Diagnosis And Testing - Amplifier

Any diagnosis of the Audio system should begin with duplicating the customer concern (verify the problem), include checking for applicable Technical Service Bulletins (TSB) and the use of a diagnostic scan tool. Check for any Diagnostic Trouble Code (DTC) data. If a DTC is found, refer to  DIAGNOSTIC CODE INDEX  and perform the appropriate diagnostic procedure before proceeding in this service information. Refer to the appropriate wiring information. 

The amplifier unit should be checked if there is no sound output noted from the speakers. For diagnosis of the power amplifier. Refer to DIAGNOSIS AND TESTING - SPEAKER .