Diagnosis Procedure

LDW SWITCH CIRCUIT


Diagnosis Procedure

1.CHECK LDW SWITCH SIGNAL INPUT
1. Turn the ignition switch ON.
2. With operating the LDW 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 LDW SWITCH
1. Turn ignition switch OFF.
2. Remove LDW switch.
3. Check LDW switch. Refer to Component Inspection.
Is the LDW switch normal?
YES - GO TO 3.
NO - Replace LDW switch.
3.CHECK LDW SWITCH GROUND CIRCUIT
Check continuity between LDW switch harness connector and the ground.





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





Does continuity exist?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK LDW 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.