СИСТЕМА ECD, Diagnostic DTC:P0200/97

DTC Code DTC Name
P0200/97 Injector Circuit / Open

DESCRIPTION

The EDU has been adopted to drive the injectors at high speeds. The EDU delivers high-speed driving under highly-pressurized fuel conditions using the DC/DC converter, which provides a high-voltage and quick- charging system.

Soon after the EDU receives an injection command (IJT) signal from the ECM, the EDU responds to the command with an injector injection confirmation (IJF) signal when the current is applied to the injector.

A01BHIPE01
DTC No. DTC Detection Condition Trouble Area
P0200/97

Open or short in EDU or injector circuit

After engine is started, there is no IJF signal from EDU to ECM, despite ECM sending IJT signal to EDU

(1 trip detection logic)

  • Open or short in EDU circuit

  • Injector

  • EDU

  • ECM

Tech Tips

DTC P0200/97 is detected when start the engine and let it idle for 30 seconds.

MONITOR DESCRIPTION

P0200/97 (Open or short in EDU or injector circuit):

The ECM continuously monitors both injection command (IJT) signals and injection confirmation (IJF) signal. This DTC will be set if the ECM judges that the number of IJT signals and IJF signals are inconsistent.

The injectors are grounded over a Field Effect Transistor (FET) and a serial resistor. This resistor creates a voltage drop, which is monitored by the EDU (injector drive circuit), in relation to the current drawn by the injector. When the injector current becomes too high, the voltage drop over the resistor exceeds a specified level and no IJF signal for that cylinder is sent to the ECM.

P0200/97 refers to a malfunction in the EDU or injector circuit.

If this DTC is set, the ECM enters fail-safe mode and limits engine power. The fail-safe mode continues until the ignition switch is turned OFF.

A01BCP0E01

MONITOR STRATEGY

Required sensors IJF signal from EDU
Frequency of operation Continuous
Duration 10 seconds
MIL operation 1 driving cycle

TYPICAL ENABLING CONDITIONS

Item Specification Specification
Minimum Maximum
Engine speed 500 rpm -
Battery voltage 11 V -
Engine switch ON ON

TYPICAL MALFUNCTION THRESHOLDS

Threshold

The injection missing counter* for all the cylinders, or for one individual cylinder, reaches a specified number (taking approximately 1 second after starting the engine)

*: Increments when no IJF signal is received from the EDU despite the ECM sending IJT signals

WIRING DIAGRAM

A01BCU5E01
A01BAUEE01

INSPECTION PROCEDURE

Note


  • After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

  • After replacing the injector, the ECM needs registration Click here.

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. INSPECT INJECTOR ASSEMBLY


    1. A01BBJME01

      Disconnect the D24, D25, D26 and D27 injector connectors.

    2. Measure the resistance of the injector.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.85 to 1.05 Ω

    NG

    REPLACE INJECTOR ASSEMBLY

    OK

  2. CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - EDU)


    1. A01BAOFE01

      Check the wire harness between the injector and EDU (INJ terminal).


      1. Disconnect the D24, D25, D26 and D27 connectors.

      2. Disconnect the B13 EDU connector.

      3. Measure the resistance of the wire harness side connectors.

        Standard resistance
        Tester Connection Specified Condition
        D24-2 - B13-4 (INJ1) Below 1 Ω
        D25-2 - B13-2 (INJ2) Below 1 Ω
        D26-2 - B13-1 (INJ3) Below 1 Ω
        D27-2 - B13-3 (INJ4) Below 1 Ω
        D24-1 - B13-5 (COM1) Below 1 Ω
        D25-1 - B13-6 (COM2) Below 1 Ω
        D26-1 - B13-6 (COM2) Below 1 Ω
        D27-1 - B13-5 (COM1) Below 1 Ω
        D24-2 or B13-4 (INJ1) - Body ground 10 kΩ or higher
        D25-2 or B13-2 (INJ2) - Body ground 10 kΩ or higher
        D26-2 or B13-1 (INJ3) - Body ground 10 kΩ or higher
        D27-2 or B13-3 (INJ4) - Body ground 10 kΩ or higher
        D24-1 or B13-5 (COM1) - Body ground 10 kΩ or higher
        D25-1 or B13-6 (COM2) - Body ground 10 kΩ or higher
        D26-1 or B13-6 (COM2) - Body ground 10 kΩ or higher
        D27-1 or B13-5 (COM1) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (EDU - ECM)


    1. A01BI47E01

      Disconnect the B15 EDU connector.

    2. Disconnect the D1 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      B15-6 (#1) - D1-24 (#1) Below 1 Ω
      B15-3 (#2) - D1-23 (#2) Below 1 Ω
      B15-2 (#3) - D1-22 (#3) Below 1 Ω
      B15-5 (#4) - D1-21 (#4) Below 1 Ω
      B15-7 (INJF) - D1-25 (INJF) Below 1 Ω
      B15-6 (#1) or D1-24 (#1) - Body ground 10 kΩ or higher
      B15-3 (#2) or D1-23 (#2) - Body ground 10 kΩ or higher
      B15-2 (#3) or D1-22 (#3) - Body ground 10 kΩ or higher
      B15-5 (#4) or D1-21 (#4) - Body ground 10 kΩ or higher
      B15-7 (INJF) or D1-25 (INJF) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK INJECTOR DRIVER


    1. A01BB1AE01

      Disconnect the B13 and B15 EDU connectors.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the wire harness side connectors.

      Standard voltage
      Tester Connection Specified Condition
      B13-8 (+B) - B15-1 (GND) 9 to 14 V

    NG

    CHECK EDU POWER SOURCE CIRCUIT

    OK

  5. CHECK ECM (INJECTOR VOLTAGE)


    1. A01BDWTE01

      While idling the engine, check the waveform of the ECM connectors using an oscilloscope.

      Standard
      Tester Connection Specified Condition
      D1-24 (#1) - D3-7 (E1) Correct waveform is shown
      D1-23 (#2) - D3-7 (E1) Correct waveform is shown
      D1-22 (#3) - D3-7 (E1) Correct waveform is shown
      D1-21 (#4) - D3-7 (E1) Correct waveform is shown
      D1-25 (INJF) - D3-7 (E1) Correct waveform is shown
      Tool Setting/(a) 5 V/DIV., 20 msec./DIV.
      Tool Setting/(b) 2 V/DIV., 20 msec./DIV.
      Condition Idling with warm engine

      Tech Tips

      The waveform varies depending on the injector injection.


    NG

    REPLACE ECM

    OK

    REPLACE INJECTOR DRIVER