C1A05

C1A05 BRAKE SW/STOP LAMP SW





Description
- ICC brake switch is turned OFF and stop lamp switch is turned ON when depressing the brake pedal.
- ICC brake switch signal is input to ECM. The signal is transmitted from ECM to ICC sensor integrated unit via CAN communication.
- Stop lamp switch signal is input to ECM and ABS actuator and electric unit (control unit). These signals are transmitted from ECM and ABS actuator and electric unit (control unit) to ICC sensor integrated unit via CAN communication.




DTC Logic

DTC DETECTION LOGIC






NOTE:
If DTC "C1A05" is detected along with DTC "U1000", "U0401", "U0415", or "U0121", first diagnose the DTC
"U1000", "U0401", "U0415", or "U0121".
- DTC "U1000": Cruise Control.
- DTC "U0401": U0401.
- DTC "U0415": VDC CAN 1.
- DTC "U0121": U0121.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform "All DTC Reading" with CONSULT-III.
2. Check if "U1000", "U0401", "U0415", or "U0121" is detected other than "C1A05" in "Self Diagnostic Result" of "ICC/ADAS".
Is any DTC detected?
YES - Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Testing and Inspection.
NO - GO TO 2.
2.CHECK ICC BRAKE SWITCH WITH ICC DATA MONITOR
Check that "BRAKE SW" operate normally in "DATA MONITOR" of "ICC/ADAS".
Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 4.
3.CHECK STOP LAMP SWITCH WITH ABS DATA MONITOR
Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ABS".
Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 9.
4.CHECK ICC BRAKE SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check ICC brake switch for correct installation. Inspection and Adjustment.
Is the inspection result normal?
YES - GO TO 5.
NO - Adjust ICC brake switch installation. Inspection and Adjustment.
5.CHECK ICC BRAKE SWITCH
1. Disconnect ICC brake switch connector.
2. Check ICC brake switch. SEE Component Inspection (ICC Brake Switch).
Is the inspection result normal?
YES - GO TO 6.
NO - Replace ICC brake switch.
6.CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between ICC brake switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace ICC brake switch power supply circuit.
7.CHECK HARNESS BETWEEN ICC BRAKE SWITCH AND ECM
1. Turn ignition switch OFF.
2. Disconnect ECM connector.
3. Check for continuity between ICC brake switch harness connector and ECM harness connector.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair the harness or connectors.
8.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform "All DTC Reading".
4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Testing and Inspection.
Is any DTC detected?
YES - Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO - Replace ICC sensor integrated unit. Exploded View.
9.CHECK STOP LAMP SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check stop lamp switch for correct installation. Inspection and Adjustment.
Is the inspection result normal?
YES - GO TO 10.
NO - Adjust stop lamp switch installation. Inspection and Adjustment.
10.CHECK STOP LAMP SWITCH
1. Disconnect stop lamp switch connector.
2. Check stop lamp switch. SEE Component Inspection (Stop Lamp Switch).
Is the inspection result normal?
YES - GO TO 11.
NO - Replace stop lamp switch.
11.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between stop lamp switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 12.
NO - Repair or replace stop lamp switch power supply circuit.
12.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check continuity between stop lamp switch harness connector and ABS actuator and electric unit (control unit) harness connector.





Is the inspection result normal?
YES - GO TO 14.
NO - Repair the harness or connectors.
13.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform "All DTC Reading".
4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Testing and Inspection.
Is any DTC detected?
YES - Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO - GO TO 14.
14.PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform "All DTC Reading".
4. Check if any DTC is detected in "Self Diagnostic Result" of "ABS". Testing and Inspection.
Is any DTC detected?
YES - Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO - Replace ICC sensor integrated unit. Exploded View.




Component Inspection (ICC Brake Switch)
1.CHECK ICC BRAKE SWITCH
Check for continuity between ICC brake switch terminals.





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




Component Inspection (Stop Lamp Switch)
1.CHECK STOP LAMP SWITCH
Check for continuity between stop lamp switch terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace stop lamp switch.




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