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 gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle 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 is 80% or more

(b) Throttle actuator current is 0.5 A or less

  • Open in throttle actuator circuit


  • Throttle actuator


  • ECM
P2103

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


  • Throttle actuator current is 10 A or more for 0.1 seconds

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

  • Short in throttle actuator circuit


  • Throttle actuator


  • Throttle valve


  • Throttle body assembly


  • ECM

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, 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 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

A0056FOE17
*a Throttle Actuator Control Circuit
*b Throttle Actuator
*c Shielded

CAUTION / NOTICE / HINT

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 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 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 ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)


    1. A0058SEE04
      Text in Illustration
      *1

      Component without harness connected

      (Throttle Body)

      Disconnect the throttle 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 body assembly connector.


    NG

    REPLACE THROTTLE BODY ASSEMBLY Click here

    OK

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


    1. Disconnect the throttle 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
      B7-2 (M+) - B39-43 (M+) Always Below 1 Ω
      B7-1 (M-) - B39-42 (M-) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      B7-2 (M+) or B39-43 (M+) - Body ground Always 10 kΩ or higher
      B7-1 (M-) or B39-42 (M-) - Body ground Always 10 kΩ or higher

    4. Reconnect the throttle body assembly connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE ACTUATOR - ECM)

    OK

  3. INSPECT THROTTLE BODY (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.

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

    OK

  4. INSPECT THROTTLE BODY (THROTTLE VALVE)


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

      OK
      Throttle valve opens and closes smoothly.

    OK

    REPLACE ECM Click here

    NG

    REPLACE THROTTLE BODY ASSEMBLY Click here