ICC (Full Speed Range)

C1A31 BCU INTERNAL MALF





Description
The brake booster control unit inputs the brake fluid pressure control signal and release switch signal and transmits them to ICC sensor integrated unit via ITS communication. Also, it receives the brake fluid pressure command signal from ICC sensor integrated unit via ITS communication and activates the booster solenoid to operate the brake booster (brake).




DTC Logic

DTC DETECTION LOGIC

DTC DETECTION LOGIC:

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the MAIN switch of ICC system ON.
3. Perform "All DTC Reading" with CONSULT-III.
4. Check if the "C1A31" is detected as the current malfunction in "Self Diagnostic Result" of "ICC".
Is "C1A31" detected as the current malfunction?
YES - Refer to ICC (Full Speed Range).
NO - Refer to Intermittent Incident.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULTS
Check if any DTC other than "C1A31" is detected in "Self Diagnostic Result" of "ICC".
Is any DTC detected?
YES - Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to Testing and Inspection.
NO - Replace the brake booster control unit.




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 ICC SYSTEM
1. Erase the "Self Diagnostic Result", and then perform "All DTC Reading" again after performing the action test. (Refer to ICC (Full Speed Range) for action test.)
2. Check that the ICC system is normal.
- WORK END