Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

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

CHECK WIRE HARNESS (ECM - ACCELERATOR PEDAL POSITION SENSOR)

CHECK ECM (VCPA, VCP2 VOLTAGE)

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

When not using intelligent tester:

CHECK ECM (VPA, VPA2 VOLTAGE)

CHECK WIRE HARNESS (ECM - ACCELERATOR PEDAL POSITION SENSOR)

CHECK ECM (VCPA, VCP2 VOLTAGE)

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

DTC P2120/19 Throttle / Pedal Position Sensor / Switch "D" Circuit

DTC P2122/19 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input

DTC P2123/19 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input

DTC P2125/19 Throttle / Pedal Position Sensor / Switch "E" Circuit

DTC P2127/19 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input

DTC P2128/19 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input

DTC P2138/19 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation


DESCRIPTION

HINT:
  1. This is the repair procedure for the accelerator pedal position sensor.
  2. This electrical throttle system does not use a throttle cable.
  3. This accelerator pedal position sensor is a non-contact type.
The accelerator pedal position sensor is mounted on the accelerator pedal and detects the opening angle of the accelerator pedal. Since this sensor is electronically controlled with Hall-effect elements, accurate control and reliability can be obtained. It has 2 sensors to detect the accelerator position and malfunctions of the accelerator position sensor.
In the accelerator pedal position sensor, the voltage applied to pedal terminals VPA and VPA2 of the ECM changes between 0 V and 5 V in proportion to the opening angle of the accelerator pedal. VPA is used to detect the actual accelerator pedal opening angle, which is used for the engine control. VPA2 is used to detect information about the opening angle, which is used for detecting malfunctions.
The ECM judges the current opening angle of the accelerator pedal using signals from terminals VPA and VPA2, and the ECM controls the throttle motor based on these signals.

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit


DTC No.
DTC Detection Condition
(All of following are 1 trip detection logic)
Trouble Area
P2120/19
Condition (a) continues for 0.5 sec. or more:
(a) VPA is 0.2 V or less or VPA is 4.8 V or more
  1. Accelerator pedal position sensor
  2. Accelerator pedal
  3. Accelerator pedal rod (arm) deformed
  4. ECM
P2122/19
VPA is 0.2 V or less for 0.5 sec. or more when VPA2 output indicates that accelerator pedal is opened
  1. Accelerator pedal position sensor
  2. Open in VCPA circuit
  3. VPA circuit open or ground short
  4. Accelerator pedal
  5. Accelerator pedal rod (arm) deformed
  6. ECM
P2123/19
Condition (a) continues for 2.0 sec. or more:
(a) VPA is 4.8 V or more
  1. Accelerator pedal position sensor
  2. Open in EPA circuit
  3. Accelerator pedal
  4. Accelerator pedal rod (arm) deformed
  5. ECM
P2125/19
Condition (a) continues for 0.5 sec. or more:
(a) (VPA2 is 0.5 V or less) or (VPA2 is 4.8 V or more)
  1. Accelerator pedal position sensor
  2. Accelerator pedal
  3. Accelerator pedal rod (arm) deformed
  4. ECM
P2127/19
VPA2 is 0.5 V or less for 0.5 sec. or more when VPA output indicates that accelerator pedal is opened
  1. Accelerator pedal position sensor
  2. Open in VCP2 circuit
  3. VPA2 circuit open or ground short
  4. Accelerator pedal
  5. Accelerator pedal rod (arm) deformed
  6. ECM
P2128/19
Conditions (a) and (b) continue for 2.0 sec. or more:
(a) VPA2 is 4.8 V or more
(b) VPA is 0.2 V or more and VPA is 3.45 V or less
  1. Accelerator pedal position sensor
  2. Open in EPA2 circuit
  3. Accelerator pedal
  4. Accelerator pedal rod (arm) deformed
  5. ECM
P2138/19
Condition (a) or (b) continues for 2.0 sec. or more:
(a) Difference between VPA and VPA2 is 0.02 V or less
(b) VPA is 0.2 V or less and VPA2 is 0.5 V or less
  1. VPA and VPA2 circuit are short-circuited
  2. Accelerator pedal position sensor
  3. Accelerator pedal
  4. Accelerator pedal rod (arm) deformed
  5. ECM

HINT:
When DTC P2120/19, P2122/19, P2123/19, P2125/19, P2127/19, P2128/19 or P2138/19 is detected, check the output voltage of the accelerator pedal position sensor by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / Accel Position 1 and Accel Position 2.

-
Accelerator pedal position expressed as voltage output
-
Accelerator pedal released
Accelerator pedal depressed
Trouble Area
Accelerator Position No.1
Accelerator Position No. 2
Accelerator Position No. 1
Accelerator Position No. 2
VCP circuit open
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
VPA circuit open or ground short
0 to 0.2 V
1.4 to 1.8 V
0 to 0.2 V
3.7 to 5.0 V
VPA2 circuit open or ground short
0.6 to 1.0 V
0 to 0.2 V
2.9 to 4.2 V
0 to 0.2 V
EP circuit open
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
HINT:
Accelerator pedal positions are expressed as voltages.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit


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 P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  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
Go to step 5
NG


2.CHECK WIRE HARNESS (ECM - ACCELERATOR PEDAL POSITION SENSOR)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  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
    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


3.CHECK ECM (VCPA, VCP2 VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  1. Disconnect the A22 sensor connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E4-26 (VCPA) - E4-28 (EPA)
    		4.5 to 5.0 V
    E4-27 (VCP2) - E4-29 (EPA2)
    		4.5 to 5.0 V


NG
REPLACE ECM
OK


4.REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

NEXT


5.READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

  1. Clear the DTC (Toyota Fortuner RM0000012WY005X.html).

  1. Start the engine.

  1. Drive the engine at idle for 15 seconds or more.

  1. Read the DTC (Toyota Fortuner RM0000012WY005X.html).

    Result:
    Display (DTC output)
    		Proceed to
    P2120/19, P2122/19, P2123/19, P2125/19, P2127/19, P2128/19 or P2138/19 is output again
    		A
    P2120/19, P2122/19, P2123/19, P2125/19, P2127/19, P2128/19 or P2138/19 is not output
    		B


B
SYSTEM OK
A

REPLACE ECM


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 P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  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 (ECM - ACCELERATOR PEDAL POSITION SENSOR)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  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) - E5-27 (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
    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


3.CHECK ECM (VCPA, VCP2 VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P2120/19 Throttle / Pedal Position Sensor / Switch D Circuit

  1. Disconnect the A22 sensor connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E4-26 (VCPA) - E4-28 (EPA)
    		4.5 to 5.0 V
    E4-27 (VCP2) - E4-29 (EPA2)
    		4.5 to 5.0 V


NG
REPLACE ECM
OK


4.REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

NEXT


5.READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

  1. Clear the DTC (Toyota Fortuner RM0000012WY005X.html).

  1. Start the engine.

  1. Drive the engine at idle for 15 seconds or more.

  1. Read the DTC (Toyota Fortuner RM0000012WY005X.html).

    Result:
    Display (DTC output)
    		Proceed to
    P2120/19, P2122/19, P2123/19, P2125/19, P2127/19, P2128/19 or P2138/19 is output again
    		A
    P2120/19, P2122/19, P2123/19, P2125/19, P2127/19, P2128/19 or P2138/19 is not output
    		B


B
SYSTEM OK
A

REPLACE ECM