2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0686
2ACB – P0686
Information saved in
DME
Fault code
2ACB – P0686
Fault text
DME master relay, activation
Fault description
ECM/PCM Power Relay Control Circuit Low
Condition for fault identification
Test condition:
Main relay monitoring
Main relay must have opened.
Terminal condition: First Terminal 15 OFF
(wait until main relay opens)
then Terminal 15 ON
(and leave ON)
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
none
Action in service
1 Check wiring
Repair if defective
If wiring is OK proceed
to check component
Fault effect and breakdown warning
