Throttle Position Sensor: Adjustments

Connecting Test Harness To Throttle Angle Sensor:

1. Connect the inspection adaptor between the throttle angle sensor and the engine wire harness.
2. Start the engine and warm up to normal operating temperature (cooling fan comes on).
3. Stop the engine and turn the ignition switch ON.
4. Measure the voltage between the red clip (+) and the green clip (-) of the adaptor.

Connect Vacuum Pump/Gauge To The Dashpot Diaphragm:

5. Connect the vacuum pump/gauge to the dashpot diaphragm, and apply vacuum.
6. When the throttle valve opening is at idle angle, measure the voltage between the white clip (+) and the green clip (-) of the adaptor.

Should Be: 0.48-0.52 volts ±10% (when the voltage between the red clip and green clip of the adaptor is 5.0 volts ±10%.)

a. Remove and reinstall the throttle angle sensor, adjusting its position, if the voltage is out of specification.

7. When the throttle valve is fully opened, measure the voltage between the white clip (+) and the green clip (-) of the adaptor.

Should Be: 3.80-4.66 volts (when the voltage between the red clip and green clip of the adaptor is 5.0 volts.)

a. Remove and reinstall the throttle angle sensor, adjusting its position, if the voltage is out of specification, and repeat the test from step 6.