DTC U0302:00

TCM processor error

DETECTION CONDITION

• When any of the following conditions is met:

• CAN communication line malfunction between TCM and PCM

• TCM internal malfunction

Diagnostic support note

• This is a continuous monitor (other).

• The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

• TCM connector or terminals malfunction

• PCM connector or terminals malfunction

• CAN communication line malfunction between PCM and TCM (local CAN between PCM and TCM)

• TCM terminal G—PCM terminal 1A

• TCM terminal H—PCM terminal 1B

• TCM DTC is stored.

• CAN drive error (TCM or PCM)

• PCM malfunction

• TCM malfunction

STEP

INSPECTION

ACTION

1

• Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (other related) been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then 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 Pending Trouble Code Access Procedure and DTC Reading Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any other PENDING CODEs and/or DTCs present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

4

• Switch the ignition off.

• Disconnect the TCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 7.

No

Go to the next step.

5

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 7.

No

Go to the next step.

6

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

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL].)

• Are any DTCs present?

Yes

DTC U0074:00 or U0115:00 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 U0115:00 is displayed:

• Go to the applicable DTC inspection.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FW6A-EL].)

No

TCM can be considered the cause.

• Replace the control valve body, then go to the next step.

  (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)

7

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Perform the KOEO or KOER self test.

  (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

Go to the next step.

No

Go to the next step.

8

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

DTC troubleshooting completed.