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Home >> Mitsubishi >> 1999 >> Montero Sport ES 2WD L4-2.4L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Adjustments
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Throttle Position Sensor: Adjustments

CLOSED THROTTLE POSITION SWITCH AND THROTTLE POSITION SENSOR ADJUSTMENT

Required Speed Tools:
MB991502: Scan Tool
MB991348: Test Harness Set

1. Connect the scan tool to the data link connector. When not using scan tool MB991502 proceed as follows.




1. Disconnect the connector of the throttle position sensor.




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




2. Insert a feeler gauge with a thickness of 0.45 mm (0.177 inch) between the fixed SAS and the throttle lever.
3. When using scan tool MB991502 turn the ignition switch "ON." (Do not start engine.) Observe operation of the closed throttle position switch.




4. Loosen the throttle position sensor mounting bolt. Then turn the throttle position sensor body fully counterclockwise.
5. In this condition, make sure that the closed throttle position switch is "ON."
6. Slowly turn the throttle position sensor clockwise until the closed throttle position switch turns "OFF." Tighten the throttle position sensor installation bolt at that position. When using the scan tool, proceed to Step 8.




7. When not using scan tool MB991502 proceed as follows:

1. Connect special tool MB991348 between the throttle position sensor connectors which have been disconnected. (Connect all terminals taking care not to mistake the terminal number.)
2. Connect a digital voltmeter between the throttle position sensor terminal 2 (sensor output) and terminal 4 (sensor ground.)
3. Turn the ignition switch "ON" (but do not start the engine).

8. Check the throttle position sensor output voltage.

Standard value: 400 - 1,000 mV

9. If there is a deviation from the standard value, check the throttle position sensor and the related harness.
10. Remove the feeler gauge.
Confirm the closed throttle position switch changed from "OFF" to "ON."
11. Turn the ignition switch "OFF."




FIXED SAS ADJUSTMENT

NOTE:
- The fixed Speed Adjusting Screw (SAS) should not be moved unnecessarily; it has been precisely set by the manufacturer
- If the adjustment is disturbed for any reason, readjust as follows.

1. Loosen the tension of the accelerator cable sufficiently.
2. Back out the fixed SAS lock nut.
3. Turn the fixed SAS counterclockwise until it is sufficiently backed out, fully closing the throttle valve.
4. Turn the fixed SAS clockwise until the throttle lever is touched (i.e., the point at which the throttle valve begins to open).
From that point, turn the fixed SAS clockwise another 1 - 1/4 turn.

NOTE: Monitor the TPS value with the scan tool .

5. Hold the fixed SAS so that it doesn't move. Tighten the lock nut securely.
6. Adjust the tension of the accelerator cable.
7. Adjust the basic idle speed.
8. Adjust the closed throttle position switch and the throttle position sensor.
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