M11 Plus Series Engines Operation and Maintenance Manual – Coolant Temperature Below Normal

Electronic fault codes active or high counts of inactive fault codes

Refer to Procedure 101-007 (Electronic Controlled Fuel System) in Section 1 for fault code troubleshooting.

Engine is operating at low ambient temperature

Check the shutters and engine compartment air. Refer to Procedure 101-015 (Operating the Engine) in Section 1.

Radiator shutters are stuck open or opening early

Check the shutter operation. Repair or replace the shutters if necessary. Refer to the OEM service manual and Section Procedure 101-015 (Operating the Engine) in Section 1.

Coolant temperature gauge is malfunctioning

Test the temperature gauge. Repair or replace the gauge, if necessary.