Hyundai Elantra CN7: Windshield Wiper/Washer

Seventh generation (CN7; 2021–2024) / Hyundai Elantra CN7 2021-2024 Workshop 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)

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. (Refer to Body - "Steering Column Shroud Panel")

4.	Disconnect the clock spring connector (A) and multifunction switch connector (B).

5.	Remove the clock spring (A).

6.	Loosen the clamp (A) and remove 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

Windshield Wiper/Washer Switch Inspection

Check for continuity between the terminals in each switch position as shown below.

Deiscripsion	Switch	Resistance Value (Ω, ±3.5%)
Wiper switch signal	MIST	330
	OFF	∞
	INT (AUTO)	800
	Low	1800
	High	5700
Front wiper INT volume	Volume 1 (Fast)	330
	Volume 2	690
	Volume 3	1310
	Volume 4	2610
	Volume 5	7310
Fog lamp switch	OFF	∞
	Front	910
	Rear	2910
Turn signal lamp switch	OFF	∞
	L/C_LH	910
	T_SIG_LH	2910
	L/C_RH	910
	T_SIG_RH	2910
Head lamp Passing / High beam switch	OFF	∞
	Passing	910
	Dimmer	2910
Light Switch	OFF	680
	Auto	1680
	Tail lamp	5580
	Head lamp(Low)	∞

Inspection (With Diagnostic tool)

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).

The diagnostic system (Diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

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

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	If diagnose the vehicle by Diagnostic tool, select "DTC Analysis" and "Vehicle".

3.	If check current status, select the "Data Analysis" and "Car model".

4.	Select the 'IBU_BCM' to search the current state of the input/output data.

Front Wiper Motor

Components and components location

Component Location

1. Cap
2. Nut
3. Wiper arm & blade
4. Cowl top cover

5. Bolt
6. Wiper motor & linkage assembly
7. Wiper motor connector

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.	Remove the windshield wiper motor and linkage assembly (A) after removing 2 bolts.

5.	Disconnect the wiper motor connector (A) from the wiper motor & linkage assembly.

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

•	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.

7.	Loosen the mounting nut, screws and remove the crank arm (A) and wiper motor (B).

Installation

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)

Install the crank arm.

Tightening torque :

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

3.	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.

5.	Install the wiper arm and blade to the specified position.

Inspection

1.	Remove the connector 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

Diagnosis with Diagnostic tool

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).

The diagnostic system (Diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

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

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	If diagnose the vehicle by Diagnostic tool, select "DTC Analysis" and "Vehicle".

3.	Select the 'Data Analysis'.

4.	Select the 'IBU_BCM' to search the current state of the input/output data.

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.

No	Description
1	Ground
2	Windshield washer (+)

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).

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

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).

Components and components location

Components and Components Location

Schematic diagrams

Circuit Diagram

Repair procedures

Removal

•	It may be damaged when you try to remove the rain sensor from the windshield forcibly. Use caution when sepearting it from the windshield.

•	When detaching the silicone under a high temperature, it may be easily damaged because of the adhesive strength of the silicone. Remove the silicone in a cool enviroment.

1.	Remove the inside rear view mirror cover (A).

2.	Using a remover and remove the rain sensor cover (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).

Remove the rain sensor.

(1)	Insert a small flat-blade screwdriver (-) into a space at the bottom (B) or top (A), between the rain sensor and bracket. .

(2)	Pull the rain sensor slowly up and down in the vertical direction of the glass, then disassemble the rain sensor slowly from windshield without damaging the silicone on the sensor.

Installation

•	Check the operation of the rain sensor and the light sensor before mounting.

–	Check the sensor for silicon damage.

–	Check whether the rain sensor connector is tightened.

–	Check whether the rain sensor and bracket are properly tightened.

–	Check whether the sensor mounted area is free from foreign matters.

–	Recalibrate sensitivity of the swtich if the auto-wiping operation is insensitivity or too much sensitive.

•

In case the silicone of the rain sensor is normal or slightly damaged as shown in the below images, it can be reused.

Normal	Damage within 1.5 mm of outer part

•

In case the silicone of the rain sensor is damaged as shown in the below images, it should be replaced with a new silicone.

Foreign substances	Fingerprint	Damege

Damege

•

In case the silicone of the rain sensor is damaged it should be replaced it as shown below.

1) Remove the damaged silicone gel pad from the lens plate completely.

•	Be careful not to damage or contaminate the surface of the lens plate during removal.

2) Attach the new silicone gel pad aftet removing the silicone paper (A) then remove the transperent film (B).

•	When attaching the silicone gel pad to the sensor, be careful not to contaminate

•	It is very important that the silicon (coupling pad) is completely pushed against the windshield and stuck without any air bubble.

•	In case of replacing the damaged windshield, you may reuse the undamaged exisitng rain sensor.

•	The windshield glass has to be clean and free of contamination or foreign substances.

1.	Connect the rain sensor connector.

Push one of the latch of spring arm (A) down until it snaps and you hear a click sound.

And then push the latch of second spring arm (B) for keeping the sensor in right position.

•	Do not snap both spring arms at the same time.

•	An incorrectly mounted snap connection may cause malfunctions of the rain/light sensor.

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