Massey Ferguson E3363.05 – AGCO SISU POWER EEM4: The DEF Tank Heater Solenoid Valve Low Amps
Issue description
The engine control module has detected that the electrical current in the DEF tank heater coolant valve circuit is lower than expected, or that the circuit is completely open. This condition prevents the DEF tank heater from operating properly, which can affect DEF injection and emissions control, especially in cold weather.
Applies to these machines
54 machines- 7616
- 5612
- 7622
- Interim Tier 4 (2012-2015)
- 7614
- 5611
- 7615
- 5610
- 5613
- 7620
- 5609
- 7618
- 5608
- 7619
- 7626
- 7624
- MF 4707
- MF 4708
- MF 4709
- MF 4710
- MF 5608
- MF 5609
- MF 5610
- MF 5611
- MF 5612
- MF 5613
- MF 5710 SL
- MF 5711 SL
- MF 5712 SL
- MF 5713 SL
- MF 7614
- MF 7615
- MF 7616
- MF 7618
- MF 7619
- MF 7620
- MF 7622
- MF 7624
- MF 7626
- MF 7714
- MF 7715
- MF 7716
- MF 7716S
- MF 7718
- MF 7718S
- MF 7719
- MF 7720
- MF 7720S
- MF 7722
- MF 7722S
- MF 7724
- MF 7724S
- MF 7726
- MF 7726S
Check the cause
Inspect the DEF tank heater coolant valve (sometimes referred to as the dosing valve) and its wiring harness for obvious physical damage, corrosion, or disconnected plugs.
Check for open or damaged wiring in the valve circuit between the valve and the EEM4 controller.
Ensure all electrical connections at the valve and the ECU are clean, tight, and secure.
Use a multimeter to test the DEF tank heater coolant valve solenoid for continuity. If the solenoid tests as an open circuit (infinite resistance), the valve itself has failed internally.
Repair steps
Repair Wiring
If the diagnostic checks reveal broken wires, chafing, or corroded pins in the connector, repair or replace the damaged wiring harness/connectors.
Replace Valve
If the wiring is intact but the solenoid has an open circuit, remove and replace the DEF tank heater coolant valve.
Clear Codes
Reconnect all components, turn on the machine, and use a diagnostic service tool to clear the E3363.05 / SPN 3363 FMI 5 fault code from the EEM4 controller.
Verify Operation
Run the engine and verify that the DEF injection and heating system operates normally without the code returning.
Parts you might need
(3)DEF Tank Heater Coolant Valve Solenoid (or DEF Dosing Valve)
A specific AGCO/Massey Ferguson part number for the valve itself was not explicitly published in the available search results. You will need to look up the exact DEF coolant valve part number in the AGCO parts catalog using the specific tractor's serial number.
AGCO Power Supply Module (12V)
8370 7377012V AGCO Power Supply Module for the EEM4 system.
AGCO Power Supply Module (24V)
8370 7377124V AGCO Power Supply Module for the EEM4 system.
Get help to fix this fault by requesting a quote
