Hyundai Elantra AD: Windshield Wiper/Washer

Sixth generation (AD; 2017–2020) / Hyundai Elantra AD 2017-2020 Service Manual / Body Electrical System / Windshield Wiper/Washer

Components and Components Location

Component Location

1. Windshield wiper arm & blade
2. Wiper & washer switch
3. Windshield washer hose & nolzzle
4. Washer motor & linkage assembly

5. Washer motor
6. Washer reservoir
7. Wiper/Washer relay (Built - in PCB block)
8. Washer fluid level sensor

Windshield Wiper-Washer Switch Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	If it is necessary to remove multifunction switch assembly, remove the steering wheel. (Steering System - "Steering Wheel")

3.	Remove the steering column upper shrouds (A). (Refer to Body - "Steering Column Shroud Panel")

4.	Remove the clock spring. (Refer to Restraint - "Driver Airbag (DAB) Module and Clock Spring")

5.	Disconnect the multifunction switch connector (A).

6.	Loosen the screws (2EA) from the multifunction switch assembly (A).

Installation

1.	Install the multifunction switch.

2.	Install the clock spring and steering wheel.

3.	Install the steering column upper and lower shrouds.

4.	Install the steering wheel.

Inspection (with GDS)

When each switch is pressed, check the electricity flow between multi-function switch connector and grounding, and if the electricity does not match the specification, replace the switch.

Deiscripsion	Switch	No.	Resistance value (?, ±1%)
Wiper switch signal	MIST	1 - 9	330
	OFF		?
	INT (AUTO)		800
	Low		1800
	High		5700
Front wiper INT volume	Volume 1	7 - 9	330
	Volume 2		690
	Volume 3		1310
	Volume 4		2610
	Volume 5		7310
Fog lamp switch	OFF	9 - 10	?
Fog lamp switch	ON	9 - 10	910
Turn signal lamp switch	OFF	9 - 12	?
	Left		910
	Right		2910
Head lamp Passing / High beam switch	OFF	9 - 13	?
	Passing		910
	Dimmer		2910
Light Switch	OFF	9 - 14	?
	Auto		680
	Tail lamp		1680
	Head lamp (Low)		5580

The body electrocal system can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).

The diagnostic system (GDS) provides the following information.

(1)	Self diagnosis : Checking the failure code (DTC) and display

(2)	Current data : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	Additional function : Other controlling such as he system option and zero point adjustment

3.	Select the "Car Model" and the system to be checked in order to check the vehicle with the tester.

4.	Select the "Body Control Module (BCM)" to check the Body Control Module (BCM).

5.	Select the "Current Data" menu to search the current state of the input/output data. The input/output data for the sensors corresponding to the Body Control Module (BCM) can be checked.

Front Wiper Motor Components and Components Location

Component Location

1. Cap
2. Nut
3. Wiper arm & blade
4. Rivet

5. Cowl top cover
6. Bolt
7. Wiper motor & linkage assembly
8. Wiper motor connector

Front Wiper Motor Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	If necessary, release the wiper blade fixing clip by pulling up and remove the wiper blade from the inside radius of wiper arm.

3.	Remove the cowl top cover. (Refer to Body - "Cowl Top Cover")

4.	Disconnect the windshield deicer connector (B) after loosening the wiper moter assembly mounting bolts (A).

5.	Hold the wiper motor crank arm and remove the upper linkage (A).

Hold the wiper motor crank arm and remove the upper linkage (A).

•	Before removing the wiper motor and linkage assembly, make sure that the linkage is stoped at auto stop position.

•	To install the wiper motor crank arm exactly, check that the linkage is aligned with the crank arm in straight line and the angle of each linkages.

•	Be careful not to bend the linkage.

Remove the lower linkage (A) from the wiper motor crank arm.

•	To install the wiper motor crank arm exactly, check that the linkage is aligned with the crank arm in straight line and the angle of each linkages.

•	Be careful not to bend the linkage.

8.	Remove the crank arm (A) after loosening a nut (B).

9.	Remove the wiper motor (A) after loosening the bolts.

Installation

1.	Install the wiper motor.

Install the crank arm.

