Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 OF HAND-HELD TESTER (ACCEL POS #1, ACCEL POS #2) 
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON.
   3. On the hand-held tester, enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/ACCEL POS #1 and ACCEL POS #2. Read the values.

      Standard: 

      DATA LIST (ACCELERATOR PEDAL)
      
      

      Accelerator Pedal	ACCEL POS #1	ACCEL POS #2
      Released	0.5 to 1.1 V	1.2 to 2.0 V
      Depressed	2.6 to 4.5 V	3.4 to 5.3 V

      Fig 1: Identifying Accelerator Pedal Releasing And Depressing Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
   2. NG: Go to next step 
2. INSPECT ACCELERATOR PEDAL (ACCELERATOR PEDAL POSITION SENSOR) 
   1. Disconnect the A18 sensor connector.
   2. Check the resistance of the sensor terminals.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      3 of EP1 - 6 of VCP1 1 of EP2 - 4 of VCP2	2.25 to 4.75 kΩ at 20°C (68°F)

      Fig 2: Checking Resistance Of Sensor Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE ACCELERATOR PEDAL 
   2. OK: Go to next step 
3. INSPECT ECM (VPA, VPA2 VOLTAGE) 
   1. Turn the ignition switch ON.
   2. Check the voltage of the ECM connector.
      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Accelerator Pedal Condition	Specified Condition
      E6-22 (VPA) - E6-28 (EPA)	Released	0.5 to 1.1 V
      E6-22 (VPA) - E6-28 (EPA)	Depressed	2.6 to 4.5 V
      E6-23 (VPA2) - E6-29 (EPA2)	Released	1.2 to 2.0 V
      E6-23 (VPA2) - E6-29 (EPA2)	Depressed	3.4 to 5.3 V

      Fig 3: Checking Voltage Of ECM Connector (VPA, VPA2)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ). 
   2. NG: Go to next step 
4. CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM) 
   1. Disconnect the A18 sensor connector.
   2. Disconnect the E6 ECM connector.
   3. Check the resistance of the wire harness side connectors.

      Standard: 

      Fig 4: Checking Wire Harness - Accelerator Pedal Position Sensor - ECM (1 Of 2)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002