2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 219
Information saved in
DME
Fault code
2ECC – U1132
Fault text
Generator, communication
Fault description
Lost Communication With Generator via BSD (Bit Serial
Data Interface)
Condition for fault identification
Test condition:
Commercial vehicle >350 rpm,
No communications fault
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
25 sec.
Action in service
1. Check wire (BSD_BUS) connecting alternator and DME.
2. Check plug-in connection at alternator.
3. Replace alternator.
Fault effect and breakdown warning
Driver information
Warning light:
No warning message. The alternator responds to loss of the
BSD_BUS signal by charging at a constant 14.4 V battery.
Service instruction
none
2ECD
2ECD – P0620
Information saved in
DME
Fault code
2ECD – P0620
Fault text
Generator, electric
Fault description
Generator Control Circuit
Condition for fault identification
Test condition:
Commercial vehicle > 350 rpm, no BSD communications
fault
Terminal condition: Terminal 15 ON, no BSD fault
Voltage condition:
System voltage
Condition for fault memory entry
25 sec.
Action in service
With confirmation from restart
==> Replace alternator
