSTALLATION ".