4.2.111. SPN 3363, FMI 3, DEF tank heater coolant valve solenoid short circuit to high SOURCEΒΆ

Description

The EEM4 monitoring system has detected a short circuit on the DEF tank heater coolant valve solenoid.

Possible causes are:

  • The solenoid valve wiring is defective (Shorted to high source.)
  • The solenoid valve is defective

Reaction in EEM

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

NOTE: The present fault is classified as an emission related fault. Engine power will be reduced after a certain time defined by an authority.

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).
  • Check the operation with another tank coolant valve to see if the valve is defective.