Bose Audio Without Navigation

HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT





Description
In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizontal synchronizing (HP) signal from display unit to AV control unit so as to synchronize the RGB images displayed with AV control unit such as the image quality adjusting menu, etc.




Diagnosis Procedure
Regarding Wiring Diagram information, Bose Audio Without Navigation.
1.CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit connector M171.
3. Check continuity between display unit harness connector M93
(A) terminal 8 and AV control unit harness connector M171 (B) terminal 45.





4. Check continuity between display unit harness connector M93
(A) terminal 8 and ground.





Are continuity results as specified?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK HORIZONTAL SYNCHRONIZING (HP) SIGNAL





1. Connect display unit connector M93 and AV control unit connector M171.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 terminal 8 and ground.






Are voltage readings as specified?
YES - Replace AV control unit. Removal And Installation Bose Audio Without Navigation.
NO - Replace display unit. Removal And Installation Bose Audio Without Navigation.