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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 490 (Powertrain Diagnostic Procedures - Diesel) >> Diagnostic Information And Procedures >> DRIVEABILITY - Diesel - Symptoms >> Symptom: *CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR CALIBRATION >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR CALIBRATION

TEST ACTION APPLICABILITY
1
NOTE: The thermostat must be operating correctly for this test to be valid.
With the DRBIII® in Sensors, read and note the engine coolant temperature. Using a temperature probe, measure the engine block temperature near the ECT Sensor.
NOTE: The engine temperature should be below 50°C (120°F).
Are the readings within 7°C (13°F) of each other?Yes --> Go To 2No --> Replace the Engine Coolant Temperature Sensor.Perform ROAD TEST VERIFICATION - VER-2 .		 All
2
NOTE: The thermostat must be operating correctly for this test to be valid.
Start the engine and bring the engine to operating temperature (thermostat open). Turn the engine off and wait 10 minutes to allow the engine temperature to stabilize. Using a temperature probe, measure the engine block temperature near the ECT Sensor.With the DRBIII®, select Engine, then Sensors and read the engine coolant temperature.Are the readings within 7°C (13°F) of each other?Yes --> Test Complete.No --> Replace the Engine Coolant Temperature Sensor.Perform ROAD TEST VERIFICATION - VER-2 .		 All
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