P1661

1B2104 - P1661

Information saved in
DME

Fault code
1B2104 - P1661

Fault text
Interface EWS-DME: timeout

Fault description
The diagnostic function monitors whether CAS bus
communications include errors related to the EWS
electronic immobilizer telegrams.

Condition for fault identification
Test condition:
The fault is registered when a time limit violation is detected
during transmission of a telegram.
Potential problem source(s):
- Wiring harness defect, wire D_EWS
- Defective CAS
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- None
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
E7X: This fault is logged in the control module's fault
memory if it remains present for longer than 30 sec.
F01: This fault is logged in the control module's fault
memory if it remains present for longer than 90 sec.

Action in service
- Check D_EWS wire

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- In extreme cases starter turns but engine fails to start

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

Service instruction
- none