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, as well as other data from the time when a malfunction occurred.

Hand-held tester: 

1. Connect hand-held tester, and read the voltage for accelerator pedal position sensor data. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON and push the hand-held tester main switch ON.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS / ACCEL POS #1 and ACCEL POS #2.

   CHECK: 

   Read the voltage for the accelerator pedal position sensor data.

   OK: 

   VOLTAGE CHECK SPECIFIED CONDITION
   
   

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

   Fig 1: Depressing And Releasing Accelerator Pedal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. NG : Go to Next Step. 
2. Check for open and short in harness and connector between accelerator pedal position sensor and ECM. 

   PREPARATION: 

   1. Disconnect the A13 accelerator pedal position sensor connector.
   2. Disconnect the E10 ECM connector.

   CHECK: 

   Measure the resistance between the wire harness side connectors.

   Fig 2: Identifying A13 Accelerator Pedal Position Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   1. Standard (Check for open): 
      RESISTANCE CHECK SPECIFIED CONDITION (CHECK FOR OPEN)
      
      

      Tester Connection	Specified Condition
      VPA1 (A13-5) - VPA (E10-22)	Below 1 Ω
      EP1 (A13-3) - EPA (E10-28)	Below 1 Ω
      VCP1 (A13-6) - VCPA (E10-26)	Below 1 Ω
      VPA2 (A13-2) - VPA2 (E10-23)	Below 1 Ω
      EP2 (A13-1) - EPA2 (E10-29)	Below 1 Ω
      VCP2 (A13-4) - VCP2 (E10-27)	Below 1 Ω

      Fig 3: Disconnecting E10 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Standard (Check for short): 
      RESISTANCE CHECK SPECIFIED CONDITION (CHECK FOR SHORT)
      
      

      Tester Connection	Specified Condition
      VPA1 (A13-5) or VPA (E10-22) - Body ground	10 kΩ or higher
      EP1 (A13-3) or EPA (E10-28) - Body ground	10 kΩ or higher
      VCP1 (A13-6) or VCPA (E10-26) - Body ground	10 kΩ or higher
      VPA2 (A13-2) or VPA2 (E10-23) - Body ground	10 kΩ or higher
      EP2 (A13-1) or EPA2 (E10-29) - Body ground	10 kΩ or higher
      VCP2 (A13-4) or VCP2 (E10-27) - Body ground	10 kΩ or higher

   1. NG : Repair or replace harness or connector. 
   2. OK : Replace accelerator pedal assembly. 

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

1. Check voltage between terminals VPA and EPA, VPA2 and EPA2 of ECM connector. 

   PREPARATION: 

   Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between the specified terminals of the E10 ECM connector.

   OK: 

   Fig 4: Voltage Check Specified Condition

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 5: Identifying Terminals VPA And EPA, VPA2 And EPA2 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. NG : Go to Next Step. 
2. Check for open and short in harness and connector between accelerator pedal position sensor and ECM. 

   PREPARATION: 

   1. Turn the ignition switch ON.
   2. Disconnect the A13 accelerator pedal position sensor connector.

   CHECK: 

   Measure the voltage between the specified terminals of the E10 ECM connector.

   OK 

   VOLTAGE CHECK SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   VCPA (E10-26) - EPA (E10-28)	4.5 to 5.5 V
   VCP2 (E10-27) - EPA2 (E10-29)	4.5 to 5.5 V

   Fig 6: Disconnecting A13 Accelerator Pedal Position Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Replace accelerator pedal assembly.