3.2.289. SPN 520219, FMI 31, ECU internal fault 0112ΒΆ
Description
The fault is related to the monitoring concept of the redundant shut off paths:
This is a very low level safety function in the ECU hardware made to ensure that the ECU can control the fuel injectors immediately. The function is executed at the beginning of each driving cycle. In case of the fault, the function could not be executed due to a faulty injector or wrong ECU settings.
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 injector solenoid valve wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
- 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.