Throttle Position Sensor

NOTE: Supra Turbo contains a main throttle position sensor and a sub-throttle position sensor on throttle body. See Fig 1 and Fig 2. Following procedure is for main throttle position sensor. For adjustment of sub-throttle position sensor, see SUB-THROTTLE POSITION SENSOR .

Disconnect electrical connector from Throttle Position (TP) sensor. Loosen TP sensor mounting screws. Connect ohmmeter between terminals IDL and E2. See Fig 1 and Fig 2.
Apply vacuum to throttle opener. 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

Turbo ⁽¹⁾⁽²⁾

.026 (.65)

.021 (.54)

Continuity

.028 (.70)

No Continuity

Non-Turbo ⁽¹⁾

.020 (.50)

.016 (.40)

Continuity

.024 (.60)

No Continuity

⁽¹⁾	Apply vacuum to throttle opener before checking TP sensor adjustment.

⁽²⁾	Turbo models contain a main throttle position sensor and a sub-throttle position sensor on throttle body. See Figure. Procedure is for main throttle position sensor. For adjustment of sub-throttle position sensor, see SUB-THROTTLE POSITION SENSOR.

Fig 1: Adjusting Throttle Position Sensor (Non-Turbo)

Fig 2: Adjusting Throttle Position Sensor (Turbo)