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 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 2.0 seconds (1 trip detection logic):

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

(b) Throttle actuator current is less than 0.5 A

  • Open in throttle actuator circuit

  • Throttle actuator

  • ECM
P2103

Either condition is met (1 trip detection logic):


  • There is a hybrid IC diagnosis signal failure.

  • There is a hybrid IC current limiter port failure.

  • Short in throttle actuator circuit

  • Throttle actuator

  • Throttle valve

  • Throttle with motor body assembly

  • ECM

FAIL-SAFE

When either of these DTCs, or other DTCs relating to electronic throttle control system 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 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 position 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.

The ECM continues operating in fail-safe mode until a pass condition is detected, and the ignition switch is then turned off.

WIRING DIAGRAM

A017FY5E15

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


    1. Inspect 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)
      Tester Connection Condition Specified Condition
      B27-2 (M+) - B47-20 (M+) Always Below 1 Ω
      B27-1 (M-) - B48-29 (M-) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      B27-2 (M+) or B47-20 (M+) - Body ground Always 10 kΩ or higher
      B27-1 (M-) or B48-29 (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

    OK

  3. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY


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

      OK
      No foreign objects between throttle valve and housing.

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY

    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 WITH MOTOR BODY ASSEMBLY Click here

    OK

    REPLACE ECM Click here