Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTAT LIST / ACCEL POS #1 and #2.
4. Read the voltage for the accelerator pedal position sensor data.
   Fig 1: Depressing Accelerator Pedal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result 

   ACCEL POS #1 AND #2
   
   

   Accelerator Pedal	ACCEL POS #1	ACCEL POS #2
   Released	0.4 to 1.4 V	1.0 to 2.2 V
   Depressed	3.1 to 4.6 V	3.9 to 4.8 V

OK: CHECK FOR INTERMITTENT PROBLEMS 

NG: GO TO NEXT STEP 

1. Disconnect the A12 accelerator pedal position sensor connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   HYBRID VEHICLE CONTROL ECU
   
   

   Tester Connection	Specified Condition
   VCP1 (H34-24) - EP1 (H34-33)	4.5 to 5.5 V
   VCP2 (H34-31) - EP2 (H34-32)	4.5 to 5.5 V

   Fig 2: Inspecting Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HYBRID VEHICLE CONTROL ECU 

OK: GO TO NEXT STEP 

1. Connect the accelerator pedal position sensor connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   HYBRID VEHICLE CONTROL ECU
   
   

   Pedal Position	VPA (H34-25) - EP1 (H34-33)	VPA2 (H34-26) - EP2 (H34-32)
   Released	0.4 to 1.4 V	1.0 to 2.2 V
   Depressed	3.1 to 4.6 V	3.9 to 4.8 V

   Fig 3: Inspecting Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE HYBRID VEHICLE CONTROL ECU 

NG: GO TO NEXT STEP 

1. Turn the ignition switch OFF.
2. Disconnect the H34 HV control ECU connector.
3. Disconnect the AR accelerator pedal position sensor connector.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   HV CONTROL ECU - ACCELERATOR PEDAL POSITION SENSOR (VOLTAGE)
   
   

   Tester Connection	Specified Condition
   VPA (H34-25) - Body ground	Below 1 V
   VCP1 (H34-24) - Body ground	Below 1 V
   EP1 (H34-33) - Body ground	Below 1 V
   VPA2 (H34-26) - Body ground	Below 1 V
   VCP2 (H34-31) - Body ground	Below 1 V
   EP2 (H34-32) - Body ground	Below 1 V

5. Turn the ignition switch OFF.
6. Measure the resistance according to the value(s) in the table.

   Standard Resistance (Check for open) 

   HV CONTROL ECU - ACCELERATOR PEDAL POSITION SENSOR (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   VPA (H34-25) - VPA1 (A12-6)	Below 1 Ω
   VCP1 (H34-24) - VCP1 (A12-4)	Below 1 Ω
   EP1 (H34-33) - EP1 (A12-5)	Below 1 Ω
   VPA2 (H34-26) - VPA2 (A12-3)	Below 1 Ω
   VCP2 (H34-31) - VCP2 (A12-1)	Below 1 Ω
   EP2 (H34-32) - EP2 (A12-2)	Below 1 Ω

   Standard Resistance (Check for short) 

   HV CONTROL ECU - ACCELERATOR PEDAL POSITION SENSOR (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   VPA (H34-25) or VPA1 (A12-6) - Body ground	10 kΩ or higher
   VCP1 (H34-24) or VCP1 (A12-4) - Body ground	10 kΩ or higher
   EP1 (H34-33) or EP1 (A12-5) - Body ground	10 kΩ or higher
   VPA2 (H34-26) or VPA2 (A12-3) - Body ground	10 kΩ or higher
   VCP2 (H34-31) or VCP2 (A12-1) - Body ground	10 kΩ or higher
   EP2 (H34-32) or EP2 (A12-2) - Body ground	10 kΩ or higher

   Fig 4: Checking Harness And Connector (HV Control ECU - Accelerator Pedal Position Sensor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ACCELERATOR PEDAL ROD ASSEMBLY