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: 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 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 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 "D" CIRCUIT, DTC P2122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D" CIRCUIT LOW INPUT, DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D" CIRCUIT HIGH INPUT, DTC P2125 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT, DTC P2127 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT LOW INPUT, DTC P2128 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT HIGH INPUT, DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D'V'E" VOLTAGE CORRELATION ), wiring and ECM.
    
    Fig 2: Connecting Toyota Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If you have no TOYOTA 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: Inspecting Air Assist System
    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: THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT, DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW INPUT, DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT HIGH INPUT, DTC P0220 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT, DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT LOW INPUT, DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT HIGH INPUT, DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A"/"B" VOLTAGE CORRECTION )
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