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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 110 (Hybrid Control System (2WD) - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P2120-12: Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery; DTC P2120-14: Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open; DTC P2120-1C: Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range; DTC P2120-1F: Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent; DTC P2125-12: Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery; DTC P2125-14: Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open; DTC P2125-1C: Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range; DTC P2125-1F: Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent; DTC P2138-00: Throttle/Pedal Position Sensor/Switch "D"/" E" Voltage Correlation; DTC P2138-2B: Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled [12/2019 - 11/2023] >> Description

DTC P2120-12: Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery; DTC P2120-14: Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open; DTC P2120-1C: Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range; DTC P2120-1F: Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent; DTC P2125-12: Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery; DTC P2125-14: Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open; DTC P2125-1C: Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range; DTC P2125-1F: Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent; DTC P2138-00: Throttle/Pedal Position Sensor/Switch "D"/" E" Voltage Correlation; DTC P2138-2B: Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled [12/2019 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

The accelerator pedal position sensor is built into the accelerator pedal sensor assembly and detects 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 VPA and VPA2 of the hybrid vehicle 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 hybrid vehicle control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA and VPA2.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P2120-12 Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery Short to +B in the main sensor circuit:
The main sensor voltage is 4.8 V or more for 2 seconds.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2120-14 Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open Open or short to ground in the main sensor circuit:
The main sensor voltage is 0.4 V or less for 0.5 seconds.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2120-1C Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range Internal malfunction in the main sensor:
Main sensor output changes rapidly (detected when there are no circuit malfunctions such as an open or short).
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2120-1F Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent Main sensor circuit wiring malfunction or level is not stable:
Main sensor voltage is 0.4 V or less or 4.8 V or more for a certain period of time.
(Both of the following conditions are met: The main sensor voltage is 0.4 V or less for a certain period of time and 4.8 V or more for a certain period of time.)
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2125-12 Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery Short to +B in the sub sensor circuit:
Main sensor is normal and sub sensor voltage is 4.8 V or more for 2 seconds.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2125-14 Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open Open or short to ground in the sub sensor circuit:
The sub sensor voltage is 1.2 V or less for 0.5 seconds.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2125-1C Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range Internal malfunction of the sub sensor:
Sub sensor output changes rapidly (detected when there are no circuit malfunctions such as an open or short).
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2125-1F Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent Sub sensor circuit wiring malfunction or level is not stable:
When the main sensor circuit is normal, the sub sensor voltage is 1.2 V or less or 4.8 V or more for a certain period of time.
(Both of the following conditions are met: Sub sensor voltage is 1.2 V or less for a certain period of time, and the main sensor is normal and sub sensor voltage is 4.8 V or more for a certain period of time.)
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2138-00 Throttle/Pedal Position Sensor/Switch "D"/" E" Voltage Correlation Difference between the main sensor value and sub sensor value is large.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
P2138-2B Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled Main or sub sensor circuit wiring malfunction:
The difference in voltage between the main sensor and sub sensor is 0.02 V or less, or a low output malfunction continues in both the main and sub sensors for a certain period of time.
(1 trip detection logic)
  • Wire harness or connector
  • Accelerator pedal sensor assembly
  • Hybrid vehicle control ECU
Comes on Master Warning:
Comes on
RELATED DATA LIST

DTC No. Data List
P2120-12
  • Accelerator Position Sensor No. 1 Voltage %
  • Accelerator Position Sensor No. 2 Voltage %
P2120-14
P2120-1C
P2120-1F
P2125-12
P2125-14
P2125-1C
P2125-1F
P2138-00
P2138-2B