U1171

20AB08 - U1171

Information saved in
DME

Fault code
20AB08 - U1171

Fault text
Coolant pump, emergency operation input: No voltage

Fault description
The diagnostic function monitors the voltage level at the
water pump's emergency default input terminal (Pin 1).

Condition for fault identification
Test condition:
The fault is recognized when no voltage is present at pin 1
(emergency default input terminal) for the intercooler water
pump when Terminal 15 is on or voltage is present when
Terminal 15 is off.
Potential problem source(s):
- Defect in wiring harness
- Defective water pump
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- No BSD fault

Condition for fault memory entry
This fault is logged in the control module's fault memory if
it remains present for longer than 25 sec.

Action in service
- Check wiring harness
- Replace water pump

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- none

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