Inspection Procedure

INSPECTION PROCEDURE

1. Check output condition of Diagnostic Trouble Code 51.
- Setting the test mode. Turn ignition switch OFF.
- Connect terminals TE2 and E1 of DLC1 or 2.
- Turn Ignition Switch ON. (For checking terminal A/C, start the engine.)
- Connect terminals TE1 and E1 of DLC1 or 2.
- Check if code "51" is output by the Malfunction Indicator Lamp.

NOTE: Diagnostic Trouble Code 42 is output with vehicle speed 3 mph or below.





- 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 Throttle Position Sensor.





- Disconnect Throttle Position Sensor connector.
- Measure resistance between terminals 2 and 1 of Throttle Position Sensor connector.

With Throttle Valve fully closed; Less than 0.5 k ohms
With Throttle Valve opened; 1 Mega ohms or higher

- If OK check and repair harness or connector between Engine Control Module and Throttle Position Sensor.
- If not OK adjust or replace Throttle Position Sensor.
3. Check voltage between terminal A/C of Engine Control Module connector and body ground.





- Connect the Check Harness A.
- Start the engine.
- Measure voltage between terminal A/C of Engine Control Module and body grnund.

With A/C Switch ON; 7.5 to 14 volts
With A/C Switch OFF; 1.5 volts

- If OK check and replace Engine Control Module.
- If not OK check A/C compressor circuit.