C3 Check ECU

- Key OFF.

- Reconnect and reassemble all components.

- Install NGS Tester.

- Key ON. Clear codes.Clearing Trouble Codes

- Key OFF.

- Key ON, pull codes. Reading and Clearing Diagnostic Trouble Codes

- Is System Pass obtained?

YES -- Service charging system for intermittent over-voltage condition.

NO -- DTC B1317 is present. Replace ECU. A new code is present. Go to the appropriate pinpoint test. Diagnostic Trouble Code Descriptions