Nissan Altima 2007-2012 Service Manual: Reverse signal circuit

Description

A reverse signal is supplied from the back-up lamp relay to the rear view camera control unit. When this signal is received, the display shows a view to the rear of the vehicle.

Diagnosis Procedure

1.BACK-UP LAMP INSPECTION

1. Turn ignition switch ON.

2. Shift selector lever to R position.

Does back-up lamp illuminate? YES >> GO TO 2

NO >> Check back-up lamp system. Refer to EXL-4, "Work Flow".

2.CHECK REVERSE POSITION INPUT SIGNAL

Select “DATA MONITOR” of “REARVIEW CAMERA”. Operate ignition switch with “R POSI SIG” of “DATA MONITOR” and check operate status.

1. Turn ignition switch OFF.

2. Disconnect rear view camera control unit connector.

3. Turn ignition switch ON.

4. Shift selector lever to R position.

5. Check voltage between rear view camera control unit harness connector B31 terminal 4 and ground.

Does battery voltage exist? YES >> Inspection End.

NO >> Check harness for open or short between rear view camera control unit and back-up lamp relay.

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