U1190

231F04 - U1190

Information saved in
DME

Fault code
231F04 - U1190

Fault text
EGS, PT-CAN, PT-CAN2: communication fault

Fault description
The diagnostic function monitors whether both
communications paths (PT-CAN2 / PT-CAN) between
transmission and engine-management ECU are subject to
interference, meaning that redundancy is not present.

Condition for fault identification
Test condition:
The fault is recognized when communications with the EGS
electronic gearbox control on the A and PT CAN break
down.
Potential problem source(s):
- Interference in communications to EGS via A and PT CAN
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- None
Time condition:
- 750 sec.
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the control module's fault memory if
it remains present for longer than 0.03 sec.

Action in service
- Carry out system analysis.

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- Transmission in emergency program

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

Service instruction
- none