20A802

20A802 - P15D2

Information saved in
DME

Fault code
20A802 - P15D2

Fault text
Coolant pump, shutdown: Overvoltage detected

Fault description
The diagnostic function monitors the voltage of the
electronics.

Condition for fault identification
Test condition:
The fault is recognized when the water pump has responded
to measured overvoltage (> 20.5 V) by deactivating itself.
Potential problem source(s):
- Systematic fault in vehicle, for instance, jump start with
24 V
- Intercooler water pump defective
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 10 sec.

Action in service
- When the logged diagnostic fault codes indicate
overvoltage at multiple control modules then a systematic
fault is present in the vehicle
- If only the diagnostic fault code for the intercooler water
pump is stored then the problem lies with the power-supply
voltage
- Replace intercooler water pump

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

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