SFI SYSTEM, Diagnostic DTC:P2118

DTC Code DTC Name
P2118 Throttle Actuator Control Motor Current Range / Performance

DESCRIPTION

The electronic throttle control system has a dedicated power supply circuit. The voltage (+BM) is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the electronic throttle control system and cuts off the current to the throttle actuator.

When the voltage becomes unstable, the electronic throttle control system itself becomes unstable. For this reason, when the voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to normal, turn the engine switch off. On the next restart, the ECM will allow the current to flow to the throttle actuator.

Tech Tips

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

A01CDQCE24
DTC No. DTC Detection Condition Trouble Area
P2118

Open in electronic throttle control system power source (+BM) circuit

(1 trip detection logic)

  • Open in electronic throttle control system power source circuit

  • Battery

  • Battery terminals


  • ETC-S fuse


  • ECM

FAIL-SAFE

When this DTC, 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 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 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 engine switch is then turned off.

WIRING DIAGRAM

A01CCHIE01

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.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (+BM VOLTAGE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the tester on.

    3. Enter the following menus: Powertrain / Engine / Data List / +BM voltage.

    4. Read the value displayed on the tester.

      Standard Voltage
      11 to 14 V

    NG

    INSPECT FUSE (ETC-S FUSE) Click here

    OK

  2. INSPECT BATTERY


    1. Check that the battery is not discharged.

      OK
      Battery is not discharged.

    NG

    REPLACE BATTERY

    OK

  3. CHECK BATTERY TERMINAL


    1. Check that the battery terminals and ECM ground are not loose or corroded.

      OK
      Battery terminals and ECM ground are not loose or corroded.

    NG

    REPAIR OR REPLACE BATTERY TERMINAL

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  4. INSPECT FUSE (ETC-S FUSE)


    1. A01CFJ8E01

      Remove the ETC-S fuse from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ETC-S fuse Always Below 1 Ω

    3. Reinstall the ETC-S fuse.


    NG

    REPLACE FUSE (ETC-S FUSE)

    OK

  5. CHECK HARNESS AND CONNECTOR (BATTERY - ECM)


    1. A01CBGLE03

      Disconnect the ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A8-3 (+BM) - Body ground Always 11 to 14 V

    3. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM)

    OK

    REPLACE ECM Click here