LDW

WARNING SYSTEMS SWITCH CIRCUIT

Component Function Check


1. CHECK WARNING SYSTEMS SWITCH INPUT SIGNAL

1.Turn the ignition switch ON.
2.Select the DATA MONITOR item "ITS SW 1" of "AVM" with CONSULT.
3.With operating the warning systems switch, check the monitor status.





Is the inspection result normal?
YES- Warning systems switch circuit is normal.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" ITS.

1. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT

1.Turn the ignition switch ON.
2.Check voltage between ITS control unit harness connector and ground.





Is the inspection result normal?
YES- Replace the ITS control unit. Refer to "Removal and Installation ITS Control Unit" Removal And Installation - ITS Control 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. Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 3.
NO- Replace the warning systems switch. Refer to "Removal and Installation" LDW.

3. CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT

Check continuity between warning system switch harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR OPEN

1.Disconnect the ITS control unit connector.
2.Check continuity between the ITS control unit harness connector and warning system switch harness connector.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair the harnesses or connectors.

5. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR SHORT

Check continuity between the ITS control unit harness connector and ground.





Is the inspection result normal?
YES- Replace the ITS control unit. Refer to "Removal and Installation ITS Control Unit" Removal And Installation - ITS Control Unit.
NO- Repair the harnesses or connectors.


Component Inspection


1. CHECK WARNING SYSTEMS SWITCH

Check continuity of warning systems switch.





Is the inspection result normal?
YES- Inspection End.
NO- Replace the warning systems switch. Refer to "Removal and Installation" LDW.