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 REAR SONAR SENSOR LH INNER CIRCUIT CONTINUITY
- Turn ignition switch OFF.
- Disconnect sonar control unit connector and rear sonar sensor LH inner connector.
- Check continuity between sonar control unit connector M70 and rear sonar sensor LH inner connector B457.
Sonar control unit Rear sonar sensor LH inner Continuity Connector Terminal Connector Terminal M70 21 B457 2 Yes 14 1 - Check continuity between sonar control unit connector M70 and ground.
Sonar control unit Ground Continuity Connector Terminal M70 21 - No
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Repair or replace harness or connectors.
- CHECK REAR SONAR SENSOR LH INNER SIGNAL CIRCUIT SHORT TO BATTERY
- Turn ignition switch ON.
- Check voltage between sonar control unit connector M70 and ground.
Sonar control unit Ground Voltage
(Approx.)Connector Terminal M70 21 - 0V
Is the inspection result normal?
YES
Replace rear sonar sensor LH inner. Refer to REMOVAL AND INSTALLATION .
NO
Repair or replace harness or connectors.