Monday, April 13, 2020

2010-2020 BMW 128i Diagnostic and Repair Information

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

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.