U1000 08 (CU AMPS - OnStar)

U1000 08

GPS Signal Error







Fault symptom
- "On Star System Malfunction. Contact Service." shown on SID.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Ignition ON.
- Battery voltage must be between 9 - 16 V.
- No starter motor cranking.

Fault criteria:
- A memory error has occurred in the GPS module.
- Check that the following MIs/Campaigns have been carried out before starting fault diagnosis:

US Market
- MI No. 391-2394 - Customer Satisfaction Campaign 1542 1 - Update of OnStar system.
- MI No. 391-2409 - Customer Satisfaction Campaign 1542 4 - Update of OnStar system.

CA Market
- MI No. 391-2410 - Customer Satisfaction Campaign 15421 - Update of OnStar system.
- MI No. 391-2408 - Customer Satisfaction Campaign 1542 4 - Update of OnStar system.

Diagnostic help
- Change the control module.
- See "Before changing a control module".

Diagnostic help

Diagnosis regards:
- To locate electrical faults in the control module internal electronics.

Functions in the diagnostic tool related to the fault:
- See menu "All - Add/Remove"