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DTC U2300:55 [ELECTRONICALLY CONTROLLED BRAKE UNIT]

DTC U2300:55 [ELECTRONICALLY CONTROLLED BRAKE UNIT]

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Outline

System malfunction location

Configuration data
Detection condition
•  The electronically controlled brake unit detects any of the following conditions.
―  Configuration procedure not completed
―  Signal in which configuration was not implemented is received from body control module (BCM) and PCM
Fail-safe
Refer to “DTC Table” and “Fail-safe Function Malfunction Contents Table”. (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)
Possible cause
Note
•  To correctly write the configuration data sent from the body control module (BCM) and PCM to electronically controlled brake unit, 30 s or more have to be elapsed since the ignition is switched ON (engine off or on).
•  DTCs are stored in the body control module (BCM).
―  Body control module (BCM) configuration not implemented
―  Body control module (BCM) internal memory malfunction
•  Configuration procedure was not completed properly.
•  PCM malfunction
•  Body control module (BCM) malfunction
•  Electronically controlled brake unit malfunction
System wiring diagram
Not applicable
Connector diagram
Not applicable


Diagnostic Procedure

Step

Inspection

Results

Action
1
INSPECT PCM FOR MALFUNCTION
•  Perform the DTC inspection for PCM.
•  Are any DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G (E))].)
(See DTC TABLE [PCM (SKYACTIV-X)].)
No
Go to the next step.
2
INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION
•  Perform the DTC inspection for body control module (BCM).
•  Are any DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
No
Go to the next step.
3
VERIFY REPLACEMENT RECORD OF ELECTRONICALLY CONTROLLED BRAKE UNIT
•  Before performing the troubleshooting diagnostic procedure this time, verify if the electronically controlled brake unit was replaced.
•  Was the electronically controlled brake unit replaced?
Yes
After reimplementing the required servicing when replacing the electronically controlled brake unit in accordance with electronically controlled brake unit removal/installation, perform the repair completion verification.
(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)
(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
4
RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM)
•  Perform the body control module (BCM) configuration using the M-MDS.
•  Clear the DTC recorded in the memory.
•  Switch the ignition ON (engine off or on) and wait for 30 s or more.
•  Perform the DTC inspection for the electronically controlled brake unit.
•  Is the same Pending DTC present?
Yes
Perform the body control module (BCM) configuration again using the M-MDS and perform the repair completion verification.
No
Go to repair completion verification 2.
Repair completion verification 1
VERIFY THAT VEHICLE IS REPAIRED
•  Clear the DTC recorded in the memory.
•  Switch the ignition ON (engine off or on) and wait for 30 s or more.
•  Perform the DTC inspection for the electronically controlled brake unit.
•  Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the electronically controlled brake unit, then go to the next step.
No
Go to the next step.
Repair completion verification 2
VERIFY IF OTHER DTC IS DISPLAYED
•  Perform the DTC inspection.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.