Diagnostic Test
WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- COOLING SYSTEM FAILURE NOTE:
If other cooling system DTCs are present, repair those DTCs before proceeding.
- Check the engine cooling system operation. Refer to DIAGNOSIS AND TESTING
.
Is the Cooling system operating normally?
Yes
- Go To 2
No
- Repair the cooling system failure.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
- Check the engine cooling system operation. Refer to DIAGNOSIS AND TESTING
.
- CHECK THE ECT SENSOR
- Allow the engine to reach normal operating temperature.
- Use a temperature probe and measure the engine temperature near the ECT Sensor.
- With the scan tool, read the Engine Coolant Temperature.
- Compare the temperature probe reading with the scan tool reading.
Are the readings within 10°F of each other?
Yes
- Repair the cause of mechanical failure.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
No
- Replace the Engine Coolant Temperature Sensor in accordance with the Service Information. Refer to SENSOR, COOLANT TEMPERATURE, REMOVAL .
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .