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

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

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

READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION)

REPLACE ACCELERATOR PEDAL ROD (ACCELERATOR PEDAL POSITION SENSOR)

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 RM000000PFY0ODX_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P2121
The difference between VPA and VPA2 is below 0.4 V, or higher than 1.2 V for 0.5 seconds (1 trip detection logic).
  1. Accelerator pedal position sensor
  2. ECM

FAIL-SAFE

The accelerator pedal position 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 fail-safe mode. In fail-safe 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 position of 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 a normal condition.

WIRING DIAGRAM

Refer to DTC P2120 (RAV4_ACA30 RM000000PFY0ODX_08.html).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and 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 RM000000PDF0FMX.html)
A


2.READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae 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 to ON and 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 5.0 V


NG
Go to step 3
OK

CHECK FOR INTERMITTENT PROBLEMS (RAV4_ACA30 RM000000PDQ0T1X.html)

3.REPLACE ACCELERATOR PEDAL ROD (ACCELERATOR PEDAL POSITION SENSOR)

  1. Replace the accelerator pedal rod (RAV4_ACA30 RM0000017UL01VX.html).


NEXT


4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (RAV4_ACA30 RM000000PDK0WCX.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
SYSTEM OK
A

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)