DTC U0074:00

CAN communication: Module communication error (local CAN between TCM and PCM)

DETECTION CONDITION

• Vehicle condition: TCM communication normal

• Status: Detects CAN BUS OFF malfunction

• Period: After CAN controller reset, confirmed by re-detection

FAIL-SAFE FUNCTION

• Inhibits learning control.

• Inhibits direct mode.

• Inhibits AAS mode.

• Inhibits the TCC control and slip control.

• Inhibits 5GR and 6GR.

• Inhibits the neutral control.

• Inhibits the slope control.

POSSIBLE CAUSE

• CAN bus communication line malfunction

• PCM malfunction

• TCM malfunction

STEP

INSPECTION

ACTION

1

NOTE:

• Recording can be facilitated using the screen capture of the PC function.

• Record the freeze frame data/snap shot data.

—

Go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• Switch the ignition off, then ON (engine off).

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Is any other DTC stored?

Yes

Follow the applicable DTC inspection procedure, then go to the next step.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

Go to the next step.

4

• Perform the PCM DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

DTC U0074:00 or U0302:00 is displayed:

• CAN communication line can be considered the cause.

• Repair or replace the wiring harness between PCM and TCM, then go to the next step.

DTC other than U0074:00 and U0302:00 is displayed:

• Go to the applicable DTC inspection.

  (See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

PCM can be considered the cause.

• Replace the PCM, then go to the next step.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

5

• Always reconnect all disconnected connectors.

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the following procedure to ensure that the DTC has been resolved:

• Start the engine.

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Is the same DTC present?

Yes

Replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)

No

Go to the next step.

6

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

DTC troubleshooting completed.