P0703

P0703

Diagnosis information - PSM8, TC/ABS

Brake light switch

Diagnostic conditions
The control unit PSM(TC/ABS) initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.
- Ignition on
- PSM(TC/ABS) control unit internal function test
- Actuate foot brake and then release it again

Possible fault causes
- Adjustment of stop light switch not OK
- Stop light switch mechanism not OK
- Short circuit to B+/open circuit
- Short circuit to ground/open circuit
- Plug connection/wiring faulty