Throttle Position Sensor: Adjustments

Adjustment conditions:
Engine coolant temperature, 176°F to 203°F.
Engine lubricant temperature, over 176°F.
Lights, electric cooling fan and all accessories, OFF.
Transmission, in neutral ("P" or "N" range for A/T vehicles).
Steering wheel, in the straight forward position (Vehicles with power steering).





1. Loosen the accelerator cable.

Diagnostic Connector Location:

2. Connect the hyundai multi-use tester to the diagnosis connector.

Throttle Position Sensor Test Hook-up:

Throttle Position Sensor Connector, Terminal Identification:

3. If the hyundai multi-use tester is not used install a tachometer, and connect a digital type voltmeter between terminals 1 and 2 of the throttle position sensor.
Do not disconnect the TPS connector from the throttle body.

Tachometer Hook-up:

NOTE: Insert a paper clip, from the harness side, into the connector between the primary side of the ignition coil and the noise filter. Connect the tachometer to the paper clip.

4. Turn the ignition switch to ON (do not start the engine) and leave in that position for 15 seconds or longer; then check to be sure that the idle speed control servo is set to the initial position (curb idle)
NOTE: When the ignition switch is turned to ON, the ISC plunger extends to the fast idle position; then, after 15 seconds, it retracts stopping at the initial position.
Standard value
Motor position sensor..........0.9V

5. Turn the ignition switch OFF.

ISC Motor Connector Location:

6. Disconnect the ISC motor connector to secure the ISC motor in the initial position.

Fixed SAS Location:

7. Loosen the fixed SAS, then in order to prevent the throttle valve from sticking, open it (half way or more) two or three times, releasing it to click shut.
8. Start the engine and run at idle speed.
9. Check that the engine rpm is within the standard value. If the multi-use tester is used, press code No.22 and read engine rpm.
Standard value
Curb idle rpm.........700 ± 100 rpm

10. If the engine speed is not as specified, adjust by the ISC adjusting screw for the standard rpm.
11. Tighten the fixed SAS until the engine speed starts to increase. Then, loosen it until the engine speed ceases to drop (touch point). Loosen an additional half turn from the touch point.
12. Stop the engine.
13. Turn the ignition switch to ON (engine does not start) and check that the TPS output voltage is as specified.
Standard value
TPS output.......0.48-0.52V

Throttle Position Sensor Adjustment:

14. If the output is not within specification, loosen TPS mounting screws and adjust by turning the TPS.
NOTE: Turning the TPS clockwise increases the output voltage.
CAUTION: Tighten the screws securely after adjustment.

15. Turn OFF the ignition switch.
16. Adjust the accelerator cable play.
Standard value
M/T.................0-1 mm (0-0.04 in.)
A/T..............2-3 mm (0.08-0.12 in.)

17. Connect the ISC motor connector.
18. Disconnect the voltmeter, and connect the TPS connector.
19. Start the engine and check to be sure that the idle speed is correct.
20. Turn OFF the ignition switch and disconnect the battery terminal for 15 seconds and then reconnect. (This erases the data stored in ECU memory during the ISC adjustment).