Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR)

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance


DESCRIPTION

Refer to DTC P2120 (LandCruiser RM0000018WX0AMX_01.html).

P2121
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 5 seconds or more.
  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sens. No.1 Volt %, and Accel Sens. No.2 Volt %.
  2. Slowly depress the accelerator pedal until Accel Sens. No.1 Volt % is approximately 30% and Accel Sens. No.2 Volt % is approximately 46%, then slowly release the accelerator pedal.
Either of the following conditions is met (1 trip detection logic):
  1. Difference between VPA and VPA2 is less than 0.4 V, or higher than 1.2 V. (learned value of accelerator off position)
  2. Difference between VPA and VPA2 is greater than or equal to the specified value.
  1. Accelerator pedal sensor assembly
  2. ECM

Related Data List
DTC No.
Data List
P2121
  1. Accel Position
  2. Accel Sens. No.1 Volt %
  3. Accel Sens. No.2 Volt %

WIRING DIAGRAM

Refer to DTC P2120 (LandCruiser RM0000018WX0AMX_02.html).

INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0AUX.html) and initialization (LandCruiser RM000000TIN08HX.html).
HINT:
Read freeze frame data using the GTS. Freeze frame data records 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, and other data from the time the malfunction occurred.
1.READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG) and turn the GTS on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sens. No.1 Volt % and Accel Sens. No.2 Volt %.

  1. Read the values.

    Standard Voltage:
    Accelerator Pedal
    		Accel Sens. No.1 Volt %
    		Accel Sens. No.2 Volt %
    Released
    		10 to 22%
    		24 to 40%
    Depressed
    		52 to 90%
    		68 to 99%
    Text in Illustration
    *1
    		Accelerator Pedal Assembly
    *a
    		Depressed
    *b
    		Released
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B


OK
Go to step 5
NG


2.REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

  1. Replace the accelerator pedal sensor assembly (LandCruiser RM00000463000CX.html).


NEXT


3.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

  1. Turn the engine switch off and wait for at least 30 seconds.

  1. Wait for 5 seconds after turning the engine switch on (IG).

  1. Turn the GTS on.

  1. Operate the accelerator pedal in accordance with the following procedure [B].

    1. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Accel Sens. No.1 Volt %, and Accel Sens. No.2 Volt %.

    2. Slowly depress the accelerator pedal until Accel Sens. No.1 Volt % is approximately 30% and Accel Sens. No.2 Volt % is approximately 46%, then slowly release the accelerator pedal.

  1. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P2121 is output
    		A
    No DTC is output
    		B


B
END
A


4.REPLACE ECM

  1. Replace the ECM (LandCruiser RM0000013Z002DX.html).


NEXT


5.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

  1. Turn the engine switch off and wait for at least 30 seconds.

  1. Wait for 5 seconds after turning the engine switch on (IG).

  1. Turn the GTS on.

  1. Operate the accelerator pedal in accordance with the following procedure [B].

    1. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Accel Sens. No.1 Volt %, and Accel Sens. No.2 Volt %.

    2. Slowly depress the accelerator pedal until Accel Sens. No.1 Volt % is approximately 30% and Accel Sens. No.2 Volt % is approximately 46%, then slowly release the accelerator pedal.

  1. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  1. Confirm that the DTC is not output again.


NEXT

END