DCA
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". Cruise Control.
Diagnosis Procedure
1. CHECK SELF-DIAGNOSIS RESULTS
1.Perform "All DTC Reading" with CONSULT.
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.
DCA.
NO- GO TO 2.
2. CHECK BRAKE SWITCH
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
Check that "STOP LAMP SW" operate normally in "DATA MONITOR" of "ABS".
Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 9.
4. CHECK BRAKE SWITCH INSTALLATION
1.Turn ignition switch OFF.
2.Check brake switch for correct installation. Adjustments.
Is the inspection result normal?
YES- GO TO 5.
NO- Adjust brake switch installation. Adjustments.
5. BRAKE SWITCH INSPECTION
1.Disconnect brake switch connector.
2.Check brake switch. .
Is the inspection result normal?
YES- GO TO 6.
NO- Replace brake switch.
6. CHECK BRAKE SWITCH POWER SUPPLY CIRCUIT
1.Turn the ignition switch ON.
2.Check voltage between 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 BRAKE SWITCH AND HPCM
1.Turn ignition switch OFF
2.Disconnect HPCM connector.
3.Check for continuity between brake switch harness connector and HPCM harness connector.
4.Check for continuity between 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 HPCM
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 "EV/HEV". 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.
9. CHECK STOP LAMP SWITCH INSTALLATION
1.Turn ignition switch OFF.
2.Check stop lamp switch for correct installation. Adjustments.
Is the inspection result normal?
YES- GO TO 10.
NO- Adjust stop lamp switch installation. Adjustments.
10. STOP LAMP SWITCH INSPECTION
1.Disconnect stop lamp switch connector.
2.Check 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 ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1.Turn the ignition switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) connector and resistor.
3.Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit (control unit) 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. 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 (Brake Switch)
1. CHECK BRAKE SWITCH
Check for continuity between brake switch terminals.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace 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.