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AV-136 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITHOUT NAVIGATION] SUBWOOFER (COUPE) 1. Connect audio unit connector M43 and BOSE speaker amp. connector B121. 2. Turn ignition switch to ACC. 3. Push “POWER” switch. 4. Check the signal between audio unit harness connector M43 terminals with CONSULT-III or oscilloscope. Is the audio signal voltage as specified? YES >> Replace BOSE speaker amp. Refer to "Removal and Installation - Coupe" . NO >> Replace audio unit. Refer to Connector Terminals Condition Reference signal (+) (-) M43 4 5 Receive 13 14 AWNIA0034ZZ SKIA0177E |