Throttle Position Switch: Testing and Inspection

THROTTLE POSITION SWITCH CIRCUIT CHECKS




DESCRIPTION
Consists of a wide-open throttle position switch and a closed throttle position switch.
The wide-open position switch sends a signal to the A/T control unit when the throttle valve is open at least 1/2 of the full throttle position. The closed throttle position switch sends a signal to the A/T control unit when the throttle valve is fully closed.

OVERALL FUNCTION CHECK
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT
1. Start engine.




2. Select "SELF-DIAG RESULTS" mode for ECM with CONSULT.
3. Drive vehicle under the following conditions:
Selector lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 km/h (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 5 seconds.

OR

WITH GST
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 km/h (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 5 seconds.




3. Select "MODE 3" with GST.

OR

WITH NO TOOLS
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 km/h (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 5 seconds.
3. Perform self-diagnosis for ECM.










DIAGNOSTIC PROCEDURE