Inspection Procedure

Fig 1: Identifying Accelerator Pedal Position

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1. Connect the hand-held tester to the DLC3.
2. Turn the power switch ON (IG).
3. Turn the hand-held tester ON.
4. On the hand-held tester, enter the following menus:

   DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST.

5. Read the ACCEL POS #1 and #2 values on the hand-held tester with the engine stopped.

OK: Changes with accelerator pedal pressure 

OK: Go to step   k 

NG: Go to Next Step 

Fig 2: Locating H16 HV Control ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H16 HV control ECU connector.
2. Disconnect the A13 accelerator pedal position sensor connector.
3. Turn the power switch ON (IG).
4. Measure the voltage between the terminals of the HV control ECU connector and body ground.
   1. Standard: 
   VOLTAGE CHECK
   
   

   Tester Connection	Specified Condition
   VPA1 (H16-26) - Body ground	Below 1 V
   VCP1 (H16-25) - Body ground	Below 1 V
   EP1 (H16-27) - Body ground	Below 1 V
   VPA2 (H16-34) - Body ground	Below 1 V
   VCP2 (H16-33) - Body ground	Below 1 V
   EP2 (H16-35) - Body ground	Below 1 V

   Fig 3: Identifing Accelerator Pedal Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Turn the power switch OFF.
6. Check the resistance between the wire harness side connectors.
   1. Standard (Check for open): 
   RESISTANCE CHECK
   
   

   Tester Connection	Specified Condition
   VPA1 (H16-26) - VPA (A13-6)	Below 1 Ω
   VCP1 (H16-25) - VCPA (A13-4)	Below 1 Ω
   EP1 (H16-27) - EPA (A13-5)	Below 1 Ω
   VPA2 (H16-34) - VPA2 (A13-3)	Below 1 Ω
   VCP2 (H16-33) - VCP2 (A13-1)	Below 1 Ω
   EP2 (H16-35) - EP2 (A13-2)	Below 1 Ω

   1. Standard (Check for short): 
   RESISTANCE CHECK (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   VPA1 (H16-26) or VPA (A13-6) - Body ground	10 kΩ or higher
   VCP1 (H16-25) or VCPA (A13-4) - Body ground	10 kΩ or higher
   EP1 (H16-27) or EPA (A13-5) - Body ground	10 kΩ or higher
   VPA2 (H16-34) or VPA2 (A13-3) - Body ground	10 kΩ or higher
   VCP2 (H16-33) or VCP2 (A13- 1) - Body ground	10 kΩ or higher
   EP2 (H16-35) or EP2 (A13-2) - Body ground	10 kΩ or higher

7. Reconnect the accelerator pedal position sensor connector.
8. Reconnect the HV control ECU connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

9. INSPECT HYBRID VEHICLE CONTROL ECU (VCP1 OR VCP2 VOLTAGE) 
   Fig 4: Disconnecting Accelerator Pedal Position Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the A13 accelerator pedal position sensor connector.
   2. Turn the power switch ON (IG).
   3. Measure the voltage between the terminals of the HV control ECU connector.
      1. Standard: 
      VOLTAGE CHECK
      
      

      Tester Connection	Specified Condition
      VCP1 (H16-25) - EP1 (H16-27)	4.5 to 5.5 V
      VCP2 (H16-33) - EP2 (H16-35)	4.5 to 5.5 V

   4. Reconnect the accelerator pedal position sensor connector.
   Fig 5: Locating H16 HV Control ECU Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE HYBRID VEHICLE CONTROL ECU (See  HYBRID VEHICLE CONTROL ECU  ) 

   OK: Go to Next Step 

10. REPLACE ACCELERATOR PEDAL ROD ASSY (See  ACCELERATOR PEDAL ROD ASSY  ) 

    GO: Go to Next Step: Go to Next Step 

11. CHECK IF DTC OUTPUT RECURS (DTC P2122, P2123, P2127 OR P2128) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the hand-held tester ON.
    4. On the hand-held tester, enter the following menus: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO /CURRENT CODES.
    5. Perform a simulation test.
    6. Read DTCs.
       1. Result: DTC P2122, P2123, P2127 or P2128 is not output again 

    YES: SYSTEM OK 

    NO: REPLACE HYBRID VEHICLE CONTROL ECU (See  HYBRID VEHICLE CONTROL ECU  )