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AV HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT AV-91 < COMPONENT DIAGNOSIS > [BASE AUDIO AND DISPLAY SYSTEM] C D E F G H I J K L M B A O P HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT Description INFOID:0000000003882749 In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizon- Diagnosis Procedure INFOID:0000000003901211 1. CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect display unit connector and AV control unit connector. 3. Check continuity between display unit harness connector and AV control unit harness connector. 4. Check continuity between display unit harness connector and ground. Is inspection result normal? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK HORIZONTAL SYNCHRONIZING (HP) SIGNAL 1. Connect display unit connector and AV control unit connector. 2. Turn ignition switch ON. 3. Check signal between display unit harness connector terminal and ground using an oscilloscope. Is inspection result normal? YES >> Replace AV control unit. NO >> Replace display unit. Display unit AV control unit Continuity Connector Terminal Connector Terminal M49 8 M129 45 Existed Display unit Ground Continuity Connector Terminal M49 8 Not existed (+) ( − ) Condition Reference value Display unit Connector Terminal M49 8 Ground — SKIB3601E |