ECD SYSTEM(for Swirl Control Valve), Diagnostic DTC:P066B,P066D,P066F,P0671,P0672,P0673,P0674 and P067B

DTC Code DTC Name
P066B Cylinder 1 Glow Plug Control Circuit High
P066D Cylinder 2 Glow Plug Control Circuit High
P066F Cylinder 3 Glow Plug Control Circuit High
P0671 Cylinder 1 Glow Plug Circuit/Open
P0672 Cylinder 2 Glow Plug Circuit/Open
P0673 Cylinder 3 Glow Plug Circuit/Open
P0674 Cylinder 4 Glow Plug Circuit/Open
P067B Cylinder 4 Glow Plug Control Circuit High

DESCRIPTION

Refer to DTC P052F (Click here).

DTC No.

DTC Detection Condition

Trouble Area

P066B

When system determines short in No. 1 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 1 glow plug

  • Short in No. 1 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P066D

When system determines short in No. 2 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 2 glow plug

  • Short in No. 2 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P066F

When system determines short in No. 3 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 3 glow plug

  • Short in No. 3 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P067B

When system determines short in No. 4 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 4 glow plug

  • Short in No. 4 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P0671

When system determines open in No. 1 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 1 glow plug

  • Open in No. 1 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P0672

When system determines open in No. 2 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 2 glow plug

  • Open in No. 2 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P0673

When system determines open in No. 3 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 3 glow plug

  • Open in No. 3 glow plug circuit

DTC No.

DTC Detection Condition

Trouble Area

P0674

When system determines open in No. 4 glow plug system from glow plug controller assembly via LIN communication for 1.2 seconds or more

(3 trip detection logic)

  • Glow plug controller assembly

  • No. 4 glow plug

  • Open in No. 4 glow plug circuit

WIRING DIAGRAM

Refer to DTC P052F (Click here).

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs Registration and Initialization (Click here).

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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. CHECK DTC OUTPUT

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Engine and ECT / Trouble Codes.

    4. Read the DTCs.

      Table 1. Result

      Result

      Proceed to

      P0671, P0672, P0673 and/or P0674 is output

      A

      P066B, P066D, P066F and/or P067B is output

      B

    CHECK HARNESS AND CONNECTORClick here

  2. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER ASSEMBLY - GLOW PLUG)

    1. Disconnect connectors of the glow plug controller assembly.

    2. Remove the glow plug connector from the glow plug.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      X1-4 (GL1) - X3-1

      Always

      Below 1 Ω

      X1-1 (GL2) - X4-1

      Always

      Below 1 Ω

      X1-6 (GL3) - X5-1

      Always

      Below 1 Ω

      X1-5 (GL4) - X6-1

      Always

      Below 1 Ω

    REPLACE GLOW PLUGClick here

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  3. CHECK HARNESS AND CONNECTOR

    1. Disconnect connectors of the glow plug controller assembly.

    2. Remove the glow plug connector from the glow plug.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      X1-4 (GL1) or X3-1 - Body ground

      Always

      10 kΩ or higher

      X1-1 (GL2) or X4-1 - Body ground

      Always

      10 kΩ or higher

      X1-6 (GL3) or X5-1 - Body ground

      Always

      10 kΩ or higher

      X1-5 (GL4) or X6-1 - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  4. REPLACE GLOW PLUG

    1. Replace the glow plug (Click here).

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs (Click here).

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.

    END

  6. REPLACE GLOW PLUG CONTROLLER ASSEMBLY

    1. Replace the glow plug controller assembly (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs (Click here).

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.

    END