Diagnostic Procedure

DTC 22 Engine Coolant Temp. Sensor Circuit




1. CHECK VOLTAGE OF SENSOR.
- If OK check for momentary interruption.
- If not OK proceed to step 2.

2. CHECK RESISTANCE OF SENSOR.
- If OK proceed to step 3.
- If not OK replace engine coolant temperature sensor.

3. CHECK FOR OPEN AND SHORT IN HARNESS AND CONNECTOR BETWEEN ENGINE CONTROL MODULE AND ENGINE COOLANT TEMPERATURE SENSOR.
- If OK check and replace ECM.
- If not OK repair or replace harness or connector.

NOTE: If DTC 22 (engine coolant temperature sensor circuit), 24 (intake air temperature sensor circuit) and 41 (throttle position sensor circuit) are output simultaneously, E2 (sensor ground) may be open.