Engine Controls System: 210401

210401 - P0A3B

Information saved in
DME

Fault code
210401 - P0A3B

Fault text
Alternator, temperature: overtemperature

Fault description
The diagnostic function monitors the alternator temperature.

Condition for fault identification
Test condition:
The fault is recognized by temperature measurement in the
regulator and transmitted to the DME via the BSD bus.
Potential problem source(s):
- Alternator dirty
- Airflow to alternator obstructed
- Thermal overload from unfavorable driving profile
possible
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine on
- Alternator not fully loaded

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 1 min.

Action in service
- Inspect alternator for unobstructed air current
- If the IMIB is available, perform an alternator test
- If no IMIB is available, delete stored fault codes from
control module fault memory and take no further action

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
Reduction in availability of comfort and convenience
accessories

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
If no other faults related to the alternator have been logged,
do not replace the alternator.
This fault only indicates that the alternator's thermal
protection function has assumed active status in response to
excessive component temperature.
This is not a case of a defective component.