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AV-328 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITH NAVIGATION] DOOR SPEAKER (COUPE) 1. Connect BOSE speaker amp. connector B121 and suspect speaker connector. 2. Turn ignition switch to ACC. 3. Push “POWER” switch. 4. Check the signal between BOSE speaker amp. harness connec- tor B121 terminals with CONSULT-III or oscilloscope. Is audio signal voltage as specified? YES >> Replace suspect speaker. Refer to . NO >> GO TO 3 3. HARNESS CHECK 1. Disconnect AV control unit connector M47 and BOSE speaker amp. connector B121. 2. Check continuity between audio unit harness connector M47 (A) and BOSE speaker amp. harness connector B121 (B). 3. Check continuity between AV control unit harness connector M47 (A) and ground. Are continuity test results as specified? YES >> GO TO 4 NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector. 4. DOOR SPEAKER SIGNAL CHECK Connec- tor Terminal Condition Reference signal (+) (-) B121 58 59 Receive 71 72 ALNIA0135ZZ SKIA0177E A B Continuity Connector Terminal Connector Terminal M47 2 B121 75 Yes 3 76 11 73 12 74 A — Continuity Connector Terminal M47 2 Ground No 3 11 12 ALNIA0136ZZ |