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: Description Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Depressing & Releasing Throttle Pedal
  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: T1 Throttle Position Sensor Connector terminals Specified Condition table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the throttle position sensor connector.
  
  Fig 4: Identifying Throttle Position Sensor Connector Terminals
  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 Connections Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Identifying E3 ECM Connector Terminals
  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 Connections Specified Condition Table (Check For Short)
  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: Identifying Throttle Position Sensor Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the throttle position sensor connector.
  
  Fig 9: Tester Connections Specified Condition Table
  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 Connections Specified Condition Table (Check For Open)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Identifying E3 ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 12: Identifying T1 throttle Position Sensor Connector Terminals (Wire Harness Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the throttle position sensor connector.
5. Reconnect the ECM connector.
  
  Fig 13: Tester Connections Specified Condition Table (Check For Short)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See REPLACEMENT )