Mirage L4-1597cc 1.6L DOHC Turbo (1989)
Throttle Position Sensor: Adjustments
CAUTION: Before attempting to adjust the Throttle Sensor, make certain the idle speed and ignition timing are correctly adjusted. See this section for
the proper procedures.
Adjustment requirements:
a.
Engine fully warmed up. (185-205F deg)
b.
All lights, engine cooling fan and accessories "off".
c.
Transmission in P or N.
d.
Steering wheel in the straight ahead position (models with power steering only)
1.
Verify that the throttle cable has enough slack that it is not holding the throttle open in any way. Loosen the adjustment bolts for the throttle cable
if necessary.
2.
Using a high-impedance digital voltmeter, carefully back probe the throttle position connector into terminals #2 and #4. Refer to the connector in
the image.
System Schematic
3.
With the key on, engine off, check that the output voltage of the TPS is within 0.48 - 0.52 volts. If not, adjust the TPS by loosening the mounting
screws and rotating the sensor.
NOTE: Clockwise rotation of the sensor increases the voltage output while counter-clockwise rotation reduces voltage.
4.
Tighten the sensor set screws securely.
5.
Turn the ignition switch OFF.
6.
Disconnect the battery for at least ten seconds to clear any stored trouble codes.
7.
If the throttle cable was previously loosened, return the cable to the proper adjustment.
