E20E4

Implausible signal from component S9/1 (Stop lamp switch)

Test 1: Check component S9/1 (Stop lamp switch).

Test 2: Possible cause:

- S9/1 (Stop lamp switch)
Affected functions:

- Electronic stability program ESP

1. Check component S9/1 (Stop lamp switch).
Test sequence

- Switch on ignition.
Status of relevant actual value:
- S9/1 (Stop lamp switch):Warning!
Specified value

- Switch S9/1 (Stop lamp switch) operated:ON
- Switch S9/1 (Stop lamp switch) not operated:OFF
The actual value is supplied through CAN bus from component N47-5 (ESP control unit).Question

- Is the actual value o.k.?


YES
The actual value is okay.End of test

NO
The actual value is not o.k.Possible cause and remedy

- Read fault memory from control unit ABR and rectify faults.
End of test

2. No further information available.