СИСТЕМА ECD, Diagnostic DTC:P1225

DTC Code DTC Name
P1225 Spill Control Circuit

DESCRIPTION

The ECM controls the fuel injection volume by operating the spill control valve. The spill control valve is mounted on the injection or supply pump assembly, and opens or closes the injection pressure releasing port with the solenoid valve in the spill control valve. During injection, the valve is closed (ON). The ECM decides the basic fuel injection volume by the engine speed and accelerator pedal opening angle, and calculates the final fuel injection angle to make the various corrections to the basic fuel injection volume. The ECM counts the NE signal to detect the angle from injection starts and operates the spill control valve from ON to OFF (the injection pressure releasing port is open) at the position that detects the final fuel injection angle.

A01SBJYE01
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1225 Spill Control Circuit Open or short in spill control valve at 500 rpm or more.

  • Open or short in spill control valve circuit

  • Spill control valve (Injection or supply pump assembly)

  • ECM

 Comes on DTC stored

WIRING DIAGRAM

A01SD48E02
*a Spill Control Valve

CAUTION / NOTICE / HINT

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 SPILL CONTROL VALVE


    1. Inspect the spill control valve.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INJECTION PUMP ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ECM - SPILL CONTROL VALVE)


    1. Disconnect the spill control valve connector.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      C132-2 - C127-2 (SPV+) Always Below 1 Ω
      C132-1 - C127-1 (SPV-) Always Below 1 Ω
      C132-2 or C127-2 (SPV+) - Body ground and other terminals Always 10 kΩ or higher
      C132-1 or C127-1 (SPV-) - 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