Driver Assistance System

U0129 BCU CAN 2





Description
The brake booster control unit transmits the signal related to brake control to ICC sensor integrated unit via
ITS communication.




DTC Logic

DTC DETECTION LOGIC






NOTE:
If DTC "U0129" is detected along with DTC "U1000", first diagnose the DTC "U1000". DCA.

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the DCA system ON.
3. Perform "All DTC Reading" with CONSULT-III.
4. Check if the "U0129" is detected as the current malfunction in self-diagnosis results of "ICC/ADAS".
Is "U0129" detected as the current malfunction?
YES - SEE Diagnosis Procedure.
NO - Intermittent Incident.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULTS
Check if "U1000" is detected other than "U0129" in "Self Diagnostic Result" of "ICC/ADAS".
Is "U1000" detected?
YES - Perform the CAN communication system inspection. Repair or replace the malfunctioning parts. DCA.
NO - GO TO 2.
2.REPLACE BRAKE BOOSTER CONTROL UNIT
1. Turn ignition switch OFF.
2. Replace brake booster control unit.
3. Erases All self-diagnosis results.
4. Perform DTC confirmation procedure. SEE DTC Logic.
5. Perform "All DTC Reading".
6. Check if the "U0129" is detected in "Self Diagnostic Result" of "ICC/ADAS".
Is "U0129" detected?
YES - Replace the ICC sensor integrated unit. DCA.
NO - INSPECTION END




Special Repair Requirement

DESCRIPTION
Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following operation is performed.
- Removal and installation of ICC sensor integrated unit
- Replacement of ICC sensor integrated unit

SPECIAL REPAIR REQUIREMENT
1.LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT
Adjust the laser beam aiming of the ICC sensor integrated unit. Description Special Repair Requirement Description, "LASER BEAM AIMING
ADJUSTMENT : Description".
- GO TO 2.
2.CHECK DCA SYSTEM
1. Erase the "self-diagnosis results", and then perform "All DTC Reading" again after performing the action test. ( Description(Distance Control Assist) for action test.)
2. Check that the DCA system is normal.
- WORK END