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SFI SYSTEM, Diagnostic DTC:P2102, P2103

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DTC Code DTC Name
P2102 Throttle Actuator Control Motor Circuit Low
P2103 Throttle Actuator Control Motor Circuit High
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DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle with motor body assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

Tip:

This Electronic Throttle Control System (ETCS) does not use a throttle cable.

DTC No. DTC Detection Condition Trouble Area
P2102

Both of the following conditions continue for 2.0 seconds (1 trip detection logic):

(a) The throttle actuator duty ratio is 80% or more.

(b) The throttle actuator current is below 0.5 A.

  • Open in throttle actuator circuit

  • Throttle actuator (built into throttle with motor body assembly)

  • ECM
P2103

Either of the following conditions is met (1 trip detection logic):


  • A hybrid IC diagnosis signal failure.

  • A hybrid IC current limiter port failure.

  • Short in throttle actuator circuit

  • Throttle actuator (built into throttle with motor body assembly)

  • Throttle with motor body assembly

  • Throttle valve

  • ECM
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MONITOR DESCRIPTION

The ECM monitors the electrical current through the electronic actuator and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function properly (for example, if the throttle actuator is stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.

Example:

When the electrical current is below 0.5 A and the throttle actuator duty ratio is 80% or more, the ECM interprets this as the current being outside the standard range, illuminates the MIL and stores a DTC.

If the malfunction is not repaired successfully, a DTC is stored when the engine is quickly revved to a high engine speed several times after the engine is started and has idled for 5 seconds.

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MONITOR STRATEGY

Required Sensors/Components Throttle actuator (throttle with motor body assembly)
Frequency of Operation Continuous
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CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON and turn the tester on.

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the tester on [A].

  6. Start the engine.

  7. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].

  8. Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.

  9. Enter the following menus: Powertrain / Engine and ECT / DTC [C].

  10. Read pending DTCs.

    Tip:

    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P2102 or P2103.

  13. Check the DTC judgment result.

    Tester Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    Tip:

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again and, if necessary, drive the vehicle for a period of time.

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FAIL-SAFE

When any of these DTCs or other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

A01VK9RE02
Table 2. for RHD
*a (Shielded)
*b Throttle Position Sensor (built into throttle with motor body assembly)
Table 1. for LHD *a (Shielded) *b Throttle Position Sensor (built into throttle with motor body assembly)
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Tip:

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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.

  • The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the intelligent tester. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.

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PROCEDURE


  1. Click here

    INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)


    1. Inspect the throttle with motor body assembly (Click here)

      Tip:

      Perform "Inspection After Repairs" after replacing the throttle with motor body assembly (Click here).


  2. Click here

    CHECK HARNESS AND CONNECTOR (THROTTLE WITH MOTOR BODY ASSEMBLY - ECM)


    1. Disconnect the throttle with motor body assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Table 3. for LHD
      Tester Connection Condition Specified Condition
      B29-2 (M+) - B22-60 (M+) Always Below 1 Ω
      B29-1 (M-) - B22-30 (M-) Always Below 1 Ω
      B29-2 (M+) or B22-60 (M+) - Body ground Always 10 kΩ or higher
      B29-1 (M-) or B22-30 (M-) - Body ground Always 10 kΩ or higher
      Table 4. for RHD
      Tester Connection Condition Specified Condition
      B29-2 (M+) - B23-60 (M+) Always Below 1 Ω
      B29-1 (M-) - B23-30 (M-) Always Below 1 Ω
      B29-2 (M+) or B23-60 (M+) - Body ground Always 10 kΩ or higher
      B29-1 (M-) or B23-30 (M-) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)


    1. Check for foreign objects between the throttle valve and the housing.

      OK
      No foreign objects between throttle valve and housing.
      Tip:

      Perform "Inspection After Repairs" after cleaning the throttle with motor body assembly (Click here).


    • OKClick here
    • NG

      REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY

  4. Click here

    INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE VALVE)


    1. Check if the throttle valve opens and closes smoothly.

      OK
      Throttle valve opens and closes smoothly.
      Tip:

      Perform "Inspection After Repairs" after replacing the throttle with motor body assembly (Click here).