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 the gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body. 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 2.0 seconds (1 trip detection logic):

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

(b) Throttle actuator current is 0.5 A or less

  • Open in throttle actuator circuit

  • Throttle actuator

  • ECM
P2103 Throttle actuator current is 7 A or more for 0.6 seconds (1 trip detection logic)

  • Short in throttle actuator circuit

  • Throttle actuator

  • Throttle valve

  • Throttle body

  • ECM

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions, is 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 6° 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 opening 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

A017FY5E09

INSPECTION PROCEDURE

Tech Tips


  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  • The throttle actuator current (Throttle Motor Close Duty ) and the throttle actuator duty ratio Throttle Motor Open Duty / Throttle Motor Close Duty) 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 BODY (RESISTANCE OF THROTTLE CONTROL MOTOR)


    1. A017DI6E06

      Disconnect the throttle with motor body connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      B27-2 (M+) - B27-1 (M-) 20°C (68°F) 0.3 to 100 Ω

    3. Reconnect the throttle with motor body connector.


    NG

    REPLACE THROTTLE BODY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (THROTTLE BODY - ECM)


    1. A017FN9E02

      Disconnect the throttle body connector.

    2. Disconnect the ECM connector.

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

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      B27-2 (M+) - B1-5 (M+) Always Below 1 Ω
      B27-1 (M-) - B1-4 (M-) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      B27-2 (M+) or B1-5 (M+) - Body ground Always 10 kΩ or higher
      B27-1 (M-) or B1-4 (M-) - Body ground Always 10 kΩ or higher

    4. Reconnect the throttle body connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT THROTTLE BODY


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

      OK
      Normal

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

    OK

  4. INSPECT THROTTLE VALVE


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

      OK
      The throttle valve opens and closes smoothly.

    NG

    REPLACE THROTTLE BODY Click here

    OK

    REPLACE ECM Click here