Warning Systems Switch Circuit

WARNING SYSTEMS SWITCH CIRCUIT





Component Function Check
1.CHECK WARNING SYSTEMS SWITCH SIGNAL BY CONSULT-III
CONSULT-III DATA MONITOR
1. Turn the ignition switch ON.
2. Select "LDW SW" of "LANE CAMERA" data monitor item.
3. With operating the warning systems switch, check the monitor status.





Is the item status normal?
YES - Warning systems switch circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT
1. Turn the ignition switch ON.
2. With operating the warning systems switch, check the voltage between the lane camera unit harness connector and the ground.





Is the measurement value normal?
YES - Replace the lane camera unit.
NO - GO TO 2.
2.CHECK WARNING SYSTEMS SWITCH
1. Turn ignition switch OFF.
2. Remove warning systems switch.
3. Check warning systems switch. SEE Component Inspection.
Is the warning systems switch normal?
YES - GO TO 3.
NO - Replace warning systems switch.
3.CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT
Check continuity between warning systems switch harness connector terminal and the ground.





Does continuity exist?
YES - GO TO 4.
NO - Repair harness or connector.
4.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
1. Disconnect the lane camera unit connector.
2. Check continuity between the lane camera unit harness connector and warning systems switch harness connector.





Does continuity exist?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR SHORT
Check continuity between the lane camera unit harness connector and ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace the lane camera unit.




Component Inspection
1.CHECK WARNING SYSTEMS SWITCH
Check continuity of warning systems switch.





Is the check result normal?
YES - Warning systems switch is normal.
NO - Replace warning systems switch.