On-Vehicle Inspection

Check that the throttle linkage moves smoothly.

Fig 1: Inspecting Throttle Body

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the sensor connector.
2. Disconnect the vacuum hose from the throttle body.
3. Apply vacuum to the throttle opener.
4. Using an ohmmeter, measure the resistance between each terminal.

   Resistance: 

   RESISTANCE CHECK
   
   

   Throttle valve condition	Between terminals	Resistance
   Fully closed	VTA - E2	0.2 - 6.3Ω
   Fully open	VTA - E2	2.0 - 10.2Ω
   -	VC - E2	2.5 - 5.9Ω

   Fig 2: Inspecting Throttle Position Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Reconnect the vacuum hose to the throttle body.

1. Allow the engine to warm up to normal operating temperature.
2. Check idle speed.

   Idle speed: 650 +/- 50 rpm 

3. Disconnect the vacuum hose from the throttle opener, and plug the hose end.
4. Check the throttle opener setting speed.

   Throttle opener setting speed: 1,100 -1,700 rpm 

   If the throttle opener setting is not as specified, replace the throttle body.

   Fig 3: Disconnecting Vacuum Hose

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Stop the engine.
6. Reconnect the vacuum hose to the throttle opener.
7. Start the engine and check that the idle speed returns to the correct speed.