DCA

C1A28 BCU POWER SUPPLY CIRCUIT, C1A29 BCU POWER SUPPLY CIRCUIT2





Description
The brake booster control unit controls the brake booster, etc. with the battery power supply and ignition power supply.




DTC Logic

DTC DETECTION LOGIC

DTC Detection Logic:

NOTE:
If DTC "C1A28" or "C1A29" is detected along with DTC "U1000", first diagnose the DTC "U1000". Refer to DCA.

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the DCA switch ON.
3. Perform "All DTC Reading" with CONSULT-III.
4. Check if the "C1A28" or "C1A29" is detected as the current malfunction in self-diagnosis results.
Is "C1A28" or "C1A29" detected as the current malfunction?
YES - Refer to DCA.
NO - Refer to Intermittent Incident.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULTS
Check if "U1000" is detected other than "C1A28", "C1A29" in "Self Diagnostic Result" of "ICC".
Is "U1000" detected?
YES - Perform the CAN communication system inspection. Repair or replace the malfunctioning parts. Refer to DCA.
NO - GO TO 2.
2.CHECK BRAKE BOOSTER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check brake booster control unit power supply and ground circuit. Refer to DCA DCA
Is the inspection result normal?
YES - Replace the brake booster control unit.
NO - Repair brake booster control unit power supply and ground circuit.




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. Refer to ICC (Full Speed Range) ICC (Full Speed Range) 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. (Refer to DCA for action test.)
2. Check that the DCA system is normal.
- WORK END