Sub-Throttle Position (Sub-TP) Sensor: Adjustment

WARNING: This page is about a different car, the 1995 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect sub-TP sensor connector. Loosen sub-TP sensor mounting screws. Remove sub-throttle actuator. See Fig 1. Ensure sub-throttle valve is fully closed and sub-throttle valve gear is touching stop screw. Insert feeler gauge between gear and stop screw. See SUB-TP SENSOR ADJUSTMENT table.
Connect ohmmeter between terminals IDL2 and E2 of sub-TP sensor connector. See Fig 2. Rotate sub-TP sensor counterclockwise until there is no continuity, then rotate it clockwise until there is continuity. Tighten sub-TP sensor mounting screws. Inspect sub-TP sensor again.

SUB-TP SENSOR ADJUSTMENT

Application	Feeler Gauge Thickness
GS300	.016" (.41 mm)

Fig 1: Locating Sub-Throttle Valve Stop Screw

Fig 2: Identifying TP Sensor & Sub-TP Sensor Connector Terminals