DTC    P2120-152    Throttle / Pedal Position Sensor / Switch "D" Circuit

DTC    P2121-106    Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance

DTC    P2122-104    Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input

DTC    P2123-105    Throttle / Pedal Position Sensor / Switch "D" Circuit High Input

DTC    P2125-153    Throttle / Pedal Position Sensor / Switch "E" Circuit

DTC    P2126-109    Throttle / Pedal Position Sensor / Switch "E" Circuit Range / Performance

DTC    P2127-107    Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input

DTC    P2128-108    Throttle / Pedal Position Sensor / Switch "E" Circuit High Input

DTC    P2138-110    Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

DTC    P2138-154    Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

for Preparation Click here


DESCRIPTION

The accelerator pedal position sensor is mounted on the accelerator pedal to detect how much the pedal is depressed. This is a non-contact sensor with hall elements. There are 2 outputs from the sensor. One is used to detect the accelerator pedal position and the other is used as a confirmation to allow the detection of a malfunction in the sensor itself. Voltage is output from the accelerator pedal position sensor to terminals VPA1 and VPA2 of the power management control ECU. This voltage varies from 0 to 5 V in accordance with the accelerator pedal position. Terminal VPA2 is primarily used to detect a malfunction in the sensor itself. The power management control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA1 and VPA2.

A222964E02


DTC No.
INF Code
DTC Detection Condition
Trouble Area
P2120
152
Main sensor circuit wiring malfunction or level is not stable
  1. Wire harness or connector
  2. Accelerator pedal sensor assembly
  3. Power management control ECU
P2121
106
Internal error of the main sensor
P2122
104
Open or short to GND in the main sensor circuit
P2123
105
Short to +B in the main sensor circuit
P2125
153
Sub sensor circuit wiring malfunction or level is not stable
P2126
109
Internal error of the sub sensor
P2127
107
Open or short to GND in the sub sensor circuit
P2128
108
Short to +B in the sub sensor circuit
P2138
110
Difference between the main sensor value and sub sensor value is large.
P2138
154
Main or sub sensor circuit wiring malfunction

WIRING DIAGRAM


A169668E14


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1, Accel Pedal Pos #2.



    A251722E01

  1. Read the Data List.

    Result:
    Tester Display
    		Accelerator Pedal Condition
    		Specified Condition
    Accel Pedal Pos #1
    		Not depressed
    		8 to 28% (0.4 to 1.4 V)
    Fully depressed
    		62 to 92% (3.1 to 4.6 V)
    Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly)
    		Value changes progressively as shown in the illustration
    Accel Pedal Pos #2
    		Not depressed
    		20 to 44% (1.0 to 2.2 V)
    Fully depressed
    		78 to 100% (3.9 to 5.0 V)
    Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly)
    		Value changes progressively as shown in the illustration

    Text in Illustration 
    *a
    		Accelerator Pedal Position Sensor Output Voltage (V)
    *b
    		Accelerator Pedal Fully Released
    *c
    		Accelerator Pedal Fully depressed
    *d
    		Accelerator Pedal Turning Angle (°)

    HINT:
    5 V is described as 100% on the tester.

  1. Turn the power switch off.



NG
Go to step 2
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)  

2.CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY CONNECTOR)


    A251170E01

  1. Check the connection of the accelerator pedal sensor assembly connector A28.
    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD

    OK:
    The connector is connected securely and there are no contact problems.



NG
CONNECT SECURELY
OK


3.CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


  1. Check the connections of the power management control ECU connectors.


    A237663E01


    Text in Illustration 
    *A
    		for LHD
    		*B
    		for RHD

    OK:
    The connectors are connected securely and there are no contact problems.



NG
CONNECT SECURELY
OK


4.CHECK POWER MANAGEMENT CONTROL ECU (CHECK VOLTAGE)

  1. Disconnect connector A28 from the accelerator pedal sensor assembly.

  1. Turn the power switch on (IG).



    A218062E17

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage :
    Tester Connection
    		Switch Condition
    		Specified Condition
    A28-4 (VCP1) - A28-5 (EP1)
    		Power switch on (IG)
    		4.5 to 5.5 V
    A28-1 (VCP2) - A28-2 (EP2)
    		Power switch on (IG)
    		4.5 to 5.5 V

Text in Illustration 
*a
Front view of wire harness connector
(to Accelerator Pedal Sensor Assembly)

  1. Connect the accelerator pedal sensor assembly connector.

  1. Turn the power switch off.



NG
Go to step 7
OK


5.CHECK POWER MANAGEMENT CONTROL ECU (CHECK RESISTANCE)

  1. Disconnect connector A28 from the accelerator pedal sensor assembly.



    A218062E18

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A28-6 (VPA1) - A28-5 (EP1)
    		Power switch off
    		36.60 to 41.61 kΩ
    A28-3 (VPA2) - A28-2 (EP2)
    		Power switch off
    		36.60 to 41.61 kΩ

Text in Illustration 
*a
Front view of wire harness connector
(to Accelerator Pedal Sensor Assembly)

  1. Connect the accelerator pedal sensor assembly connector.



NG
Go to step 6
OK

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY (Click here)  

6.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR)

  1. Disconnect connector A28 from the accelerator pedal sensor assembly.



    A218011E13

  1. Disconnect connector A20 from the power management control ECU.

  1. Turn the power switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage :
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-26 (VPA1) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-27 (VPA2) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-34 (EP1) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-35 (EP2) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)
    *b
    		Front view of wire harness connector
    (to Accelerator Pedal Sensor Assembly)

    NOTICE:
    Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

  1. Turn the power switch off.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-26 (VPA1) - A28-6 (VPA1)
    		Power switch off
    		Below 1 Ω
    A20-34 (EP1) - A28-5 (EP1)
    		Power switch off
    		Below 1 Ω
    A20-27 (VPA2) - A28-3 (VPA2)
    		Power switch off
    		Below 1 Ω
    A20-35 (EP2) - A28-2 (EP2)
    		Power switch off
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-26 (VPA1) or A28-6 (VPA1) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-34 (EP1) or A28-5 (EP1) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-27 (VPA2) or A28-3 (VPA2) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-35 (EP2) or A28-2 (EP2) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher

  1. Connect the power management control ECU connector.

  1. Connect the accelerator pedal sensor assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)  

7.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ACCELERATOR PEDAL SENSOR)

  1. Disconnect connector A28 from the accelerator pedal sensor assembly.

  1. Disconnect connector A20 from the power management control ECU.

  1. Turn the power switch on (IG).



    A218011E14

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage :
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-18 (VCP1) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-34 (EP1) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-19 (VCP2) - Body ground
    		Power switch on (IG)
    		Below 1 V
    A20-35 (EP2) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)
    *b
    		Front view of wire harness connector
    (to Accelerator Pedal Sensor Assembly)

    NOTICE:
    Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

  1. Turn the power switch off.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-18 (VCP1) - A28-4 (VCP1)
    		Power switch off
    		Below 1 Ω
    A20-34 (EP1) - A28-5 (EP1)
    		Power switch off
    		Below 1 Ω
    A20-19 (VCP2) - A28-1 (VCP2)
    		Power switch off
    		Below 1 Ω
    A20-35 (EP2) - A28-2 (EP2)
    		Power switch off
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A20-18 (VCP1) or A28-4 (VCP1) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-34 (EP1) or A28-5 (EP1) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-19 (VCP2) or A28-1 (VCP2) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher
    A20-35 (EP2) or A28-2 (EP2) - Body ground and other terminals
    		Power switch off
    		10 kΩ or higher

  1. Connect the power management control ECU connector.

  1. Connect the accelerator pedal sensor assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)