2ACB - P0686

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2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction



none









2ACB - P0686 (DME)



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







Driver information Warning light: none

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