Distance Control Assist System

C1A09 BOOSTER SOLENOID

Description

- The booster solenoid is integrated with the brake booster.
- The brake booster control unit activates the booster solenoid to operate the brake booster (brake) according to the brake fluid pressure command signal received from ICC sensor integrated unit via ITS communication.


DTC Logic


DTC DETECTION LOGIC






NOTE:
If DTC "C1A09" is detected along with DTC "U1000", first diagnose the DTC "U1000". Distance Control Assist System.

DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

1.Start the engine.
2.Perform the active test item "BOOSTER SOL/V" with CONSULT.
3.Perform "All DTC Reading".
4.Check if the "C1A09" is detected as the current malfunction in self-diagnosis results of "ICC/ADAS".
Is "C1A09" detected as the current malfunction?
YES- .
NO- Intermittent Incident.


Diagnosis Procedure


1. CHECK SELF-DIAGNOSIS RESULTS

Check if "U1000" is detected other than "C1A09" in "Self Diagnostic Result" of "ICC/ADAS".
Is "U1000" detected?
YES- Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
Distance Control Assist System.
NO- GO TO 2.

2. CHECK BRAKE BOOSTER CONTROL UNIT POWER SUPPLY CIRCUIT

Check power supply and ground circuit of brake booster control unit. Distance Control Assist System.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace the malfunctioning parts.

3. CHECK HARNESS BETWEEN BRAKE BOOSTER (BOOSTER SOLENOID) AND BRAKE BOOSTER

CONTROL UNIT
1.Turn the ignition switch OFF.
2.Disconnect connectors of brake booster control unit and brake booster.
3.Check for continuity between the brake booster control unit harness connector and brake booster harness connector.





4.Check for continuity between brake booster control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair the harnesses or connectors.

4. CHECK BOOSTER SOLENOID

Check the booster solenoid. .
Is the inspection result normal?
YES- Replace the brake booster control unit.
NO- Replace the brake booster.


Component Inspection


1. CHECK BRAKE BOOSTER (BOOSTER SOLENOID)






Check resistance between brake booster (booster solenoid) terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace the brake booster.


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.
- 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