SFI SYSTEM, Diagnostic DTC:P2685

DTC Code DTC Name
P2685 Actuator Supply Voltage "C" Circuit Low

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2685

Actuator Supply Voltage "C" Circuit Low

Abnormal power supply 3 voltage.

  • Throttle body with motor assembly

  • Accelerator pedal sensor assembly

  • Wire harness or connector

  • ECM

Comes on

DTC stored

WIRING DIAGRAM

  • Refer to DTC P0121 for throttle body with motor assembly circuit.

    Click here

  • Refer to DTC P0222 for the accelerator pedal sensor assembly circuit.

    Click here

CAUTION / NOTICE / HINT

Note:

  • If the throttle body with motor assembly is repaired or replaced, perform BPM Learning Reset.

    Click here

  • If the Accelerator pedal sensor assembly is replaced, perform Accel Pedal Learning Value Reset.

    Click here

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2685)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs.

      Powertrain > Engine > Trouble Codes

      Result

      Result

      Proceed to

      DTC P2685 is output

      A

      DTC P2685 and other DTCs are output

      B
      Tip:

      If DTC P2685 and P0562 or P0563 are output simultaneously, troubleshoot for DTC P0562 or P0563 first.

    B

    GO TO DTC CHART

    Click here

    A

  2. READ VALUE USING GTS (SYSTEM SUPPLY VOLTAGE (CMM))

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / System Supply Voltage (CMM).

      Powertrain > Engine > Data List

      Tester Display

      System Supply Voltage (CMM)

    5. Read the value.

      Standard

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    GO TO DTC P0562

    Click here

    OK

  3. READ VALUE USING GTS (5V SENSOR NO.3 SUPPLY VOLTAGE (CMM))

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / 5V Sensor No.3 Supply Voltage (CMM).

      Powertrain > Engine > Data List

      Tester Display

      5V Sensor No.3 Supply Voltage (CMM)

    5. Read the value.

      OK

      4750 to 5250 mV

    Result

    Proceed to

    OK

    NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    NG

  4. CHECK TERMINAL VOLTAGE (POWER SOURCE OF THROTTLE POSITION SENSOR)

    A340584C01

    *a

    Front view of wire harness connector

    (to Throttle Body with Motor Assembly)

    1. Disconnect the throttle body with motor assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B54-4 (VCTA) - B54-3 (ETA)

      Ignition switch ON

      4.5 to 5.5 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)Click here

    OK

  5. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ACCELERATOR PEDAL POSITION SENSOR)

    A340580C01

    *a

    Front view of wire harness connector

    (to Accelerator Pedal Sensor Assembly)

    1. Disconnect the accelerator pedal sensor assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A21-1 (+B) - Body ground

      Ignition switch ON

      4.75 to 5.25 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

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

    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

      A21-1 (+B) - A35-46 (+B)

      Always

      Below 1 Ω

      A21-2 (S2) - A35-34 (S2)

      Always

      Below 1 Ω

      A21-3 (M2-) - A35-44 (M2-)

      Always

      Below 1 Ω

      A21-4 (KD) - A35-36 (KD)

      Always

      Below 1 Ω

      A21-5 (M1-) - A35-47 (M1-)

      Always

      Below 1 Ω

      A21-6 (S1) - A35-35 (S1)

      Always

      Below 1 Ω

      A21-1 (+B) or A35-46 (+B) - Body ground and other terminals

      Always

      10 kΩ or higher

      A21-2 (S2) or A35-34 (S2) - Body ground and other terminals

      Always

      10 kΩ or higher

      A21-3 (M2-) or A35-44 (M2-) - Body ground and other terminals

      Always

      10 kΩ or higher

      A21-4 (KD) or A35-36 (KD) - Body ground and other terminals

      Always

      10 kΩ or higher

      A21-5 (M1-) or A35-47 (M1-) - Body ground and other terminals

      Always

      10 kΩ or higher

      A21-6 (S1) or A35-35 (S1) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

    1. Replace the accelerator pedal sensor assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2685)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for a few minutes.

    6. Perform the drive test.

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Check for DTCs.

      Powertrain > Engine > Trouble Codes

    Result

    Result

    Proceed to

    DTC P2685 is output

    A

    DTCs are not output

    B
    A

    REPLACE ECM

    Click here

    B

    END

  9. CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)

    1. Disconnect the throttle body with motor assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B54-4 (VCTA) - B55-34 (VCTA)

      Always

      Below 1 Ω

      B54-5 (VTA) - B55-10 (VTA)

      Always

      Below 1 Ω

      B54-6 (VTA2) - B55-11 (VTA2)

      Always

      Below 1 Ω

      B54-3 (ETA) - B55-22 (ETA)

      Always

      Below 1 Ω

      B54-4 (VCTA) or B55-34 (VCTA) - Body ground and other terminals

      Always

      10 kΩ or higher

      B54-5 (VTA) or B55-10 (VTA) - Body ground and other terminals

      Always

      10 kΩ or higher

      B54-6 (VTA2) or B55-11 (VTA2) - Body ground and other terminals

      Always

      10 kΩ or higher

      B54-3 (ETA) or B55-22 (ETA) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

    1. Replace the throttle body with motor assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P2685)Click here