2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction
none
2E98
2E98 - U1132
Information saved in
DME
Fault code
2E98 - U1132
Fault text
Generator, communication
Fault description
Lost Communication With Generator via BSD (Bit Serial Data Interface)
Condition for fault identification
Test condition:
Alternator communications monitor Terminal condition: Terminal 15 ON Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry Commercial vehicle >350 rpm, No communications fault
Action in service
Check wire (BSD_BUS) connecting alternator and DME.
Check plug-in connection at alternator.
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.
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