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Diagnosis and testing
Audio System Principles of Operation For a detailed description of the Audio system, refer to the relevant Description and Operation sections in the workshop manual. Audio System Audio System - VIN Range: H18680->H99999 Audio System Antenna Speakers Speakers Inspection and Verification 1 . Verify the customer concern.
2 . Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Chart Electrical
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Fuses/Relays •
Damaged, Loose or Corroded Connector(s) •
Damage to Wiring Loom/Incorrect Location, Stretched or Taught
1 . If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
2 . If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index. DTC Index Gateway module CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00
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