Diagnostic Procedure

DIAGNOSTIC PROCEDURE





1. Check for input signal.
- If OK proceed to DIAGNOSIS BY SYMPTOM.
- If not OK; Park / Neutral Position switch failure, see NON TROUBLE CODE CHART for PARK / NEUTRAL POSITION SWITCH.
- If not OK; A/C switch failure, proceed to step 3.
- If not OK; Idle switch failure, proceed to step 2.
2. Check resistance of Throttle Position Sensor.
- If OK check and repair harness or connector between sensor and ECM.
- If not OK adjust or replace Throttle Position Sensor
3. Check voltage of terminal A/C of ECM.
- If OK check and replace ECM.
- If not OK check A/C compressor circuit.