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3. Check Rear View Control Unit Synchro Signal

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Connect rear view camera control unit connector and display connector.
Turn ignition switch ON.
Check voltage signal between rear view camera control unit harness connector B236 terminal 22 (PU) and ground.

Fig 1: Check Rear View Control Unit Synchro Signal
Courtesy of NISSAN MOTOR CO., U.S.A.

22 (PU) - Ground Refer to TERMINALS & REFERENCE VALUE FOR REAR VIEW CAMERA CONTROL UNIT .

OK or NG

OK: Replace rear view camera control unit.
NG: Replace display.