BSW & BSI

C1A05 BRAKE SW/STOP LAMP SW





DTC Logic

DTC DETECTION LOGIC






NOTE:
If DTC "C1A05" is detected along with DTC "U1000", first diagnose the DTC "U1000". BSW & BSI.




Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform "All DTC Reading" with CONSULT-III.
2. Check if the "U1000" is detected other than "C1A05" in "Self Diagnostic Result" of "ICC/ADAS".
Is "U1000" detected?
YES - Perform the CAN communication system inspection. Repair or replace the malfunctioning parts. BSW & BSI.
NO - GO TO 2.
2.CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
Check that "STOP LAMP SW" and "BRAKE SW" operate normally in "DATA MONITOR" of "ICC/ADAS".
Is the inspection result normal?
YES - GO TO 3.
NO-1 - When "BRAKE SW" operation is malfunctioning: GO TO 4.
NO-2 - When "STOP LAMP SW" operation is malfunctioning: GO TO 9.
3.CHECK STOP LAMP SWITCH
Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ABS".
Is the inspection result normal?
YES - GO TO 14.
NO - GO TO 9.
4.CHECK ICC BRAKE SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check ICC brake switch for correct installation. Inspection.
Is the inspection result normal?
YES - GO TO 5.
NO - Adjust ICC brake switch installation. Inspection.
5.ICC BRAKE SWITCH INSPECTION
1. Disconnect ICC brake switch connector.
2. Check ICC brake switch. Brake Switch/Stop Lamp 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 the 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 the harnesses or connectors.
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.





4. Check for continuity between ICC brake switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 8.
NO - Repair the harnesses 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(VQ37VHR) or Testing and Inspection (VK56VD).
Is any DTC detected?
YES - Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO - Replace the ADAS control unit. Service and Repair.
9.CHECK STOP LAMP SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check stop lamp switch for correct installation. Inspection.
Is the inspection result normal?
YES - GO TO 10.
NO - Adjust stop lamp switch installation. Inspection.
10.STOP LAMP SWITCH INSPECTION
1. Disconnect stop lamp switch connector.
2. Check stop lamp switch. Brake Switch/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 the 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 the harnesses or connectors.
12.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM
1. Turn ignition switch OFF
2. Disconnect ECM, rear combination lamp and high-mounted stop lamp connectors.
3. Check for continuity between stop lamp switch harness connector and ECM harness connector.





4. Check for continuity between stop lamp switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 13.
NO - Repair the harnesses or connectors.
13.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit
(control unit) harness connector.





3. Check for continuity between stop lamp switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 14.
NO - Repair the harnesses or connectors.
14.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(VQ37VHR) or Testing and Inspection (VK56VD).
Is any DTC detected?
YES - Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO - GO TO 15.
15.PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
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 the ADAS control unit. Service and Repair.




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.