Charging System Inoperative Message with Possible DTCs P0622 , P1637 - charge connector DIC display electrical generator LS65.7 wire

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Charging system inoperative message with possible DTCs P0622, P1637.

Check the generator connector wires and make sure they are not being pulled at a tight right angle or that one of the large underhood harnesses is not on top of the connector. The stress on the generator connector could cause the terminals to pull out or the wire braiding to break. Repair the circuits and move any harnesses so that no stress is placed upon the connector.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(04 Cadillac CTS-V)

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