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Home >> BMW >> 2013 >> Alpina B7 >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - Diagnostic Trouble Codes - DTC P14C0 - DTC U1179 (N63 & S63) >> Diagnostic Trouble Codes (DTCS) MSD85 - Bn2020 >> DTC P0686, BMW Hex Code 0x1F0502, BMW Code 2032898: ECM/PCM Power Relay Control Circuit Low >> Monitoring criteria

Monitoring criteria

E7X: the DME main relay's contacts fail to close within a specified period after Terminal 15 is energized. F01: The fault is recognized when no voltage is present at the DME within a specific period after Terminal 15 is energized.

Potential problem source(s): E7X:

-The control-activation wire to the DME main relay has a short circuit to positive or is open

-Defective DME main relay