DTC U0338:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9901600

DTC U0338:00

Start stop unit error

DETECTION CONDITION

•  When any of the following conditions is met:

―  CAN communication line malfunction between start stop unit and PCM

―  Start stop unit internal malfunction

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2) is not available.

•  Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

•  CAN drive error (start stop unit or PCM)

•  CAN communication line malfunction between start stop unit and PCM

―  Start stop unit terminal 2M—Front body control module (FBCM) terminal 2K

―  Start stop unit terminal 2O—Front body control module (FBCM) terminal 2I

―  Front body control module (FBCM) terminal 2P—PCM terminal 2AK

―  Front body control module (FBCM) terminal 2N—PCM terminal 2AL

•  Start stop unit connector or terminals malfunction

•  PCM connector or terminals malfunction

•  Start stop unit malfunction

•  PCM malfunction

DTC U0338:00	Start stop unit error
DETECTION CONDITION	• When any of the following conditions is met: ― CAN communication line malfunction between start stop unit and PCM ― Start stop unit internal malfunction Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2) is not available. • Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• CAN drive error (start stop unit or PCM) • CAN communication line malfunction between start stop unit and PCM ― Start stop unit terminal 2M—Front body control module (FBCM) terminal 2K ― Start stop unit terminal 2O—Front body control module (FBCM) terminal 2I ― Front body control module (FBCM) terminal 2P—PCM terminal 2AK ― Front body control module (FBCM) terminal 2N—PCM terminal 2AL • Start stop unit connector or terminals malfunction • PCM connector or terminals malfunction • Start stop unit malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	VERIFY DTC FOR MODULE COMMUNICATION • Switch the ignition off, then ON (engine off). • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, 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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
2		No	Go to the next step.
3	VERIFY START STOP UNIT DTC • Perform the start stop unit DTC inspection using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [START STOP UNIT].)
3		No	Go to the next step.
4	INSPECT START STOP UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the start stop unit 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 6.
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 the next step.
5		No	Go to the next step.
6	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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, 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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
7		No	DTC troubleshooting completed.