Disconnect electrical connector from Throttle Position Sensor (TPS). Loosen TPS mounting screws. Connect ohmmeter between terminals IDL and E2. See Fig 1 and Fig 2.
Apply vacuum to throttle opener (if equipped). To set initial clearance, insert proper thickness feeler gauge between throttle stop screw and throttle lever. Refer to the appropriate THROTTLE POSITION SENSOR ADJUSTMENT table.
With ohmmeter showing no continuity, rotate TPS clockwise until continuity exists. Tighten TPS mounting screws. Using specified feeler gauge, recheck adjusted clearance. Disconnect ohmmeter. Install electrical connector on TPS.

THROTTLE POSITION SENSOR ADJUSTMENT

Application/ Model

Initial Clearance In. (mm)

Adjusted Clearance In. (mm)

Ohmmeter Reading

Paseo ⁽¹⁾

.024 (.61)

.020 (.51)

Continuity

.028 (.71)

No Continuity

Tercel ⁽²⁾

.024 (.61)

.020 (.51)

Continuity

.028 (.71)

No Continuity

⁽¹⁾	On A/T and California models, apply vacuum to throttle opener before checking TPS adjustment.

⁽²⁾	On California models, apply vacuum to throttle opener before checking TPS adjustment.

Fig 1: Adjusting Throttle Position Sensor (Paseo)

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