2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 239
is defective and must be replaced. Repeat test.
2. If fault code is entered again after QLT replacement: ->
Check wiring harness (BSD_BUS) and all plug-in
connections for corrosion and shorts to ground/UBatt.
3. If fault code no longer appears after QLT replacement: ->
QLT was defective.
4. If no fault code is stored after all components (except
QLT, as in 1.) are disconnected: -> The fault lies with one of
the other BSD_components. Now connect the water pump
and clear all fault memories, ignition off/on.
5. If no fault code is entered now, with the water pumpand
QLT connected -> Connect alternator.
6. If no fault code is stored with water pump, QLT and
alternator connected -> Connect battery sensor.
7. If the system now operates with all BSD components, and
no fault has been detected, recheck the plug connections in
the wiring harness and at the components for good contact /
corrosion.
Fault effect and breakdown warning
Driver information
Warning light:
No oil level display/no oil temperature display available.
Service interval calculations for next visit are based on
model. Water pump runs at 100 % cooling capacity and
draws continuous current of approximately 15A.
Power management fails to operate correctly because it is
not possible to read battery sensor.
Service instruction
none
2E8B – P150A (DME)
2E8B – P150A
Information saved in
DME
Fault code
2E8B – P150A
Fault text
Intelligent battery sensor, signal
Fault description
Battery Sensor BSD (Bit Serial Data Interface) Extended
Communication Circuit
Condition for fault identification
Test condition:
IBS: Interference with extended communications on BSD
bus
Terminal condition: none
Voltage condition:
none
Condition for fault memory entry
10 sec.
Action in service
1. Check BSD wire for sporadic shorts to battery voltage
and ground
2. Check for intermittent contacts
3. Systematically disconnect other BSD components one
after the other and replace as indicated
4. If fault persists after clearing fault memory, replace
battery sensor
5. If fault memory entry is logged repeatedly, replace battery
