DTC U0302:00 [SKYACTIV-D 1.5]

id0102q2901000

DTC U0302:00

TCM processor error
DETECTION CONDITION
•  With the battery voltage 10 V or more, any of the following conditions is continuously met for 3.5 s.
―  Check sum error in signal from TCM
―  Counter error in signal from TCM
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Inhibits engine-stop by operating the i-stop function.
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 1G
―  TCM terminal H—PCM terminal 1C
•  TCM DTC is stored.
•  CAN drive error (TCM or PCM)
•  PCM malfunction
•  TCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data on the repair order.
—
Go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
Go to the next step.
4
INSPECT TCM CONNECTOR CONDITION
•  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
INSPECT PCM CONNECTOR CONDITION
•  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
CONFIRM TCM DTC
•  Perform the TCM DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
DTC U0074:00 or U0115:00 is displayed:
•  CAN communication line can be considered the cause.
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  TCM terminal G—PCM terminal 1G
•  TCM terminal H—PCM terminal 1C
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a malfunction.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness.
•  Go to the next step.
DTC other than U0074:00 and U0115:00 is displayed:
•  Go to the applicable DTC inspection.
No
PCM can be considered the cause.
•  Replace the PCM, then go to the next step.
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the control valve body.
Go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
DTC troubleshooting completed.