Inspection Procedure

HINT:

Read freeze frame data using an intelligent tester. 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.

1. READ VALUE OF INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2) 
   1. Connect an intelligent tester to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD 11 / DATA LIST / ALL / ACCEL POS #1 and ACCEL POS #2.
   4. Read the values displayed on the tester.

      Standard Voltage 

      STANDARD VOLTAGE
      
      

      Accelerator Pedal Operations	ACCEL POS #1 (AP#1)	ACCEL POS #2 (AP#2)
      Released	0.5 to 1.1 V	1.2 to 2.0 V
      Depressed	2.6 to 4.5 V	3.4 to 5.0 V

      Fig 1: Identifying Accelerator Pedal Depressed And Released Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK:  Go to step  3

   NG: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR ECM) 
   1. Disconnect the A19 Accelerator Pedal Position (APP) sensor connector.
   2. Disconnect the E8 ECM connector.
   3. Check the resistance.

      Standard Resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      VPA (A19-6) - VPA (E8-18)	Below 1 Ω
      EPA (A19-5) - EPA (E8-20)
      VCPA (A19-4) - VCPA (E8-26)
      VPA2 (A19-3) - VPA2 (E8-19)
      EPA2 (A19-2) - EPA2 (E8-21)
      VCP2 (A19-1) - VCP2 (E8-27)

      Fig 2: Checking Harness And Connector (Accelerator Pedal Position Sensor ECM)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance (Check for short) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      VPA (A19-6) or VPA (E8-18) - Body ground	10 kΩ or higher
      EPA (A19-5) or EPA (E8-20) - Body ground
      VCPA (A19-4) or VCPA (E8-26) - Body ground
      VPA2 (A19-3) or VPA2 (E8-19) - Body ground
      EPA2 (A19-2) or EPA2 (E8-21) - Body ground
      VCP2 (A19-1) or VCP2 (E8-27) - Body ground

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

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY 
4. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) 
   1. Connect an intelligent tester to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear DTCs (See DTC CHECK / CLEAR  ).
   4. Start the engine.
   5. Allow the engine to idle for 15 seconds.
   6. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   7. Read DTCs.

      Result 

      RESULT REFERENCE
      
      

      Display (DTC Output)	Proceed To
      P2121	A
      No output	B

   B : SYSTEM OK 

   A: REPLACE ECM