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AV TWEETER AV-459 < DTC/CIRCUIT DIAGNOSIS > [NAVIGATION WITH BOSE] C D E F G H I J K L M B A O P TWEETER Diagnosis Procedure INFOID:0000000010122690 Regarding Wiring Diagram information, refer to . 1. CONNECTOR CHECK Check the AV control unit, BOSE speaker amp. and speaker connectors for the following: • Proper connection • Damage • Disconnected or loose terminals YES >> GO TO 2. NO >> Repair the terminals or connectors. 2. CHECK TWEETER SIGNAL CIRCUIT CONTINUITY 1. Disconnect BOSE speaker amp. connector B20 and suspect tweeter connector. 2. Check continuity between BOSE speaker amp. connector B20 and suspect tweeter connector. 3. Check continuity between BOSE speaker amp. connector B20 and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace harness or connectors. 3. CHECK TWEETER SIGNAL 1. Connect BOSE speaker amp. connector B20 and suspect tweeter connector. 2. Turn power switch to ACC. 3. Push AV control unit POWER switch. 4. Check the signal between the terminals of BOSE speaker amp. connector B20. BOSE speaker amp. Tweeter Continuity Connector Terminal Connector Terminal B20 13 M15 (LH) 1 Yes 12 2 15 M525 (RH) 1 14 2 BOSE speaker amp. Ground Continuity Connector Terminal B20 13 — No 12 15 14 BOSE speaker amp. connector B20 Condition Reference value (+) ( −) Terminal Terminal |