ECD SYSTEM, Diagnostic DTC:P1222

DTC Code DTC Name
P1222 Throttle Motor Circuit Range/Performance

DESCRIPTION

Throttle control motor is operated by the ECM and opens and closes the throttle valve.

The fully open position of the throttle valve is detected by the throttle open switch which is mounted on the venturi assembly.

If this DTC is stored, the ECM shuts down the power for the throttle control motor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1222 Throttle Motor Circuit Range/Performance

    Either condition is met (1 trip detection logic):

  • Open or short in throttle control motor circuit.

  • Open or short in throttle open switch circuit.

  • Open or short in throttle control motor circuit

  • Throttle control motor (Venturi assembly)

  • Intake restrictor valve

  • Open or short in throttle open switch circuit

  • Throttle open switch (Venturi assembly)

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

B003KS5E01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition 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, and other data from the time the malfunction occurred.

PROCEDURE


  1. INSPECT THROTTLE OPEN SWITCH


    1. B003KNOC01
      *a

      Component without harness connected

      (Throttle Open Switch)

      Disconnect the throttle open switch connector.

    2. Remove the venturi assembly.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always Below 1 Ω
      1 - 2 Always 10 kΩ or higher

      Tech Tips

      The throttle open switch is integrated with the venturi assembly. If the throttle open switch is replaced, the venturi assembly must be replaced in whole.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VENTURI ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (THROTTLE OPEN SWITCH - BODY GROUND, ECM - THROTTLE OPEN SWITCH)


    1. Disconnect the throttle open switch connector.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C185-2 - C175-15 (THOP) Always Below 1 Ω
      C185-1 - Body ground Always Below 1 Ω
      C185-2 or C175-15 (THOP) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK TERMINAL VOLTAGE (THROTTLE CONTROL MOTOR)


    1. B003PXWC73
      *a

      Front view of wire harness connector

      (to Throttle Control Motor)

      Disconnect the throttle control motor connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      C184-2 (+B1) - Body ground Always 11 to 14 V
      C184-5 (+B2) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE CONTROL MOTOR - INSTRUMENT PANEL JUNCTION BLOCK)

    OK

  4. INSPECT THROTTLE CONTROL MOTOR


    1. Inspect the throttle control motor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VENTURI ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM)


    1. Disconnect the throttle control motor connector.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C184-6 (LU+A) - C174-17 (LU+A) Always Below 1 Ω
      C184-4 (LU-A) - C174-16 (LU-A) Always Below 1 Ω
      C184-3 (LU+B) - C174-15 (LU+B) Always Below 1 Ω
      C184-1 (LU-B) - C174-14 (LU-B) Always Below 1 Ω
      C184-6 (LU+A) or C174-17 (LU+A) - Body ground and other terminals Always 10 kΩ or higher
      C184-4 (LU-A) or C174-16 (LU-A) - Body ground and other terminals Always 10 kΩ or higher
      C184-3 (LU+B) or C174-15 (LU+B) - Body ground and other terminals Always 10 kΩ or higher
      C184-1 (LU-B) or C174-14 (LU-B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR