P2123

P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2120-111: Throttle / Pedal Position Sensor / Switch "D" Circuit

DTC P2120-111 - Throttle / Pedal Position Sensor / Switch "D" Circuit

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

DTC P2121-114 - Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance

DTC P2125-112 - Throttle / Pedal Position Sensor / Switch "E" Circuit

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

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

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. It has 2 sensors per sensor unit. One is used to detect the accelerator pedal position and the other to detect a malfunction in the sensor itself. In the accelerator pedal position sensor, the voltage applied to terminals VPA1 and VPA2 of the HV control ECU varies between 0 and 5 V in accordance with the accelerator pedal position. Terminal VPA2 is used to detect a malfunction in the sensor itself. The HV control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received from terminals VPA1 and VPA2.









WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE OF TECHSTREAM (ACCEL POS #1 AND #2)
(a) Connect the Techstream to the DLC3.





(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1 and Accel Pedal Pos #2.
(d) Read the voltage for the accelerator pedal position sensor data.
Result:






OK -- CHECK FOR INTERMITTENT PROBLEMS
NG -- Continue to next step.
2. INSPECT HYBRID VEHICLE CONTROL ECU





(a) Disconnect the A12 accelerator pedal position sensor connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- Continue to next step.
3. INSPECT HYBRID VEHICLE CONTROL ECU





(a) Connect the accelerator pedal position sensor connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






OK -- REPLACE HYBRID VEHICLE CONTROL ECU
NG -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - ACCELERATOR PEDAL POSITION SENSOR)





(a) Turn the ignition switch OFF.
(b) Disconnect the H34 HV control ECU connector.
(c) Disconnect the A12 accelerator pedal position sensor connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:





(e) Turn the ignition switch OFF.
(f) Measure the resistance according to the value(s) in the table.
Standard Resistance (Check for open):






Standard Resistance (Check for short):






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ACCELERATOR PEDAL ROD ASSEMBLY