DTC U0320:00 [SKYACTIV-D 1.5]

id0102q2901300

DTC U0320:00

EPS control module 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 EPS control module
―  Counter error in signal from EPS control module
Diagnostic support note
•  This is an intermittent monitor (other).
•  The check engine light does not illuminate.
•  FREEZE FRAME DATA is not available.
•  Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Not applicable
POSSIBLE CAUSE
•  CAN drive error (instrument cluster or PCM)
•  CAN communication line malfunction between EPS control module and PCM
―  EPS control module terminal 2B—Front body control module (FBCM) terminal 2P
―  EPS control module terminal 2D—Front body control module (FBCM) terminal 2N
―  Front body control module (FBCM) terminal 2K—PCM terminal 2C
―  Front body control module (FBCM) terminal 2I—PCM terminal 2D
•  Front body control module (FBCM) malfunction
•  EPS control module connector or terminals malfunction
•  PCM connector or terminals malfunction
•  EPS control module malfunction
•  PCM 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 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 DTC FOR MODULE COMMUNICATION
•  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
CONFIRM FRONT BODY CONTROL MODULE (FBCM) DTC
•  Perform the front body control module (FBCM) DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
No
Go to the next step.
5
CONFIRM EPS CONTROL MODULE DTC
•  Perform the EPS control module DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
No
Go to the next step.
6
CONFIRM INSTRUMENT CLUSTER DTC
•  Perform the instrument cluster DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER].)
No
Go to the next step.
7
INSPECT EPS CONTROL MODULE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the EPS control module 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 9.
No
Go to the next step.
8
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.
No
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:
―  EPS control module terminal 2B—Front body control module (FBCM) terminal 2P
―  EPS control module terminal 2D—Front body control module (FBCM) terminal 2N
―  Front body control module (FBCM) terminal 2K—PCM terminal 2C
―  Front body control module (FBCM) terminal 2I—PCM terminal 2D
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.
If the malfunction recurs, replace the EPS control module.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
Go to the next step.
9
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 PCM.
Go to the next step.
No
Go to the next step.
10
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.