ECD SYSTEM (w/ EGR Cooler Bypass Valve), Diagnostic DTC:P245C, P245D

DTC Code DTC Name
P245C EGR Cooler Bypass Control Circuit Low
P245D EGR Cooler Bypass Control Circuit High

DESCRIPTION

The EGR cooler VSV is controlled by the ECM, and the opening and closing of the EGR cooler bypass valve is performed according to the vacuum applied by the vacuum pump assembly.

DTC No. DTC Detection Condition Trouble Area
P245C

Open in the EGR cooler VSV circuit for 3 seconds

(1 trip detection logic)

  • EGR cooler VSV

  • Open in EGR cooler VSV circuit

  • EFI3 fuse

  • ECM
P245D

Short in the EGR cooler VSV circuit for 3 seconds

(1 trip detection logic)

  • EGR cooler VSV

  • Short in EGR cooler VSV circuit

  • ECM

WIRING DIAGRAM

A01KEI8E01

INSPECTION PROCEDURE

Note

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

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. 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 EGR COOLER VSV (RESISTANCE)


    1. A01KGSAE04
      Text in Illustration
      *1 EGR Cooler VSV
      *a Component Side

      Disconnect the V3 EGR cooler VSV connector.

    2. Measure the resistance of the EGR cooler VSV.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 33 to 39 Ω

    NG

    REPLACE EGR COOLER VSV Click here

    OK

  2. INSPECT EGR COOLER VSV (POWER SOURCE VOLTAGE)


    1. A01KFMTE44
      Text in Illustration
      *1 EGR Cooler VSV Connector
      *a Wire Harness Side

      Disconnect the V3 EGR cooler VSV connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage of the wire harness side connector and body ground.

      Standard voltage
      Tester Connection Specified Condition
      V3-1 - Body ground 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - EGR COOLER VSV) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (EGR COOLER VSV - ECM)


    1. Disconnect the V3 EGR cooler VSV connector.

    2. Disconnect the E10 ECM connector.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      V3-2 - E10-4 (ECBV) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      V3-2 or E10-4 (ECBV) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  4. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - EGR COOLER VSV)


    1. Inspect the EFI3 fuse.


      1. Remove the EFI3 fuse from the R/B No. 2.

      2. Check the EFI3 fuse resistance.

        Standard resistance
        Below 1 Ω

      3. Reinstall the EFI3 fuse.

    2. Check the wire harness between the EGR cooler VSV and EFI MAIN relay.


      1. Disconnect the V3 EGR cooler VSV connector.

      2. Remove the EFI MAIN relay from the R/B No. 2.

      3. Check the resistance.

        Standard resistance (Check for open)
        Tester Connection Specified Condition
        R/B No. 2 (EFI MAIN relay terminal 3) - V3-1 Below 1 Ω
        Standard resistance (Check for short)
        Tester Connection Specified Condition
        R/B No. 2 (EFI MAIN relay terminal 3) or V3-1 - Body ground 10 kΩ or higher

      4. Reconnect the EGR cooler VSV connector.

      5. Reinstall the EFI MAIN relay.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    INSPECT ECM POWER SOURCE CIRCUIT Click here