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AV-128 < COMPONENT DIAGNOSIS > [PREMIUM AUDIO (CREW CAB)] AMP ON SIGNAL CIRCUIT AMP ON SIGNAL CIRCUIT Description INFOID:0000000005274957 When the audio system is turned on, a voltage signal is supplied from the audio unit to the audio amp. When Diagnosis Procedure INFOID:0000000005274958 Regarding Wiring Diagram information, refer to . 1. CHECK AMP ON SIGNAL 1. Turn audio system ON. 2. Check voltage between audio amp. harness connector B159 ter- Is battery voltage present? YES >> Inspection End. NO >> GO TO 2 2. CHECK AMP ON SIGNAL (AUDIO UNIT) Check voltage between audio unit harness connector M66 terminal Is battery voltage present? YES >> Repair harness or connector. NO >> Replace audio unit. Refer to 9 - Ground : More than 6.5V ALNIA0733GB 12 - Ground : More than 6.5V ALNIA0734GB |