On-Vehicle Inspection

1. Inspect the throttle control motor for operating sound.
   1. Turn the ignition switch ON.
   2. When depress the accelerator pedal, check the running sound of the motor. Also, check that there is no friction sound.

   If operation is not as specified, check the throttle control motor (See  3 ), wiring and ECM.

   Fig 1: Inspecting Throttle Control Motor For Operating Sound

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the accelerator pedal position sensor.
   1. Connect the TOYOTA hand-held tester to the DLC3.
   2. Check that the MIL does not light up.
   3. When turning the accelerator pedal position sensor lever to the full-open position, check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shows the standard value.

   Standard throttle valve opening percentage: 60 % or more 

   If operation is not as specified, check that the accelerator pedal position sensor (See DTC P2120: THROTTLE/PEDAL POSITION SENSOR/SWITCH ), wiring and ECM.

   Fig 2: Connecting Hand-Held Tester To DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If you have no TOYOTA hand-held tester, measure voltage between terminals VTA and E2 of the ECM connector (See DTC P0120: THROTTLE/PEDAL POSITION SENSOR/SWITCH ).

3. Inspect the idle speed.
   1. Start the engine and check that the MIL does no light up.
   2. Allow the engine to warm up to normal operating temperature.
      Fig 3: Identifying ECM Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Turn the A/C compressor ON to OFF, and check the idle speed.

   Idle speed (Transmission in neutral): 700 +/- 50 rpm 

   NOTE: Perform inspection under condition without electrical load.
4. After checking the above (a) to (c), perform the driving test and check that there is no sense of incongruity.

1. Disconnect the throttle control motor connector.
2. Using an ohmmeter, measure the motor resistance between terminal M+ and M-.

   Motor resistance: 0.3 - 100 Ω at 20°C (68°F) 

   If the resistance is not as specified, replace the throttle body assembly (See REMOVAL  ).

3. Reconnect the throttle control motor connector.

If necessary, replace the throttle body assembly (See REMOVAL  ).