DCA

C1A08 PRESSURE SENSOR





Description
- The brake pressure sensor detects the brake fluid pressure value in the brake master cylinder and outputs the value to the brake booster control unit.
- The brake booster control unit receives the brake fluid pressure command signal from the ICC sensor integrated unit via ITS communication and controls the brake fluid pressure while feeding back the brake fluid pressure value (brake fluid pressure control signal).




DTC Logic

DTC DETECTION LOGIC

DTC DETECTION LOGIC:

NOTE:
If DTC "C1A08" is detected along with DTC "U1000", first diagnose the DTC "U1000". Refer to DCA DCA DCA 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 that the "C1A08" is detected as the current malfunction in self-diagnosis results of "ICC".
Is "C1A08" 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 "C1A08" 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 HARNESS BETWEEN BRAKE BOOSTER CONTROL UNIT AND BRAKE PRESSURE SENSOR
1. Turn the ignition switch OFF.
2. Disconnect connectors of brake booster control unit and brake pressure sensor.
3. Check for continuity between the brake booster control unit harness connector and brake pressure sensor harness connector.





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





Is the inspection result normal?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK BRAKE PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Connect connectors of brake booster control unit and brake pressure sensor.
2. Turn the ignition switch ON.
3. Check voltage between brake booster control unit harness connectors.





Is the inspection result normal?
YES - Replace the brake pressure sensor.
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 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