4.2.23. SPN 1077, FMI 3, ECU internal fault 0101ΒΆ

Description

The EEM4 monitoring system has detected an internal failure on the high pressure unit control (MPROP). A possible reason for this is an ECU hardware defect.

Reaction in EEM

The FC is stored and the warning lamp is activated. Engine power will be reduced (Degradation Level 1). The CAN message indicates active fault. Engine functions dependent on the fuel temperature are not active.

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 ECU operation with another EEM4 controller. If the system is functional and the fault is not active with the replacement ECU, then the original ECU is defective.