Throttle Position Sensor: Adjustments

To adjust the Throttle Position Sensor, proceed as follows:

Adjustment Screw Locations:

1. Loosen the accelerator cable.
2. Loosen the speed adjusting screws SAS 1 and SAS 2 to close the throttle valve completely. Record the number of turns of each screw from the initial setting.
NOTE: Turning the screw counter clockwise closes the valve. At this time the fast idle control should have been released (the lever not resting on the fast idle cam).

TPS Connector, Terminal Identification:

3. Connect voltmeter (digital type) between terminals 2 and 8 of TPS connector pins.
NOTE: Do not disconnect the TPS connector from the chassis harness.

4. Turn the ignition switch to ON. DO NOT start the engine.
5. Measure the TPS output voltage.
Standard value.......250 mV

Throttle Position Sensor Location:

6. If the output voltage is not correct, Loosen the TPS mounting screws and turn the TPS body and adjust to specification.
NOTE: Turning the TPS body clockwise increases the output voltage.

7. Turn the ignition switch to OFF.
8. Tighten SAS 1 and SAS 2 by the same number of turns as loosened in step (2) to return them to initial position.
9. Adjust free play of the accelerator cable. Turn the accelerator adjusting nut to the point where the throttle lever just starts moving, then back off one turn and secure the lock nut.
10. Start the engine and check that the idle speed as specified.