DTC P2120, P2122, P2123, P2125, P2127, P2128, P2138; Throttle / Pedal Position Sensor / Switch "D" Circuit [12/2012 - ]: Procedure

1. Connect the Techstream to the DLC3.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Fully Depressed
   *b	Fully Released

2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Accel Sensor Out No. 1 and Accel Sensor Out No. 2.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Accel Sensor Out No. 1
   Accel Sensor Out No. 2

5. Read the value displayed on the Techstream.

   Standard Voltage

   Accelerator Pedal Operation	Accel Sensor Out No. 1	Accel Sensor Out No. 2	Difference between Accel Sensor Out No. 1 and Accel Sensor Out No. 2
   Fully Released	0.5 to 1.1 V	1.2 to 2.0 V	More than 0.02 V
   Fully Depressed	2.6 to 4.5 V	3.4 to 4.75 V

Result: 

OK 

CHECK FOR INTERMITTENT PROBLEMS:  CHECK FOR INTERMITTENT PROBLEMS [12/2012 - ] 

Result: 

NG 

See step  2

1. Disconnect the accelerator pedal sensor assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A6-6 (VPA) - A62-51 (VPA)	Always	Below 1 Ω
   A6-5 (EPA) - A62-52 (EPA)	Always	Below 1 Ω
   A6-4 (VCPA) - A62-53 (VCPA)	Always	Below 1 Ω
   A6-3 (VPA2) - A62-54 (VPA2)	Always	Below 1 Ω
   A6-2 (EPA2) - A62-55 (EPA2)	Always	Below 1 Ω
   A6-1 (VCP2) - A62-56 (VCP2)	Always	Below 1 Ω
   A6-6 (VPA) or A62-51 (VPA) - Body ground	Always	10 kΩ or higher
   A6-4 (VCPA) or A62-53 (VCPA) - Body ground	Always	10 kΩ or higher
   A6-3 (VPA2) or A62-54 (VPA2) - Body ground	Always	10 kΩ or higher
   A6-1 (VCP2) or A62-56 (VCP2) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the accelerator pedal sensor assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Accelerator Pedal Sensor Assembly)

2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A6-4 (VCPA) - A6-5 (EPA)	Ignition switch ON	4.5 to 5.5 V
   A6-1 (VCP2) - A6-2 (EPA2)	Ignition switch ON	4.5 to 5.5 V

Result: 

NG 

REPLACE ECM:  REMOVAL [12/2012 - ] 

Result: 

OK 

See step  4

1. Replace the accelerator pedal sensor assembly.

   Refer to REMOVAL [12/2012 - ]

Result: 

NEXT 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   Powertrain > Engine and ECT > Clear DTCs 

5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON.
7. Turn the Techstream on.
8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read the DTCs.

    Result

    Result	Proceed to
    DTC P2120, P2122, P2123, P2125, P2127, P2128, and/or P2138 are output	A
    DTC is not output	B

Result: 

A 

REPLACE ECM:  REMOVAL [12/2012 - ] 

Result: 

B 

END