3.2.19. SPN 1076, FMI 14, MPROP control, Open circuitΒΆ

Description

The EEM4 system has detected an open circuit on the high pressure pump control (MPROP).

Possible causes are:

  • The solenoid valve connector is defective.
  • The solenoid valve wiring is defective.
  • The solenoid valve is defective.

Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates active fault.

Solution

First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:

  • Check the solenoid valve wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
  • Measure between the low side from the MPROP connector to the ECU connector pin, to see if there is a fault cable.
  • Check the operation with another MPROP solenoid valve to see if the solenoid valve is defective.

See Common Rail high Pressure Pump (MPROP) for reference.