Disconnect electrical connector from Throttle Position (TP) sensor. Loosen TP sensor mounting screws. Connect ohmmeter between terminals IDL and E2. See Fig 1.
Apply vacuum to throttle opener (if equipped). To set initial clearance, insert proper thickness feeler gauge between throttle stop screw and throttle lever. See THROTTLE POSITION SENSOR ADJUSTMENT table.
With ohmmeter showing no continuity, rotate TP sensor clockwise until continuity exists. Tighten TP sensor mounting screws. Using specified feeler gauge, recheck for continuity and no continuity at adjusted clearances. Disconnect ohmmeter. Install electrical connector on TP sensor.

THROTTLE POSITION SENSOR ADJUSTMENT

Application Type

Initial Clearance

Adjusted Clearance

Ohmmeter Reading

Corolla ⁽¹⁾

.028 (.70)

.016 (.40)

Continuity

.035 (.90)

No Continuity

⁽¹⁾	On models with throttle opener, apply vacuum to throttle opener before checking TP sensor adjustment.

Fig 1: Adjusting Throttle Position Sensor

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.

Safety Warning

Throttle Position Sensor