2.2.156. SPN 3363, FMI 3, DEF tank heater: Coolant valve solenoid low side short circuit to HIGH SOURCE.ΒΆ

Description

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

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 an active fault.

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

Solution

First save the error log and then do the procedure that follows:

  • Examine the solenoid valve wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
  • Try the operation with another DEF tank heater coolant valve to see if the valve is defective.