DTC U0302:00 [SKYACTIV-D 2.2]

id0102s4901000

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 (Mode 2)/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  The fast idle up correction for the idle speed control is inhibited.

•  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 1AD

―  TCM terminal H—PCM terminal 1Y

•  TCM DTC is stored.

•  CAN drive error (TCM or PCM)

•  PCM malfunction

•  TCM malfunction

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 (Mode 2)/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• The fast idle up correction for the idle speed control is inhibited. • 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 1AD ― TCM terminal H—PCM terminal 1Y • TCM DTC is stored. • CAN drive error (TCM or PCM) • PCM malfunction • TCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then 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.
2		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. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Are any other PENDING CODEs and/or DTCs present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
3		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.
4		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.
5		No	Go to the next step.
6	CONFIRM TCM DTC • Perform the TCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [GW6A-EL].) • 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 1AD • TCM terminal H—PCM terminal 1Y 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. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [GW6A-EL].)
6		No	PCM can be considered the cause. • Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [GW6A-EL].) Go to the next step.
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
8		No	DTC troubleshooting completed.