Note. Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information available is for checking TP sensor using the Diagnostic Trouble Code (DTC), P0120, P0122, P0123, P0220, P0222, P0223 &/OR P2135.
For inspection of TP sensor, see DTC P0120, P0122, P0123, P0220, P0222, P0223 &/OR P2135: THROTTLE POSITION SENSOR/SWITCH "A"/"B" CIRCUIT PROBLEM under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - 4RUNNER V6 article.
Scheme 101
Scheme 102
Scheme 103
- Start engine and warm engine to normal operating temperature. Ensure idle speed is within specification. See «IDLE SPEED & MIXTURE»(ref-151949-S04785361952003010900000).
- Shut engine off. Remove cap, filter and separator from dashpot on throttle body. (Scheme 101) Start engine. Maintain engine speed at 2500 RPM. Plug Vacuum Transmitting Valve (VTV) hole in dashpot with your finger. (Scheme 102)
- Release throttle. Dashpot should be extended and dashpot setting RPM should be 1800-2200 RPM. If dashpot setting RPM is not within specification, rotate dashpot adjusting screw to obtain correct RPM. (Scheme 103)
- Remove finger from VTV hole in dashpot. Ensure engine returns to proper idle speed in approximately one second. Install separator, filter and cap. Ensure filter is installed with the coarse surface facing outward (away from dashpot).