On-Vehicle Inspection

REMOVE V-BANK COVER
INSPECT SYSTEM OPERATION
1. Inspect the throttle control motor for operating sound.
  1. Turn the ignition switch ON.
  2. When turning the accelerator pedal position sensor lever, 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 step 3), wiring and ECM.
  
  Fig 1: Identifying Throttle Control Motor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the accelerator pedal position sensor.
  1. Connect the LEXUS hand-held tester or OBD II scan tool to the DLC3.
  2. Check that the MIL does not come on.
  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, P2122, P2123, P2125, DTC P2127, P2128, P2138 ), wiring and ECM.
  
  If you have no LEXUS hand-held tester or OBD II scan tool, measure the voltage between terminal VPA and E2 of the ECM connector.
3. Inspect the air assist system.
  1. Start the engine and check that the MIL does not come on.
  2. Allow the engine to warm up to normal operating temperature.
  3. Turn the A/C compressor ON to OFF, and check the idle speed.
  Fig 3: Measuring Voltage Between Terminal VPA And E2 Of ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Idle speed (Transmission in neutral): 700 +/- 50 rpm
  
  NOTE: Perform inspection under the condition with no electrical load.
4. After checking the above (b) to (d), perform the running test and check that there is no incongruity.
INSPECT THROTTLE CONTROL MOTOR
1. Disconnect the throttle 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.
3. Reconnect the throttle body connector.
Fig 4: Measuring Motor Resistance Between Terminal (M+) And (M-)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT THROTTLE POSITION SENSOR (See DTC P0120, P0122, P0123, P0220, P0222, P0223, P2135 )
If necessary, replace the throttle body.

NOTE: Be careful not to give a shock to the throttle body.

Be careful not to disassemble the throttle body.
REINSTALL V-BANK COVER