Wipers/Washers System Description - Failsafe Function

Hardware Failsafe 

The control module of the CPU for the windshield wiper control unit/motor in case of an abnormality is as shown in the table.

Output Name	Fixed Value
Motor Drive Circuit	All OFF
LIN Communication Circuit	OFF

Body Control Module Frame Error 

In case of a bus off error or wiper/washer switch signal error, the failsafe operation is as follows:

NOTE:  If the back up line switches from OFF to ON, failsafe operation starts with Step 1.

	Back Up Line	Failsafe Operation When Wiper is Active		Failsafe operation When Wiper is Not Active
1	OFF	Parking operation (Except for wiping in AUTO mode)		No operation (Remains stopped)
2	ON	Step 1	HIGH operation for 3 minutes -> Step 2
		Step 2	LOW operation for 3 minutes -> Step 3
		Step 3	Intermittent operation (speed-dependent variable mode) for 12 minutes -> Step 4
		Step 4	Parking operation

Body Control Module Frame Error in Auto Mode Operation 

If a wiper switch signal error occurs while the wipers are operating in auto mode, the failsafe operation is as follows:

	Previous Operation in AUTO Mode	Failsafe Operation
1	HIGH	Step 1	HIGH operation for 3 minutes -> Step 2
2	LOW	Step 2	LOW operation for 3 minutes -> Step 3
3	INT, Lower reversal position, or Parking position	Step 3	Intermittent operation (speed-dependent variable mode) for 12 minutes -> Step 4
		Step 4	Parking operation

BACK UP LINE and LIN Inconsistency Error 

If an error occurs due to inconsistency between the back up line and LIN (IG1 signal and wiper switch signal), the failsafe operation is as follows:

Back Up Line	IG1	Wiper Switch Position	Failsafe Operation
ON	ON	LOW and HIGH Switch OFF	HIGH
	OFF	--	Step 1	HIGH for 3 minutes -> Step 2
			Step 2	LOW for 3 minutes -> Step 3
			Step 3	Intermittent operation (speed-dependent variable mode) for 12 minutes -> Step 4
			Step 4	Parking operation

Automatic Wiper Frame Error 

If the automatic lighting/rain sensor is faulty or an abnormal automatic wiper signal is detected, the failsafe operation is as follows:

	Previous Operation in AUTO Mode	Failsafe Operation
1	HIGH	Step 1	HIGH for 3 minutes -> Step 2
2	LOW	Step 2	LOW for 3 minutes -> Step 3
3	INT	Step 3	Intermittent operation (speed-dependent variable mode)
4	Lower reversal position or Parking position

Thermal Protection Function 

The intelligent controlled wiper system performs thermal protection control to prevent excess heat generation by the windshield wiper control unit/motor due to abnormal load. If the temperature of the windshield wiper control unit/motor exceeds the protective action temperature, the wiping speed is reduced, and is restored once the temperature falls below the reset action temperature.