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

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)

READ VALUE USING INTELLIGENT TESTER (ACCEL SENSOR OUT NO.1 AND ACCEL SENSOR OUT NO.2)

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

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


DESCRIPTION


HINT:
Refer to DTC P2120 (RAV4_ACA30 RM000000PFY0HKX_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P2121
Either conditions (1) or (2) met for 0.5 seconds (1 trip detection logic):
  1. (1) Difference between VPA and VPA2 is less than 0.4 V, or more than 1.2 V. (learned value of accelerator off position)
  2. (2) Difference between VPA and VPA2 is greater than or equal to the specified value.
  1. Accelerator pedal sensor assembly
  2. ECM

FAIL-SAFE

The accelerator pedal sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal position to allow the vehicle to continue driving. If both circuits malfunction, the ECM regards the accelerator pedal as being fully released. In this case, the throttle valve remains closed as if the engine is idling. If a pass condition is detected and then the ignition switch is turned off, the fail-safe operation stops and the system returns to normal.

WIRING DIAGRAM

Refer to DTC P2120 (RAV4_ACA30 RM000000PFY0HKX_08.html).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P2121 is output
    		A
    DTC P2121 and other DTCs are output
    		B
    HINT:
    If any DTCs other than P2121 are output, troubleshoot those DTCs first.


B
GO TO DTC CHART (RAV4_ACA30 RM000000PDF0FLX.html)
A


2.READ VALUE USING INTELLIGENT TESTER (ACCEL SENSOR OUT NO.1 AND ACCEL SENSOR OUT NO.2)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Engine Control System.Sfi System. Dtc P2121 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sensor Out No.1 and Accel Sensor Out No.2.

  1. Read the values displayed on the tester.

    Standard Voltage:
    Accelerator Pedal Operation
    		Accel Sensor Out No.1
    		Accel Sensor Out No.2
    Released
    		0.5 to 1.1 V
    		1.2 to 2.0 V
    Depressed
    		2.6 to 4.5 V
    		3.4 to 4.98 V


NG
Go to step 3
OK

CHECK FOR INTERMITTENT PROBLEMS (RAV4_ACA30 RM000000PDQ0AIX.html)

3.REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

  1. Replace the accelerator pedal sensor assembly (RAV4_ACA30 RM0000017UL01RX.html).


NEXT


4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Clear the DTCs (RAV4_ACA30 RM000000PDK0VSX.html).

  1. Start the engine.

  1. Allow the engine to idle for 15 seconds.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P2121 is output
    		A
    DTC is not output
    		B


B
END
A

REPLACE ECM (RAV4_ACA30 RM0000017UO01FX.html)