ECD SYSTEM, Diagnostic DTC:P1220

DTC Code DTC Name
P1220 Timer Control Circuit

DESCRIPTION

The ECM controls the injection timing by actuating the timing control valve. The timing control valve is mounted on the injection or supply pump assembly and controls the internal fuel pressure of the pump through duty control.

The ECM detects the injection advance angle based on the TDC and NE signals.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1220 Timer Control Circuit During and after engine warm up, actual injection timing is different from target value of ECM calculated for several second.

  • Open or short in timing control valve circuit

  • Timing control valve

  • Fuel filter element sub-assembly (Clogging)

  • Fuel (Freezing, air present)

  • Injection or supply pump assembly (Internal pressure andtiming control valve)

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

A01SC8XE02

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 TIMING CONTROL VALVE ASSEMBLY


    1. Inspect the timing control valve.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY (TIMING CONTROL VALVE) Click here

    OK

  2. INSPECT TIMING CONTROL VALVE ASSEMBLY (POWER SOURCE)


    1. A01SE09C02
      *a

      Front view of wire harness connector

      (to Timing Control Valve)

      Disconnect the timing control valve connector.

    2. Turn the ignition switch to ON.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      C133-1 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TIMING CONTROL VALVE - INSTRUMENT PANEL JUNCTION BLOCK)

    OK

  3. CHECK HARNESS AND CONNECTOR (TIMING CONTROL VALVE - ECM)


    1. Disconnect the timing control valve 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
      C133-2 - C127-11 (TCV) Always Below 1 Ω
      C133-2 or C127-11 (TCV) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    END

    OK

  4. CHECK FUEL FILTER ASSEMBLY


    1. Check the fuel filter element sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL FILTER ASSEMBLY Click here

    OK

  5. CHECK FUEL LEAK


    1. Visually check the injection or supply pump assembly, each injector and fuel line for fuel leaks.

      Click here

      OK
      No leakage
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR FUEL LEAK

    OK

  6. REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY


    1. Replace the injection or supply pump assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK DTC OUTPUT (DTC P1220 IS OUTPUT AGAIN)


    1. Connect the GTS to the DLC3.

    2. Clear the DTC.


      Powertrain > Engine > Clear DTCs

    3. Start the engine.

    4. Idle the engine for 20 sec. or more.

    5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    6. Read the DTC.

      Result
      Display (DTC output) Proceed to
      DTC P1220 is output again A
      No DTC output B

    A

    REPLACE ECM Click here

    B

    END