Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU1990XT-6 4WD L6-2.7L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHDESCRIPTION AND OPERATION
1990 Subaru XT-6 4WD L6-2.7L SOHC
Throttle Full Close Switch: Description and Operation
1990 Subaru XT-6 4WD L6-2.7L SOHCSECTION Description and Operation
Throttle Position Sensor:
PURPOSE
The throttle sensor informs the ECU of throttle angle and speed of application as well as idle position. This information is used to correct for acceleration and provide a reference point for the ECU.
LOCATION
The sensor is mounted to the throttle body on the intake manifold.
CONSTRUCTION
The throttle position sensor contains both a potentiometer (variable resistor) and an idle switch.
OPERATION
Whenever the ignition is ON, the throttle sensor returns a signal to the ECU. The unit functions as a throttle operated potentiometer. The ECU sends a known voltage signal to the unit. Sensor resistance is based on throttle angle. Depending on resistance, an output signal is sent to the ECU.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.