SFI SYSTEM, Diagnostic DTC:P2138

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

DESCRIPTION

Refer to DTC P2122.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2138

Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

The difference in output between accelerator pedal position sensors 1 and 2 is outside the threshold range (1 trip detection logic).

  • Accelerator pedal sensor assembly

  • Accelerator pedal sensor assembly circuit

Comes on

DTC stored

WIRING DIAGRAM

Refer to DTC P2122.

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CONFIRMATION DRIVING PATTERN

DTC P2138 is detected when the ignition switch is ON or engine running.

CAUTION / NOTICE / HINT

Note:

If any DTCs related to the crankshaft position sensor, throttle position sensor, accelerator pedal sensor assembly, manifold absolute pressure sensor and camshaft position sensor are output simultaneously, inspect the VC circuit of each component.

Tip:

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL SENSOR ASSEMBLY)

    1. Disconnect the ECM connector.

    2. Disconnect the accelerator pedal sensor assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A34-49 (VCPA) - A22-4 (VCPA)

      Always

      Below 1 Ω

      A34-47 (VPA) - A22-6 (VPA)

      Always

      Below 1 Ω

      A34-48 (EPA) - A22-5 (EPA)

      Always

      Below 1 Ω

      A34-52 (VCP2) - A22-1 (VCP2)

      Always

      Below 1 Ω

      A34-50 (VPA2) - A22-3 (VPA2)

      Always

      Below 1 Ω

      A34-51 (EPA2) - A22-2 (EPA2)

      Always

      Below 1 Ω

      A34-49 (VCPA) or A22-4 (VCPA) - Body ground

      Always

      10 kΩ or higher

      A34-47 (VPA) or A22-6 (VPA) - Body ground

      Always

      10 kΩ or higher

      A34-48 (EPA) or A22-5 (EPA) - Body ground

      Always

      10 kΩ or higher

      A34-52 (VCP2) or A22-1 (VCP2) - Body ground

      Always

      10 kΩ or higher

      A34-50 (VPA2) or A22-3 (VPA2) - Body ground

      Always

      10 kΩ or higher

      A34-51 (EPA2) or A22-2 (EPA2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR