SFI SYSTEM, Diagnostic DTC:P2102, P2103

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

DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using an electric motor and 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.

Tech Tips

This electronic throttle control system does not use a throttle cable.

DTC No. DTC Detection Condition Trouble Area
P2102

Conditions (a) and (b) continue for 2 seconds (1 trip detection logic):

(a) Throttle actuator duty ratio is 80% or more

(b) Throttle actuator current is 0.5 A or less

  • Open in throttle actuator circuit

  • Throttle with motor body assembly (throttle actuator)

  • ECM
P2103

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


  • Hybrid IC diagnosis signal indicates a failure

  • Throttle actuator current is 7 A or more for 0.6 seconds

  • Short in throttle actuator circuit

  • Throttle with motor body assembly (throttle actuator)

  • Throttle valve

  • ECM

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.

CONFIRMATION DRIVING PATTERN

A005KGQE63

  1. Connect the intelligent tester to the DLC3.

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

  3. Clear the 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 intelligent 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 the pending DTCs.

    Tech Tips


    • 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.

    Intelligent 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
    UNKNOWN

    • Unable to perform DTC judgment

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

    Tech Tips


    • 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 UNKNOWN, perform steps [B] through [C] again and, if necessary, drive the vehicle for a period of time.

FAIL-SAFE

When either of these DTCs, or other DTCs relating to electronic throttle control system malfunctions, are set, the ECM enters fail safe mode. During fail safe mode, the ECM cuts the current to the throttle actuator off, 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 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.

WIRING DIAGRAM

A005HSFE02

CAUTION / NOTICE / HINT

Tech Tips


  • 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.

PROCEDURE


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


    1. A005I7GE01
      Text in Illustration
      *a

      Component without harness connected

      (Throttle with Motor Body Assembly)

      Disconnect the throttle with motor body assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 Ω

    3. Reconnect the throttle with motor body assembly connector.

      Tech Tips

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


    NG

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    OK

  2. 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 (Check for Open)
      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
      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
      Standard Resistance (Check for Short)
      for RHD
      Tester Connection Condition Specified Condition
      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
      for LHD
      Tester Connection Condition Specified Condition
      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

    4. Reconnect the throttle with motor body assembly connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE WITH MOTOR BODY ASSEMBLY - ECM)

    OK

  3. 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.

      Tech Tips

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


    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY

    OK

  4. 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.

      Tech Tips

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


    OK

    REPLACE ECM Click here

    NG

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here