2E98 - U1132

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.