ECD SYSTEM, Diagnostic DTC:P0200

DTC Code DTC Name
P0200 Injector Circuit / Open

DESCRIPTION

The EDU has been adopted to drive the injector at high speeds. The EDU has realized high-speed driving under high fuel pressure conditions through the use of a voltage converter that provides a high-voltage, quick-charging system.

The ECM constantly monitors the EDU and stops the engine if an abnormal condition is detected.

DTC No. DTC Detection Condition Trouble Area
P0200 Open or short in EDU or injector circuit. After engine is started, there is no injection confirmation signal (IJF) from EDU to ECM despite ECM sending injection command signal (IJT) to EDU

  • Open or short in EDU circuit

  • Injector

  • EDU

  • ECM

WIRING DIAGRAM

A01CHH0E01
A01CICVE04

INSPECTION PROCEDURE

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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. CHECK EDU (+B VOLTAGE)


    1. A01CH1QE01

      Disconnect the EDU connectors.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      E26-8 (+B) - E27-1 (GND) Ignition switch in the ON position 18 to 27 V

    4. Reconnect the EDU connectors.


    NG

    CHECK EDU POWER SOURCE CIRCUIT

    OK

  2. CHECK EDU (INJECTOR RESISTANCE)


    1. A01CJG0E01

      Disconnect the EDU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E26-4 (INJ#1) - E26-5 (COM1) 20°C (68°F) 0.35 to 0.55 Ω
      E26-2 (INJ#2) - E26-6 (COM2) 20°C (68°F) 0.35 to 0.55 Ω
      E26-1 (INJ#3) - E26-6 (COM2) 20°C (68°F) 0.35 to 0.55 Ω
      E26-3 (INJ#4) - E26-5 (COM1) 20°C (68°F) 0.35 to 0.55 Ω

    3. Reconnect the EDU connector.


    OK

    CHECK HARNESS AND CONNECTOR (EDU - ECM) Click here

    NG

  3. INSPECT INJECTOR ASSEMBLY


    1. A01CHWBE17

      Disconnect the injector connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.35 to 0.55 Ω

    3. Reconnect the injector connectors.


    NG

    REPLACE INJECTOR ASSEMBLY

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - INJECTOR ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (EDU - ECM)


    1. A01CILAE01

      Disconnect the EDU 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
      E27-6 (IJT#1) - E22-24 (#1) Always Below 1 Ω
      E27-3 (IJT#2) - E22-23 (#2) Always Below 1 Ω
      E27-2 (IJT#3) - E22-22 (#3) Always Below 1 Ω
      E27-5 (IJT#4) - E22-21 (#4) Always Below 1 Ω
      E27-7 (IJF) - E22-25 (INJF) Always Below 1 Ω
      Check for short
      Tester Connection Condition Specified Condition
      E27-6 (IJT#1) or E22-24 (#1) - Body ground Always 10 kΩ or higher
      E27-3 (IJT#2) or E22-23 (#2) - Body ground Always 10 kΩ or higher
      E27-2 (IJT#3) or E22-22 (#3) - Body ground Always 10 kΩ or higher
      E27-5 (IJT#4) or E22-21 (#4) - Body ground Always 10 kΩ or higher
      E27-7 (IJF) or E22-25 (INJF) - Body ground Always 10 kΩ or higher

    4. Reconnect the EDU connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - ECM)

    OK

  5. CHECK ECM (OUTPUT VOLTAGE)


    1. A01CJ17E06

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

      Standard
      Tester Connection Specified Condition
      E22-24 (#1) - E23-7 (E1) Correct waveform appears as shown
      E22-23 (#2) - E23-7 (E1) Correct waveform appears as shown
      E22-22 (#3) - E23-7 (E1) Correct waveform appears as shown
      E22-21 (#4) - E23-7 (E1) Correct waveform appears as shown
      E22-25 (INJF) - E23-7 (E1) Correct waveform appears as shown
      Result
      Result Proceed to
      #1 to #4 is normal, INJF is abnormal A
      #1 to #4 is abnormal, INJF is normal B

    B

    REPLACE ECM

    A

    REPLACE EDU