Diagnosis Procedure
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITH NAVIGATION SYSTEM ".
- 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 COMMUNICATION CIRCUIT
- Turn ignition switch OFF.
- Disconnect display unit connector M92 and AV control unit connector M37.
- Check continuity between display unit harness connector M92 (A) terminals 11, 22 and AV control unit harness connector M37 (B) terminals 30, 31.
A B Continuity Connector Terminal Connector Terminal M92 11 M37 30 Yes 22 31 - Check continuity between display unit harness connector M92 (A) terminals 11, 22 and ground.Fig 1: Checking Continuity Between Display Unit Connector M92 (A) Terminals And AV Control Unit Connector M37 (B) Terminals
Courtesy of NISSAN NORTH AMERICA, INC.
A - Continuity Connector Terminal M92 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 M92 and AV control unit connector M37.
- Turn ignition switch ON.
- Check signal between display unit harness connector M92 terminal 11 and ground.
Connector Terminals Reference Signal (+) (-) M92 11 Ground
Courtesy of NISSAN NORTH AMERICA, INC.
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 M92 terminal 22 and ground.
Connector Terminals Reference Signal (+) (-) M92 22 Ground Courtesy of NISSAN NORTH AMERICA, INC.
Are voltage readings as specified?
YES: Inspection End.
NO: Replace display unit. Refer to "REMOVAL AND INSTALLATION ".