Tightening torque :

14.7 ~ 19.6 Nm (1.5 ~ 2.0 kgf.m, 10.8 ~ 14.5 lbf.ft)

•	To install the wiper motor crank arm, make sure that the linkage is aligned with the crank arm in straight line and set the angle of each linkages exactly.

3.	Install the lower and upper linkage to the wiper motor crank arm.

Install the wiper motor and linkage assembly and then connect the wiper motor connector.

Tightening torque :

7.0 ~ 11.0 Nm (0.7 ~ 1.1 kgf.m, 5.0 ~ 7.9 lbf.ft)

5.	Install the cowl top cover.

Install the windshield wiper arm and blade.

Tightening torque :

23.0 ~ 27.0 Nm (2.3 ~ 2.7 kgf.m, 16.6 ~ 19.5 lbf.ft)

•	The windshield wiper motor must be cycled to make sure that it is in the park position. If necessary, adjust the wiper arm and blade.

7.	Install the wiper arm and blade to the specified position. A : Auto stop position (Blade)

Inspection

1.	Remove the connector (A) from the wiper motor.

Attach the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 5.

No	Description
1	Ground
2	Parking
3	IGN 2
4	Low Speed
5	High Speed

Inspection (with GDS)

The wiring harness system on the body can check the failed parts more rapidly with tester for the vehicle (GDS).

The tester (GDS) provides the following information.

(1)	Self examination : Checking the failure code (DTC) and display

(2)	Sensor data : Checking the system input/output data state

(3)	Forced driving : Checking the system operation condition

(4)	Additional function : Other controlling such as he system option and zero point adjustment

2.	Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.

Select the module to be checked after selecting BCM.

•	Select "BCM" and "Instrument Panel Module (IPM)" to check the Instrument Panel Module (IPM).

4.	Select the "Input/Output monitoring" menu to search the current state of the input/output data. The input/output data for the sensors corresponding to the "Instrument Panel Module (IPM)" can be checked.

Front Washer Motor Repair procedures

Inspection

Front Washer Motor

With the washer motor connected to the reservoir tank, fill the reservoir tank with water.

•	Before filling the reservoir tank with water, check the filter for foreign material or contamination. if necessary, clean the filter.

2.	Connect positive (+) battery cables to terminal 2 and negative (-) battery cables to terminal 1 respectively.

3.	Check that the motor operates normally and the washer motor runs and water sprays from the front nozzles.

If they are abnormal, replace the washer motor.

[Front & Rear washer]

No	Description
1	Ground
2	Windshield washer (+)

Washer Fluid Level Sensor Switch

1.	Disconnect the negative (-) battery terminal.

2.	Drain the washer fluid less than 650 cc.

3.	Check for continuity between the No. 1 and No.2 terminal in each float position. There should be continuity when the float is down. There should be no continuity when the float is up.

4.	If the continuity is not as specified, replace the washer fluid level switch

Removal

•	When servicing the washer pump, be careful not to damage the washer pump seal.

•	Do not operate the washer pump before filling the washer reservoir. Failure to do so could result in premature pump failure.

1.	Disconnect the negative (-) battery terminal.

2.	Remove the right front wheel guard. (Refer to Body - "Front Wheel Guard")

3.	Remove the engine room under cover (Refer to Engine Mechanical System - "Engine Room Under Cover")

4.	Remove the washer hose (B) and disconnect the washer motor connector (A).

5.	Remove the reservoir washer inlet (A) after loosening the mounting bolt.

6.	Remove the washer motor (B) after disengaging the fixed hook (A).

7.	Remove the level sensor switch (A).

Installation

Install the washer reservoir.

•	Before installing the pump motor, check the filter for foreign material or contamination. if necessary, clean the filter into the pump motor.

2.	Install the washer motor.

3.	Install the washer hose.

4.	Connect the washer motor connector and level sensor connector.

5.	Install the tire and wheel guide cover. (Refer to Body - "Front Wheel Guard")

6.	Install the engine room under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")

7.	Check the washer motor operation.

Rain Sensor Components and Components Location

Components and Components Location

Rain Sensor Schematic Diagrams

Circuit Diagram

Rain Sensor Description and Operation

Description

Integrated Rain Sensor

Integrated rain sensor (A) controls three systems: front wiper, auto-light, and central air conditioner.

