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AV INSTRUMENT PANEL SPEAKER/TWEETER AV-315 < DTC/CIRCUIT DIAGNOSIS > [MID AUDIO WITH BOSE] C D E F G H I J K L M B A O P Is the inspection result normal? YES >> Replace instrument panel tweeter. Refer to AV-375, "Removal and Installation" NO >> GO TO 4. 4. CHECK PRE-AMP SIGNAL CIRCUIT CONTINUITY 1. Disconnect AV control unit connector M143 and BOSE speaker amp. connector B130. 2. Check continuity between AV control unit connector M143 and BOSE speaker amp. connector B130. 3. Check continuity between AV control unit connector M143 and ground. Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace harness or connectors. 5. CHECK PRE-AMP SIGNAL 1. Connect AV control unit connector M143 and BOSE speaker amp. connector B130. 2. Turn ignition switch to ACC. 3. Push AV control unit POWER switch. 4. Check signal between the terminals of AV control unit connector M143. Is the inspection result normal? YES >> Replace BOSE speaker amp. Refer to AV-372, "Removal and Installation" 41 42 Audio signal output 45 46 SKIB3609E AV control unit BOSE speaker amp. Continuity Connector Terminal Connector Terminal M143 113 B130 75 Yes 119 76 109 73 115 74 AV control unit Ground Continuity Connector Terminal M143 113 — No 119 109 115 AV control unit connector M143 Condition Reference value (+) ( −) Terminal Terminal 113 119 Audio signal output 109 115 SKIB3609E |