Throttle Position Sensor: Adjustments

NOTE: When using scan tool, proceed to service data item 26 and observe the ON/OFF changes to the closed throttle position switch, instead of performing ohmmeter tests. If scan tool not available, follow the steps below.

TPS Connector:

1. Disconnect the connector of the throttle position sensor.

Adjusting TPS:

2. Connect an ohmmeter between terminal 3 (closed throttle position switch) and 4 (sensor ground) by using jumper wires.

Adjusting TPS:

3. Insert a feeler gauge with a thickness of 0.65 mm (.0256 in.) between the fixed SAS and the throttle lever.

Adjusting TPS:

4. Loosen the throttle position sensor mounting bolt; then turn the throttle position sensor body fully counterclockwise.
5. In this condition, check for continuity between terminals 3 and 4.

Adjusting TPS:

6. Slowly turn the throttle position sensor clockwise until the point at which continuity between terminals 3 and 4 changes to non-continuity is found. Tighten the throttle position sensor installation bolt at that position.

7. Connect the connector of the throttle position sensor.

Adjusting TPS:

8. Connect the scan tool to the data link connector (white). If not using the scan tool, proceed as follows:
a. Disconnect the throttle position sensor connectors and connect the special tool, Test Harness Set, between the disconnected connectors.
b. Connect a digital voltmeter between the throttle position sensor terminal 2 (sensor output) and terminal 4 (sensor ground).
9. Turn the ignition switch ON (but do not start the engine).
10. Check the throttle position sensor output voltage.

Standard value: 400 - 1,000 millivolts

11. If there is a deviation from the standard value, check the throttle position sensor and the related harness.
12. Remove the feeler gauge.
13. Switch OFF the ignition switch.