Diagnosis Procedure
WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect video distributor connector and headrest display unit connector.
- Check continuity between video distributor harness connector and headrest display unit harness connector.CONTINUITY SPECIFICATION
Video distributor Headrest display unit Continuity Connector Terminal Connector Terminal M217 32 B554(1) 24 Existed 28 B574(2) 24 Existed (1) Headrest display unit LH (2) Headrest display unit RH - Check continuity between headrest display unit harness connector and ground.CONTINUITY SPECIFICATION
Headrest display unit Ground Continuity Connector Terminal B554(1) 24 Not existed B574(2) 24 (1) Headrest display unit LH (2) Headrest display unit RH Is the inspection result normal?
YES: Go to 2.
NO: Repair harness or connector.
- CHECK COMPOSITE IMAGE SIGNAL
- Connect video distributor connector and rear display unit connector.
- Turn ignition switch ON.
- Check signal between rear display unit harness connector using an oscilloscope.SIGNAL REFERENCE
(+) (-) Condition Reference value Headrest display unit Connector Terminal B554(1) 24 Ground When DVD, USB or front AUX image is displayed on headrest display unit LH or RH. B574(2) 24 (1) Headrest display unit LH (2) Headrest display unit RH Is the inspection result normal?
YES: Replace headrest display unit. Refer to "EXPLODED VIEW ".
NO: Replace video distributor. Refer to "REMOVAL AND INSTALLATION ".