Throttle Position Sensor: Adjustments

Throttle Position Sensor Location:

1. Disconnect the throttle position sensor connector.

Idle Position Switch, Continuity Check:

2. Using jumper wires, connect an ohmmeter across terminal 3 (closed throttle position switch) and terminal 4 (sensor ground) of the throttle position sensor.

Idle Switch Continuity Check, Set-up:

3. Insert a 0.65-mm (.025 in.) thick feeler gauge between the fixed Speed Adjusting Screw (SAS) and throttle lever.

Idle Switch Check For Continuity:

4. Loosen the throttle position sensor mounting bolts and turn the throttle position sensor body fully counterclockwise.
5. In this condition, check that there is continuity across terminals 3 and 4

Idle Switch Check For No Continuity:

6. Slowly turn the throttle position sensor clockwise until you find a point at which there is no continuity across terminals 3 and 4. Then, tighten the throttle position sensor mounting bolt securely.
7. Connect the throttle position sensor connector.
8. Connect the scan tool to the data link connector.





9. If not using the scan tool, proceed as follows:

^ Disconnect the throttle position sensor connectors and connect the special tool, Test Harness Set, between the disconnected connectors.
^ Connect a digital voltmeter between the throttle position sensor terminal 2 (sensor output) and terminal 4 (sensor ground).

10. Turn the ignition switch "ON" (but do not start the engine).
11. Check the throttle position sensor output voltage.

Standard value: 400 - 1,000 mV

12. If the voltage is out of specification, check the throttle position sensor and associated harnesses.
13. Remove the feeler gauge.
14. Turn the ignition switch "OFF".