Detroit EPA07 GHG14 Low Engine Coolant Temperature Solution

It is normal problem on engine get low engine coolant temperature problem.So here in this instruction,car-auto-repair.com show you guide on how to solve Detroit EPA07 GHG14 engine low engine coolant temperature.

Preparations:

2024.06 Detroit Diesel Diagnostic Link DDDL 8.20 8.09 Free Download

JPRO DLA+ 2.0 Adapter

NEXIQ USB Link 2 Adapter

 

Procedures:

Check as follows:

Note : In extremely cold ambient temperatures, it may take longer than 20 minutes of driving to reach operating temperature. In these cases, performing a Parked Regeneration is preferred.

Note : Use DiagnosticLink ®  to monitor engine coolant temperature.

 

1 Verify the complaint by driving the vehicle for 20 minutes or performing a Parked Regeneration. Does the engine coolant temperature reach and maintain a minimum of 85°C (185°F)?

1a Yes; the vehicle is performing as intended; no further troubleshooting is required. Shut down the engine.

1b No; shut down the engine. Go to step 2.

Note : If there is no heat in the cab but the engine temperature does rise to normal operating temperature, diagnose the Heating Ventilation and Air Conditioning (HVAC) system.

 

2 Check engine coolant fan operation. Does the fan function and cycle correctly?

2a Yes; Go to step 3.

2b No; diagnose the engine fan operation.

 

3 Inspect the vehicle for aftermarket cooling system components plumbed into the engine cooling system. Are any aftermarket cooling system components present?

3a Yes; Go to step 4.

3b No; Go to step 5.

Note : Use DiagnosticLink ®  to monitor engine coolant temperature.

 

4 Bypass the aftermarket cooling system component and verify the complaint by driving the vehicle for 20 minutes or performing a Parked Regeneration. Does the engine coolant temperature reach and maintain a minimum of 85°C (185°F)?

4a Yes; no further engine troubleshooting is required. Shut down the engine. Troubleshoot the aftermarket cooling system component.

4b No; Go to step 5.

5 Remove the thermostat. Refer to section “Removal of the Engine Coolant Thermostat and Seal” .

 

6 Inspect the thermostat. Refer to section “Inspection of the Coolant Thermostat and Seal” . Is the thermostat faulty or damaged?

6a Yes; replace the thermostat. Refer to section “Removal of the Engine Coolant Thermostat and Seal” . Verify repair.

6b No; review the results of the above troubleshooting steps to see if all results are consistent and accurate. Replace the thermostat. Refer to section “Removal of the Engine Coolant Thermostat and Seal” . Verify repair.

 

More repair cases for Detroit Diesel engines,please refer to:Detroit Diesel Engine Repair