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Relay assignment, engine wiring harness on engines BMW M40, M42, M43, M43TU, M44, M50, M52, M52TU, S52, S50US

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Before removing the relays:
Read fault memory of DME control unit.
Switch off ignition.

Unfasten and remove cover.

Installation location:

  1. Relay for oxygen-sensor heating
  2. Master relay for Digital Motor Electronics (DME)
  3. Relay for electric fuel pump (EKP)


Read fault memory of DME control unit, check faults in memory, then cancel fault memory.

This post was last modified on July 26, 2017 8:15 am

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