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AV-416 < DTC/CIRCUIT DIAGNOSIS > [COLOR DISPLAY - W/ BOSE] REAR DOOR SPEAKER 1. Connect BOSE speaker amp. connectors and suspect speaker connector. 2. Turn ignition switch to ACC. 3. Push POWER switch. 4. Check the signal between BOSE speaker amp. harness connec- tors B109 (A) and B110 (B) terminals with CONSULT or oscillo- scope. Are audio signal voltage readings as specified? YES >> Replace suspect speaker. Refer to . NO >> GO TO 4. 4. HARNESS CHECK 1. Disconnect AV control unit connector M157 and BOSE speaker amp. connector B109. 2. Check continuity between AV control unit harness connector M157 (A) and BOSE speaker amp. harness connector B109 (B). 3. Check continuity between AV control unit harness connector M157 (A) and ground. Are the continuity test results as specified? YES >> GO TO 5. NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector. 5. REAR DOOR SPEAKER SIGNAL CHECK Connector Terminals Condition Reference signal (+) (-) A: B109 28 15 Receive B: B110 14 9 AWNIA1703ZZ SKIA0177E A B Continuity Connector Terminal Connector Terminal M157 112 B109 24 Yes 118 23 108 26 114 25 A — Continuity Connector Terminal M157 112 Ground No 118 108 114 AWNIA1762ZZ |