ECD SYSTEM, Diagnostic DTC:P066B, P066D, P066F, P0671, P0672, P0673, P0674, 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

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P066B Cylinder 1 Glow Plug Control Circuit High

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

 Does not come on DTC stored
P066D Cylinder 2 Glow Plug Control Circuit High

When system determines short in No. 2 glow 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

 Does not come on DTC stored
P066F Cylinder 3 Glow Plug Control Circuit High

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

 Does not come on DTC stored
P0671 Cylinder 1 Glow Plug Circuit/Open

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

 Does not come on DTC stored
P0672 Cylinder 2 Glow Plug Circuit/Open

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

 Does not come on DTC stored
P0673 Cylinder 3 Glow Plug Circuit/Open

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

 Does not come on DTC stored
P0674 Cylinder 4 Glow Plug Circuit/Open

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

 Does not come on DTC stored
P067B Cylinder 4 Glow Plug Control Circuit High

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

 Does not come on DTC stored

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.

Tech Tips


  • 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.


      Powertrain > Engine and ECT > Trouble Codes

    4. Read the DTCs.

      Result
      Result Proceed to
      P0671, P0672, P0673 and/or P0674 is output A
      P066B, P066D, P066F and/or P067B is output B

    B

    CHECK HARNESS AND CONNECTOR Click here

    A

  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
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 4 Click here

    NG

    GO TO STEP 7 Click 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 Below 1 Ω
      X1-1 (GL2) or X4-1 - Body ground Always Below 1 Ω
      X1-6 (GL3) or X5-1 - Body ground Always Below 1 Ω
      X1-5 (GL4) or X6-1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. REPLACE GLOW PLUG


    1. Replace the glow plug.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  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.


      Powertrain > Engine and ECT > Clear DTCs

    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.


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  6. REPLACE GLOW PLUG CONTROLLER ASSEMBLY


    1. Replace the glow plug controller assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 8 Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  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.


      Powertrain > Engine and ECT > Clear DTCs

    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.


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END