Inhibitor, Overdrive and Throttle Position Switch Circuit Checks

Parts description
- Inhibitor switch
Detects the selector lever position and sends a signal to the A/T control unit.
- Overdrive switch
Detects the overdrive control switch position (ON or OFF) and sends a signal to the A/T control unit.
- Throttle position switch
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.

Part 1:

Part 2:

Part 3:

Part 4:

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:
Shift lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 KPH (6 MPH), throttle opening greater than 1/2 of the full throttle position and driving for more than 5 seconds.

OR




With Generic Scan Tools
1. Start engine.
2. Drive vehicle under the following conditions:
Shift lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 KPH (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

Without Scan Tools
1. Start engine.
2. Drive vehicle under the following conditions:
Shift lever in D, OD control switch in "OFF" position, vehicle speed higher than 10 KPH (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.
Description of On-Board Diagnostics