Diagnosis Procedure
WARNING: This page is about a different car, the 2013 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".
- CONNECTOR CHECK
Check the AV control unit, audio amplifier and subwoofer connectors for the following:
- Proper connection
- Damage
- Disconnected or loose terminals
Is the inspection result normal?
YES: GO TO 2
NO: Repair the terminals or connectors.
- CHECK SUBWOOFER SIGNAL CIRCUIT CONTINUITY
- Disconnect audio amplifier connector B158 and subwoofer connector.
- Check continuity between audio amplifier connector B158 and subwoofer connector.
Audio amplifier Subwoofer Continuity Connector Terminal Connector Terminal B158 2 B72 1 Yes 18 2 3 3 19 4 - Check continuity between audio amplifier connector B158 and ground.
Audio amplifier Ground Continuity Connector Terminal B158 2 - No 18 3 19 Is the inspection result normal?
YES: GO TO 3
NO: Repair or replace harness or connectors.
- CHECK SUBWOOFER SIGNAL
- Connect audio amplifier connector B158 and subwoofer connector.
- Turn ignition switch to ACC.
- Push AV control unit POWER switch.
- Check signal between the terminals of audio amplifier connector B158.
Audio amplifier connector B158 Condition Reference value (+) (-) Terminal Terminal 2 18 Audio signal output 3 19 Is the inspection result normal?
YES: Replace subwoofer. Refer to "REMOVAL AND INSTALLATION ".
NO: GO TO 4.
- CHECK PRE-AMP SIGNAL CIRCUIT CONTINUITY
- Disconnect AV control unit connector M96 and audio amplifier connector B159.
- Check continuity between AV control unit connector M96 and audio amplifier connector B159.
AV control unit Audio amplifier Continuity Connector Terminal Connector Terminal M96 4 B159 24 Yes 5 8 13 23 14 7 - Check continuity between AV control unit connector M96 and ground.
AV control unit Ground Continuity Connector Terminal M96 4 - No 5 13 14 Is the inspection result normal?
YES: GO TO 5.
NO: Repair or replace harness or connectors.
- CHECK PRE-AMP SIGNAL
- Connect AV control unit connector M96 and audio amplifier connector B159.
- Turn ignition switch to ACC.
- Push AV control unit POWER switch.
- Check signal between the terminals of AV control unit connector M96.
AV control unit connector M96 Condition Reference value (+) (-) Terminal Terminal 4 5 Audio signal output 13 14 Is the inspection result normal?
YES: Replace audio amplifier. Refer to "REMOVAL AND INSTALLATION ".
NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".