Wiper Control System

When "AUTO" switch signal is received from the multi-function switch on the right, the integrated rain sensor detects the amount of rainfall. The sensor is installed inside the upper part of the front window for wiper motor control.

This system automatically controls the operation duration and speed of the wiper depending on the measured amount of rainfall even if the driver does not operate the wiper switch.

Functions and Operating Principles

Basic Principle

Detecting the amount of rainfall

The light (beam) emitted from light emitting diodes (LED) is totally reflected on the external surface of the windshield and comes back to the photo diodes. When there is water on the external surface of the windshield, the light is optically separated and reflected partially and the remaining brightness is measured by the photo diodes. Water remaining on the windshield results in the light being not totally reflected. The loss of brightness due to this indicates how much the glass surface is wet.

Interference

Rain sensor might malfunction due to the interferences listed below.

1.	Dust on the measuring surface and other surfaces on the light path (surface of light emitting diodes and photo diodes, fiber optics, bracket, and glass surface of windshield joint area) weakens the received light.

2.	Movement of windshield and bracket

3.	Movement of bracket due to vibration

4.	Damaged wiper blade

•	When the integrated rain sensor does not operate or malfunctions, the driver should operate the wiper switch manually.

Automatic Operation

Operational status of rain sensor

Operation Mode	Operation
Direct Mode	It is the normal operational status of the integrated rain sensor when the wiper switch is in "Auto" and the sensor detected dry windshield. Based on this state, integrated rain sensor determines the operation mode of wiper depending on the rainfall and its duration.
Intermittent Mode	Integrated rain sensor activates the intermittent mode when wiper operation is done successively more than twice with a pause of 0.5 ~ 5 seconds.
Low Speed	The wiper operates continuously in low speed
High Speed	The wiper operates continuously in high speed

Safety Function

1.	When there is ice or foreign matter in the detecting area, integrated rain sensor cannot recognize the condition for operation correctly.

Detecting Special Conditions

Rain sensor

Special Condition	Operation based on special conditions detecting
Splash	When integrated rain sensor detects a high level of water (splash) in Direct or Intermittent mode, the system switches from Park to High speed. Then, wiping is done once in High speed and once more in Low speed. If the condition of rainfall does not change after wiping, it returns to the original condition (Direct or Intermittent).
Smearing	Smearing is a thin oil film that has dried fast and occurs when a small amount of rainfall is wiped by a dirty or worn-out wiper blade. Operational signal should not be issued when smearing occurs in Direct or Intermittent mode.
Dirt	When no change is detected after wiping, integrated rain sensor determines that the windshield is dirty. In this state, operational signal should not be issued. If the windshield becomes clean (for example, by washer fluid), the integrated rain sensor returns to the normal condition.
Washer fluid	Integrated rain sensor does not respond to the washer fluid during the Washer mode. In other words, wiping speed does not change even if the washer fluid is sprayed (automatic operation of the washer pump is not reflected in the functioning of integrated rain sensor).

Rain Sensor Repair procedures

Removal

•	The dust or foreign substance on the rain sensor have a bad effect upon the rain sensor capability,so protect the sensor surface with protection cover until installing the rain sensor to bracket for accurate funtion.

•	The coupling pad on the rain sensor surface has adherive strength, so the coupling pad could stick to the windshield by environment condition during the using time.

•	If separate it by force, it could be damaged. So make sure to separate the rain sensor from the windshield carefully.

1.	Reomve the rain sensor cover (A).

2.	Disconnect the wiring harness connector (A).

3.	Be careful not to damage the cover latch by applying excessive force. To remove the latch, pull aside the latch using the cover hole with a small flat - blade screwdriver (A).

4.	Rain sensor module is attached to the front windshield by glue replacing the front windshield, remove the rain sensor module from the existing front windshield and install on the new front windshield.

Installation

•	In case of the windshield with reflection layer which reflects the infrared rays in sensing field, should install the rain sensor into the field removed the reflection layer.

•	Install the rain sensor after some time and be care not to be settled the dust after installation.

Install the rainsensor bracket to the windshield glass using the tape.

•	It is very important that the coupling pad pushes the windshield completely to stick to each other without bubbles.

2.	Connect the rainsensor connector, and then install the sensor cover.

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