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AV U1243 DISPLAY UNIT AV-45 < COMPONENT DIAGNOSIS > [BASE AUDIO WITHOUT NAVIGATION] C D E F G H I J K L M B A O P U1243 DISPLAY UNIT Description INFOID:0000000003508385 DTC Logic INFOID:0000000003508386 Diagnosis Procedure INFOID:0000000003508387 1. CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT Check display unit power supply and ground circuits. Refer to AV-51, "DISPLAY UNIT : Diagnosis Procedure" . Is the inspection result normal? YES >> GO TO 2. NO >> Repair malfunctioning parts. 2. CHECK CONTINUITY COMMUNICATION 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 the inspection result normal? YES >> GO TO 3. NO >> Repair harness or connector. 3. CHECK COMMUNICATION SIGNAL (CONT → DISP) 1. Connect display unit connector and AV control unit connector. 2. Turn ignition switch ON. 3. Check signal between display unit harness connector and ground. Part name Description DISPLAY UNIT • Display image is controlled by the serial communication from AV control unit. AV control unit and the auxiliary image signal from the auxiliary input jacks. • Outputs the synchronizing signals (HP and VP) to the AV control unit. DTC Display contents of CONSULT-III DTC Detection Condition Possible causes U1243 FRONT DISP CONN When either one of the following items is detected: • Display unit power supply and ground circuits malfunc- tion is detected. • Malfunction is detected in communication circuits be- tween AV control unit and display unit. • Display unit power supply and ground circuits. • Communication circuits between AV control unit and display unit. Display unit AV control unit Continuity Connector Terminals Connector Terminals M71 11 M83 56 Existed 22 44 Display unit Ground Continuity Connector Terminals M71 11 Not existed 22 |