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CU GSM / U1500 08

Read the instructions below then start the fault diagnostic procedure.

Symptom: No phone function.

  U1500 08


Failed start-up of phone unit in CU

Fault symptom

No phone function.

On-board diagnosis

Enable criteria:

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

Fault criteria:

Control module on-board diagnostics has detected an internal communication fault.

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"