PRE-RELEASE
CU AMPS / B1000 57
Read the instructions below then start the fault diagnostic procedure.
Symptom: "On Star System Malfunction. Contact Service." shown on the display.
| B1000 57 |
Control Module. Internal Fault
Fault symptom
"On Star System Malfunction. Contact Service." shown on the display.On-board diagnosis
Type of diagnosis:
| Continuous |
Enable criteria:
| Ignition ON. |
Fault criteria:
| Internal error. |
Diagnostic help
Replace ECUSee "Procedure for control module replacement"
Check that the following MIs/Campaigns have been carried out before starting fault diagnosis:
US Market
MI No. 391-2394 - Customer Satisfaction Campaign 15421 - Update of OnStar system.
MI No. 391-2409 - Customer Satisfaction Campaign 15424 - 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 15424 - Update of OnStar system.
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" |
