U1166

1B2302 - U1166

Information saved in
DME

Fault code
1B2302 - U1166

Fault text
Message, EWS-DME, incorrect: frame fault

Fault description
The diagnostic function monitors communications on the
CAN bus to assess electronic immobilizer messages.

Condition for fault identification
Test condition:
The fault is registered when a message error is present.
Potential problem source(s):
- Defective CAS
- Defective DME
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine off
- Vehicle key recognized and valid for the duration of the
monitoring process

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 3 min.

Action in service
- Replace CAS
- Replace DME

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
In worst case the starter turns but the engine fails to start

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: none
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
None