Dtc P2121/19 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (ACCEL POSITION 1, ACCEL POSITION 2)

CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM)

When not using intelligent tester:

CHECK ECM (VPA, VPA2 VOLTAGE)

CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM)

DTC P2121/19 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance


DESCRIPTION

HINT:
This is the repair procedure for the accelerator pedal position sensor.
Refer to DTC P2120/19 (Toyota Fortuner RM0000012WN006X_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P2121/19
Condition 1 continues for 2 seconds:
  1. Difference between VPA1 and VPA2 exceeds the threshold
    (1 trip detection logic)
  1. Accelerator pedal position sensor circuit
  2. Accelerator pedal position sensor
  3. ECM

WIRING DIAGRAM

Refer to DTC P2120/19 (Toyota Fortuner RM0000012WN006X_02.html).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.
NOTICE:
If the ECM is replaced, the new ECM needs initialization (Toyota Fortuner RM0000012X2005X.html).

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (ACCEL POSITION 1, ACCEL POSITION 2)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2121/19 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Accel Position 1 and Accel Position 2.

  1. Read the values.

    Standard voltage:
    Accelerator Pedal
    		Accel Position 1
    		Accel Position 2
    Released
    		0.6 to 1.0 V
    		1.4 to 1.8 V
    Depressed
    		2.9 to 4.2 V
    		3.7 to 5.0 V


OK
REPLACE ECM
NG


2.CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2121/19 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Disconnect the A22 sensor connector.

  1. Disconnect the E4 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A22-1 (VCP2) - E4-27 (VCP2)
    		Below 1 Ω
    A22-2 (EP2) - E4-29 (EPA2)
    		Below 1 Ω
    A22-3 (VPA2) - E4-23 (VPA2)
    		Below 1 Ω
    A22-4 (VCP1) - E4-26 (VCPA)
    		Below 1 Ω
    A22-5 (EP1) - E4-28 (EPA)
    		Below 1 Ω
    A22-6 (VPA1) - E4-22 (VPA)
    		Below 1 Ω
    A22-1 (VCP2) or E4-27 (VCP2) - Body ground
    		10 kΩ or higher
    A17-2 (EP2) or E4-29 (EPA2) - Body ground
    		10 kΩ or higher
    A22-3 (VPA2) or E4-23 (VPA2) - Body ground
    		10 kΩ or higher
    A22-4 (VCP1) or E4-26 (VCPA) - Body ground
    		10 kΩ or higher
    A22-5 (EP1) or E4-28 (EPA) - Body ground
    		10 kΩ or higher
    A22-6 (VPA1) or E4-22 (VPA) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY


When not using intelligent tester:

1.CHECK ECM (VPA, VPA2 VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2121/19 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Accelerator Pedal Condition
    		Specified Condition
    E4-22 (VPA) - E4-28 (EPA)
    		Released
    		0.6 to 1.0 V
    Depressed
    		2.9 to 4.2 V
    E4-23 (VPA2) - E4-29 (EPA2)
    		Released
    		1.4 to 1.8 V
    Depressed
    		3.7 to 5.0 V


OK
REPLACE ECM
NG


2.CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2121/19 Throttle / Pedal Position Sensor / Switch D Circuit Range / Performance

  1. Disconnect the A22 sensor connector.

  1. Disconnect the E4 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A22-1 (VCP2) - E4-27 (VCP2)
    		Below 1 Ω
    A22-2 (EP2) - E4-49 (EPA2)
    		Below 1 Ω
    A22-3 (VPA2) - E4-23 (VPA2)
    		Below 1 Ω
    A22-4 (VCP1) - E4-24 (VCPA)
    		Below 1 Ω
    A22-5 (EP1) - E4-28 (EPA)
    		Below 1 Ω
    A22-6 (VPA1) - E4-22 (VPA)
    		Below 1 Ω
    A22-1 (VCP2) or E4-27 (VCP2) - Body ground
    		10 kΩ or higher
    A22-2 (EP2) or E4-29 (EPA2) - Body ground
    		10 kΩ or higher
    A22-3 (VPA2) or E4-23 (VPA2) - Body ground
    		10 kΩ or higher
    A22-4 (VCP1) or E4-26 (VCPA) - Body ground
    		10 kΩ or higher
    A22-5 (EP1) or E4-28 (EPA) - Body ground
    		10 kΩ or higher
    A22-6 (VPA1) or E4-22 (VPA) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY