Diagnostic Procedure

DIAGNOSTIC PROCEDURE

HINT: If diagnostic trouble codes "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.

1. Check voltage of sensor.
- If OK check for momentary interruption (loose connection).
- 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 engine control module.
- If not OK repair or replace harness or connector.