U1000

Read the instructions below then start the fault diagnostic procedure.

Symptom: The LED on the control button unit shows a red light. or no LED indication on the control button unit.

U1000

Fault symptoms

•	The LED on the control button unit shows a red light. or

•	no LED indication on the control button unit.

On-Board Diagnosis

Type of diagnosis:

-	Once every driving cycle

Enabling criteria:

-	Ignition ON

-	U1300 or U1301 must not be active

Fault criteria:

-	No communication between VCIM for more than 15s.

Checking the wiring harness

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.

Diagnostic help

The present fault code is erased directly the fault ceases. The historical fault codes are erased after 50 fault free driving cycles.