СИСТЕМА ECD, Diagnostic DTC:18 (5)

DTC Code DTC Name
18 (5) Spill Control Circuit Malfunction

DESCRIPTION

The ECM operates the spill control valve to control the fuel injection volume. The spill control valve is mounted on the injection pump. The spill control valve's solenoid valve opens and closes the injection pressure release port. During fuel injection, the spill control valve is on (closed). The ECM determines the basic fuel injection amount based on the engine speed and accelerator pedal position. Then the ECM uses several other correctional factors to determine the final fuel injection amount. After fuel injection has begun, the ECM ensures the final fuel injection amount by performing the following: 1) by counting the number of NE signals, and 2) by turning the spill control valve from on (closed) to off (open) (injection pressure release port is open).

A01DOR5E04
DTC No. DTC Detection Condition Trouble Area
18 (5) Open or short in the spill control valve circuit at 500 rpm or more.

  • Open or short in spill control valve circuit

  • Spill control valve

  • ECM

WIRING DIAGRAM

A01DOZEE02

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT SPILL CONTROL VALVE


    1. Inspect the spill control valve Click here.


    NG

    REPLACE INJECTION PUMP ASSEMBLY Click here

    OK

  2. CHECK ECM (SPV+ VOLTAGE)


    1. A01DUBVE88
      Text in Illustration
      *a

      Component with harness connected

      (ECM)

      Disconnect the spill 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
      C101-12 (SPV+) - C101-14 (E1) Ignition switch ON 11 to 14 V

    4. Reconnect the spill control valve connector.


    NG

    REPLACE ECM Click here

    OK

  3. CHECK ECM (SPV- VOLTAGE)


    1. A01DUFCE06
      Text in Illustration
      *a

      Component with harness connected

      (ECM)
      *b SPV- signal waveform

      Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C101-25 (SPV-) - C101-14 (E1) Ignition switch ON 11 to 14 V

    3. While idling, check the waveform with an oscilloscope connected between the specified terminals of the ECM connector.

      OK
      Tester Connection Condition Specified Condition
      C101-25 (SPV-) - C101-14 (E1) Idling Correct waveform is as shown

    NG

    CHECK HARNESS AND CONNECTOR (ECM - SPILL CONTROL VALVE) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

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


    1. Disconnect the spill control valve connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      C106-2 - C101-12 (SPV+) Always Below 1 Ω
      C106-1 - C101-25 (SPV-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C106-2 or C101-12 (SPV+) - Body ground Always 10 kΩ or higher
      C106-1 or C101-25 (SPV-) - Body ground Always 10 kΩ or higher

    4. Reconnect the spill control valve connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here