BMW 328i Sedan (E90) L6-3.0L (N51) U Code Charts 35
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
U1134
CDAB - U1134
Information saved in
DME
Fault code
CDAB - U1134
Fault text
Message (lamp status, 21A)
Fault description
Lost Communication With Lamp Status
Condition for fault identification
Test condition:
'Lamp status' message recognized at least once
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
200 sec.
Action in service
Check CAN link between light module and DME
Fault effect and breakdown warning
Driver information
Warning light:
none
Service instruction
none
U1135
CDAC - U1135
