СИСТЕМА ECD, 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. DTC Detection Condition Trouble Area
P1222 Open or short in throttle control motor 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
Open or short in throttle open switch circuit.

WIRING DIAGRAM

A01XJYSE07

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. A01XDKXE01
      Text in Illustration
      *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 Throttle valve is opened Below 1 Ω
      1 - 2 Throttle valve is closed 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.


    NG

    REPLACE VENTURI ASSEMBLY

    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
      C163-2 - C162-15 (THOP) Always Below 1 Ω
      C163-1 - Body ground Always Below 1 Ω
      C163-2 or C162-15 (THOP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK TERMINAL VOLTAGE (THROTTLE CONTROL MOTOR)


    1. A01XJSSE01
      Text in Illustration
      *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 Switch Condition Specified Condition
      C105-2 (+B1) - Body ground Ignition switch ON 11 to 14 V
      C105-5 (+B2) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE CONTROL MOTOR - NO. 1 INTEGRATION RELAY)

    OK

  4. INSPECT THROTTLE CONTROL MOTOR


    1. A01XK07E05
      Text in Illustration
      *a

      Component without harness connected

      (Throttle Control Motor)

      Disconnect the throttle control motor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (LU-B) - 2 (+B1) 20°C (68°F) 18 to 22 Ω
      2 (+B1) - 3 (LU+B) 20°C (68°F) 18 to 22 Ω
      4 (LU-A) - 5 (+B2) 20°C (68°F) 18 to 22 Ω
      5 (+B2) - 6 (LU+A) 20°C (68°F) 18 to 22 Ω

      Tech Tips

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


    NG

    REPLACE VENTURI ASSEMBLY

    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
      C105-6 (LU+A) - C161-17 (LU+A) Always Below 1 Ω
      C105-4 (LU-A) - C161-16 (LU-A) Always Below 1 Ω
      C105-3 (LU+B) - C161-15 (LU+B) Always Below 1 Ω
      C105-1 (LU-B) - C161-14 (LU-B) Always Below 1 Ω
      C105-6 (LU+A) or C161-17 (LU+A) - Body ground Always 10 kΩ or higher
      C105-4 (LU-A) or C161-16 (LU-A) - Body ground Always 10 kΩ or higher
      C105-3 (LU+B) or C161-15 (LU+B) - Body ground Always 10 kΩ or higher
      C105-1 (LU-B) or C161-14 (LU-B) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR