DTC U0315:00 [MZR 1.6]

id0102h3901200

DTC U0315:00

ABS HU/CM or DSC HU/CM error
DETECTION CONDITION
•  When any of the following conditions is met:
―  CAN communication line malfunction between DSC HU/CM and PCM (with DSC)
―  CAN communication line malfunction between ABS HU/CM and PCM (without DSC)
―  DSC HU/CM internal malfunction (with DSC)
―  ABS HU/CM internal malfunction (without DSC)
Diagnostic support note
•  This is a continuous monitor (other).
•  The check engine light does not illuminate.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
Not applicable
POSSIBLE CAUSE
With DSC
•  CAN drive error (DSC HU/CM or PCM)
•  CAN communication line malfunction between DSC HU/CM and PCM
―  DSC HU/CM terminal AF—Front body control module (FBCM) terminal 2R
―  DSC HU/CM terminal AC—Front body control module (FBCM) terminal 2L
―  Front body control module (FBCM) terminal 2P—PCM terminal 1BE
―  Front body control module (FBCM) terminal 2N—PCM terminal 1AZ
•  DSC HU/CM connector or terminals malfunction
•  PCM connector or terminals malfunction
•  DSC HU/CM malfunction
•  PCM malfunction
Without DSC
•  CAN drive error (ABS HU/CM or PCM)
•  CAN communication line malfunction between ABS HU/CM and PCM
―  ABS HU/CM terminal H—Front body control module (FBCM) terminal 2R
―  ABS HU/CM terminal L—Front body control module (FBCM) terminal 2L
―  Front body control module (FBCM) terminal 2P—PCM terminal 1BE
―  Front body control module (FBCM) terminal 2N—PCM terminal 1AZ
•  ABS HU/CM connector or terminals malfunction
•  PCM connector or terminals malfunction
•  ABS HU/CM 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.
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.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [MZR 1.6].)
No
Go to the next step.
3
VERIFY ABS HU/CM OR DSC HU/CM DTC
•  Perform the ABS HU/CM or DSC HU/CM DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [ANTILOCK BRAKE SYSTEM (ABS)].)
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No
Go to the next step.
4
INSPECT ABS HU/CM OR DSC HU/CM CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the ABS HU/CM or DSC HU/CM 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.
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.
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.
•  Perform the KOEO or KOER self test.
•  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.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.6].)
No
DTC troubleshooting completed.