Diagnostic Test

1) ACTIVE DTC
NOTE: Improper installation of a block heater could cause this DTC to set.

NOTE: Review Freeze Frame data. Extremely cold ambient temperatures may cause this DTC to set.

NOTE: Diagnose and repair any ECT sensor circuit or temperature sensor performance DTCs before continuing with this test.

NOTE: Inspect the cooling system for any conditions that can cause a change in engine warm up time, such as a broken water pump impeller or the addition of an aftermarket auxiliary cooler.

Turn the ignition on.

With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes
1. Go to step 2).
No
1. Refer to *CHECKING FOR AN INTERMITTENT DTC .
2. Perform *PCM VERIFICATION TEST .
2) CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION
Perform the diagnostic procedure for *CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR OPERATION .

Were any problems found?

Yes
1. Repair as necessary in accordance with the Service Information.
2. Perform *PCM VERIFICATION TEST .
No
1. Perform *PCM VERIFICATION TEST .