P0571

1B6008 - P0571

Information saved in
DME

Fault code
1B6008 - P0571

Fault text
Brake-light switch, plausibility: signal implausible

Fault description
The diagnostic function monitors the plausibility of the
brake light switch

Condition for fault identification
Test condition:
The fault is recognized when the status of the brake light
switch does not correspond to that of the brake light test
switch.
Potential problem source(s):
- Defective wiring harness
- Brake light switch defective
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- 2 min. continuous open circuit at both switches (brake light
switch and brake light test switch)
Other conditions:
- Multiple brake applications

Condition for fault memory entry
This fault code is logged in the control module's fault
memory when it remains present for longer than 2 sec.

Action in service
- Check wiring harness between DME and brake light
switch
- Replace brake light switch
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
CC message

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: on
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: on

Service instruction
None