hand held tester:

READ VALUE OF hand held TESTER (THROTTLE VALVE OPENING PERCENTAGE)
1. Connect the hand held tester to the DLC3.
2. Turn the ignition switch ON.
3. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST/ETCS/THROTTLE POS" and read its value displayed on the hand held tester.
  Result:
  
  Fig 1: Throttle Valve Position & Pedal Operation Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Accelerator Pedal Depressing and Release
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. B: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )
2. C: Go to step 4
3. A: Go to next step.
INSPECT THROTTLE POSITION SENSOR
1. Disconnect the T1 throttle position sensor connector.
2. Measure the resistance between the terminals of the throttle position sensor.
  Standard:
  
  Fig 3: Tester Connection & Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the throttle position sensor connector.
  
  Fig 4: Identifying Throttle Position Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE THROTTLE POSITION SENSOR
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR)
1. Disconnect the E3 ECM connector.
2. Measure the resistance between the terminals of the E3 ECM connector.
  Standard:
  
  Fig 5: Tester Connection & Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Identifying ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the resistance between the terminals of the E3 ECM connector.
  Standard (Check for short):
  
  Fig 7: Tester Connection & Specific Conditions Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the ECM connector.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See REPLACEMENT )
INSPECT THROTTLE POSITION SENSOR
1. Disconnect the T1 throttle position sensor connector.
2. Measure the resistance between the terminals of the throttle position sensor.
  Standard:
  
  Fig 8: Tester Connection & Specific Conditions Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the throttle position sensor connector.
  
  Fig 9: Identifying Throttle Position Sensor T1
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE THROTTLE POSITION SENSOR
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR)
1. Disconnect the E3 ECM connector.
2. Disconnect the T1 throttle position sensor connector.
3. Check the resistance between the wire harness side connectors.
  Standard (Check for open):
  
  Fig 10: Tester Connection & Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Identifying ECM Connector E3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 12: Tester Connection & Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the throttle position sensor connector.
5. Reconnect the ECM connector.
  
  Fig 13: Identifying Throttle Position Sensor Connector T1
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See REPLACEMENT )