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AV-376 < DTC/CIRCUIT DIAGNOSIS > [NAVIGATION WITH BOSE] FRONT TWEETER Is the inspection result normal? YES >> Replace front tweeter. Refer to AV-407, "Removal and Installation" NO >> GO TO 4 4. CHECK FRONT SPEAKER SIGNAL CIRCUIT CONTINUITY (AV CONTROL UNIT) 1. Turn ignition switch to OFF. 2. Disconnect Bose speaker amp. connector B43 and AV control unit connector M100. 3. Check continuity between Bose speaker amp. connector B43 and AV control unit connector M100. 4. Check continuity between Bose speaker amp. connector B43 and ground. Is the inspection result normal? YES >> GO TO 5 NO >> Repair or replace harness or connectors. 5. CHECK FRONT SPEAKER SIGNAL (AV CONTROL UNIT) 1. Connect Bose speaker amp. connector B43 and AV control unit connector M100. 2. Turn ignition switch to ACC. 3. Push AV control unit POWER switch. 4. Check signal between AV control unit connector M100 and ground. Is the inspection result normal? 37 36 Audio signal output 34 35 SKIB3609E Bose speaker amp. AV control unit Continuity Connector Terminal Connector Terminal B43 2 M100 3 Yes 3 2 4 12 5 11 Bose speaker amp. Ground Continuity Connector Terminal B43 2 — No 3 4 5 AV control unit connector M100 Condition Reference value (+) ( −) Terminal Terminal 2 3 Audio signal output 11 12 SKIB3609E |