Sienna V6-3.0L (1MZ-FE) (2003)
Throttle Position Sensor: Testing and Inspection
ON-VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
Check that the throttle linkage moves smoothly.
2. INSPECT THROTTLE POSITION SENSOR
a. Apply vacuum to the throttle opener.
b. Disconnect the sensor connector.
c. Using an ohmmeter, measure the resistance between each terminal.
d. Reconnect the sensor connector.
3. INSPECT THROTTLE OPENER
a. Allow the engine to warm up to normal operating temperature.
b. Check the idle speed.
Idle speed: 700 ± 50 rpm
c. Disconnect the vacuum hose from the throttle opener, and plug the hose end.
d. Check the throttle opener setting speed.