Inspection Procedure

HINT:

• If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
• Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

Hand held tester: 

1. READ VALUE USING HAND HELD TESTER (THROTTLE VALVE OPENING PERCENTAGE) 
   1. Connect a hand-held tester to the DLC3.
   2. Turn the ignition switch to ON and turn the tester ON.
   3. Select the following menu items: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ETCS/THROTTLE POS.
   4. Read the value displayed on the tester when the accelerator pedal is released and depressed.
   Fig 1: Releasing And Depressing Accelerator Pedal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result: 

   RESULT REFERENCE
   
   

   Throttle Valve Opening Angle (%)	Proceed To
   0 (constant)	A
   From approximately 0 to 75	B
   Approximately 100 (constant)	C

   B:  CHECK FOR INTERMITTENT PROBLEMS  ) 

   C: Go to step   4 

   A: Go to next step. 

2. INSPECT THROTTLE POSITION SENSOR 
   1. Disconnect the T1 Throttle Position (TP) sensor connector.
   2. Measure the resistance between the terminals of the TP sensor.

      Standard: 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (1 OF 2)
      
      

      Tester Connections	Throttle Valve Positions	Specified Conditions
      VC (T1-1) - E2 (T1-2)	-	Between 2.5 kΩ and 6.0 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully closed	Between 0.2 kΩ and 5.7 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully open	Between 2.0 kΩ and 10.2 kΩ

      Fig 2: Inspecting Throttle Position Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the TP sensor connector.

   NG: REPLACE THROTTLE POSITION SENSOR 

   OK: Go to next step. 

3. CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR) 
   1. Disconnect the E3 ECM connector.
   2. Measure the resistance between the terminals of the ECM connector.

      Standard: 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (2 OF 2)
      
      

      Tester Connections	Throttle Valve Positions	Specified Conditions
      VC (E3-18) - E2 (E3-28)	-	Between 2.5 kΩ and 6.0 kΩ
      VTA (E3-21) - E2 (E3-28)	Fully closed	Between 0.2 kΩ and 5.7 kΩ
      VTA (E3-21) - E2 (E3-28)	Fully open	Between 2.0 kΩ and 10.2 kΩ

      Fig 3: Disconnecting E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check the resistance.

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      VC (E3-18) - Body ground	10 kΩ or higher
      VTA (E3-28) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE)  ) 

4. INSPECT THROTTLE POSITION SENSOR 
   1. Disconnect the T1 TP sensor connector.
   2. Measure the resistance between the terminals of the TP sensor.

      Standard: 

      TESTER CONNECTIONS SPECIFIED CONDITIONS
      
      

      Tester Connections	Throttle Valve Positions	Specified Conditions
      VC (T1-1) - E2 (T1-2)	-	Between 2.5 kΩ and 6.0 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully closed	Between 0.2 kΩ and 5.7 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully open	Between 2.0 kΩ and 10.2 kΩ

      Fig 4: Inspecting Throttle Position Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the TP sensor connector.

   NG: REPLACE THROTTLE POSITION SENSOR 

   OK: Go to next step. 

5. CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR) 
   1. Disconnect the E3 ECM connector.
   2. Disconnect the T1 TP sensor connector.
   3. Check the resistance.
      Fig 5: Disconnecting E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (FOR OPEN)
      
      

      Tester Connections	Specified Conditions
      VC (T1-1) - VC (E3-18)	Below 1 Ω
      VTA (T1-3) - VTA (E3-21)	Below 1 Ω
      E2 (T1-2) - E2 (E3-28)	Below 1 Ω

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      VC (T1-1) or VC (E3-18) - Body ground	10 kΩ or higher
      VTA (T1-3) or VTA (E3-21) - Body ground	10 kΩ or higher

   4. Reconnect the TP sensor connector.
   5. Reconnect the ECM connector.

Fig 6: Identifying TP Sensor Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE)  ) 

OBD II scan tool (excluding the hand-held tester): 

1. INSPECT THROTTLE POSITION SENSOR 
   1. Disconnect the T1 Throttle Position (TP) sensor connector.
   2. Measure the resistance between the terminals of the TP sensor.

      Standard: 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (1 OF 2)
      
      

      Tester Connections	Throttle Valve Positions	Specified Conditions
      VC (T1-1) - E2 (T1-2)	-	Between 2.5 kΩ and 6.0 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully closed	Between 0.2 kΩ and 5.7 kΩ
      VTA (T1-3) - E2 (T1-2)	Fully open	Between 2.0 kΩ and 10.2 kΩ

      Fig 7: Disconnecting T1 Throttle Position (TP) Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the TP sensor connector.

   NG: REPLACE THROTTLE POSITION SENSOR 

   OK: Go to next step. 

2. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM) 
   1. Disconnect the E3 ECM connector.
   2. Measure the resistance between the terminals of the ECM connector.
      Fig 8: Disconnecting E3 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (2 OF 2)
      
      

      Tester Connections	Throttle Valve Positions	Specified Conditions
      VC (E3-18) - E2 (E3-28)	-	Between 2.5 kΩ and 6.0 kΩ
      VTA (E3-21) - E2 (E3-28)	Fully closed	Between 0.2 kΩ and 5.7 kΩ
      VTA (E3-21) - E2 (E3-28)	Fully open	Between 2.0 kΩ and 10.2 kΩ

   3. Check the resistance.

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITIONS (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      VC (E3-18) - Body ground	10 kΩ or higher
      VTA (E3-28) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE)  )