On-Vehicle Inspection

INSPECT SYSTEM OPERATION
1. Check that the throttle linkage moves smoothly.
  
  Fig 1: Checking Throttle Linkage Moves Smoothly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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 2), wiring and ECM.
  
  Fig 2: Inspecting Throttle Control Motor For Operating Sound
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the accelerator pedal position sensor.
  1. Connect the 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 shown 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 step 4), wiring and ECM.
  
  Fig 3: Connecting Hand-Held Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If you have no hand-held tester, measure the voltage between terminals VTA and E2 of the ECM connector.
4. Inspect the idle speed.
  1. Start the engine and check that the MIL does not light up.
  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.
  Idle speed (Transmission in neutral): 700 +/- 50 RPM
  
  Fig 4: Measuring Voltage Between Terminals VTA And E2 Of ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Perform inspection under condition without electrical load.
5. After checking the above (b) to (d), perform the drive test and check that there is no sense of incongruity.
INSPECT THROTTLE CONTROL MOTOR
1. Disconnect the throttle control motor connector.
2. Using an ohmmeter, measure the motor resistance between terminals 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 REPLACEMENT ).
3. Using an ohmmeter, measure the clutch resistance between terminals CL+ and CL-.
  Clutch resistance: 4.2 - 5.2 Ω at 20°C (88°F)
  
  If the resistance is not as specified, replace the throttle body assembly (See REPLACEMENT ).
4. Reconnect the throttle control motor connector.
Fig 5: Measuring Clutch Resistance Between Terminals CL+ And CL-
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT THROTTLE POSITION SENSOR
1. Disconnect the throttle position sensor connector.
2. Using an ohmmeter, measure the resistance between terminals VC and E2.
  Resistance: 1.2 - 3.2 kΩ at 20°C (68°F)
  
  If the resistance is not as specified, replace the throttle body assembly (See REPLACEMENT ).
3. Reconnect the throttle position sensor connector.
Fig 6: Measuring Resistance Between Terminals VC And E2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ACCELERATOR PEDAL POSITION SENSOR
1. Disconnect the pedal position sensor connector.
2. Using an ohmmeter, measure the resistance between terminals VC and E2.
  Resistance: 1.2 - 3.2 kΩ at 20°C (68°F)
  
  If the resistance is not as specified, replace the throttle body assembly (See REPLACEMENT ).
3. Reconnect the pedal position sensor connector.
Fig 7: Measuring Resistance Between Terminals VC And E2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002