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.

1992 Geo Tracker LSi, AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor (TPS)

NOTE: To identify TPS terminals, see Fig 1 .

THROTTLE POSITION SENSOR (TPS) RESISTANCE

Condition

Resistance (Ohms)

Between Terminals 1 & 4 ⁽¹⁾

12-18

⁽¹⁾	With .016" (.4 mm) feeler gauge installed between throttle stop screw and lever. DVOM connected to TPS terminals No. 1 (Green wire) and No. 4 (Black wire). With throttle valve at idle position, apply about 16-20 in. Hg to throttle opener valve.

Fig 1: Throttle Position Sensor Terminal ID

Courtesy of GENERAL MOTORS CORP.

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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.

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