1B2104

1B2104 - P1661

Information saved in
DME

Fault code
1B2104 - P1661

Fault text
Interface EWS-DME: timeout

Fault description
The diagnostic function monitors the electronic immobilizer
messages.

Condition for fault identification
Test condition:
The fault is registered when a time limit violation is
detected.
Potential problem source(s):
- Defective wiring harness
- 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
- Check wiring harness between CAS and DME
- 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