P0620

210201 - P0620

Information saved in
DME

Fault code
210201 - P0620

Fault text
Alternator, electric: malfunction

Fault description
The diagnostic function monitors whether the alternator is
supplying power.

Condition for fault identification
Test condition:
The fault is recognized by complex self-diagnosis routines
in the regulator and transmitted to the DME via the BSD
bus.
Potential problem source(s):
- Positive wire not correctly connected to battery
- Ground not correctly connected
- Defective regulator
- Alternator defect
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
- Check positive wire for correct installation
- Check ground wire for correct installation
- Check alternator
- Fault frequency = 1: If the IMIB is available, perform an
alternator test / If no IMIB is available, delete stored fault
codes from control module fault memory and do not
perform any other actions Fault frequency > 1: Replace
alternator

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
- Charge indicator lamp lights up
- Breakdown in extreme cases

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: on
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: on

Service instruction
Can occur during vehicle servicing when external power
source is connected, etc.