Diagnostic Procedure
WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to VERIFICATION TESTS
for appropriate verification test procedures.
- Verify that the coolant level is at the correct level per service information.
Start the engine.
With the DRBIII® in Sensors, read the ECT Sensor temperature value.
Use a DVOM that has thermal sensing probe to monitor the Coolant temperature at the Thermostat housing.
The thermostat housing area should be approximately 192-195°F (89-91°C) when the Thermostat begins to open.
Is the DRBIII® reading cooler than the DVOM reading?
- Yes --> Replace the ECT Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 2 .
- No --> Go To 2
- Yes --> Replace the ECT Sensor.
- Start the engine.
With the DRBIII®, set the engine RPM to 1500 and allow the engine to warm up for 10-15 minutes.
With the DRBIII®, monitor the ENG COOLANT TMP DEG value during the warm up cycle. Make sure the transition of temperature change is smooth.
Did the engine temperature reach a minimum of 80° C (176° F)?
- Yes --> Test Complete.
- No --> Refer to the
Service information for cooling system performance diagnosis. The most probable cause is a Thermostat problem. Also, refer to any related TSBs.
Perform POWERTRAIN VERIFICATION TEST VER - 2 .
NOTE:
The best way to diagnose this DTC is to allow the vehicle to remain outside overnight in order to have a completely cold soaked engine.
NOTE:
Extremely cold outside ambient temperatures may cause this DTC to set.
NOTE:
The best way to diagnose this DTC is to allow the vehicle to remain outside overnight in order to have a completely cold soaked engine.