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Diagnosis and testing
Cellular Phone Principles of Operation For a detailed description of the Cellular Phone, refer to the relevant Description and Operation sections in the workshop manual. Cellular Phone - VIN Range: G00442->G45703 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 •
Wiring Harness For Damage And Corrosion •
Electrical Connector(s) Loose, Damaged Or Corrosion
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 Telephone Control Module CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00
NOTE:
If the control module/component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation, prior to the installation of a new module/component.
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