Horizontal Synchronizing (HP) Signal Circuit

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, With Color Display Without Navigation System Bose Audio.

1. CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT






1.Turn ignition switch OFF.
2.Disconnect display unit connector M141 and AV control unit connector M154.
3.Check continuity between display unit harness connector M141
(A) terminal 8 and AV control unit harness connector M154 (B)
terminal 45.





4.Check continuity between display unit harness connector M141
(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 M141 and AV control unit connector M154.
2.Turn ignition switch ON.
3.Check signal between display unit harness connector M141 terminal 8 and ground.





Are voltage readings as specified?
YES- Replace AV control unit. With Color Display.
NO- Replace display unit. With Color Display.