Service Manual2005 WIPERS/WASHER SYSTEMS

SECTION 9D

WIPERS/WASHER SYSTEMS

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

SPECIFICATIONS

Fastener Tightening Specifications

Application	N•m	Lb-Ft	Lb-In
Cowl Vent Grille Screws	2.5	-	22
Washer Fluid Reservoir Bolts	9	-	80
Wiper Arm Linkage Nut	15	11	-
Wiper Arm Nut	22	16	-
Wiper Motor Bolts	4	-	35

SCHEMATIC AND ROUTING DIAGRAMS

Windshield Wipers and Washer System

Rain Sensing Wiper System

DIAGNOSIS

Two-Speed Intermittent Windshield Wipers

Windshield Wipers Do Not Work At Any Speed

Step	Action	Value(s)	Yes	No
1	Check fuse F16 and F17. Is fuse F16 and F17 blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Check the voltage at fuse F16 and F17. Is the voltage equal to the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open power supply circuit to fuse F16 and F17. Is the repair complete?	-	System OK	-
5	Disconnect the wiper motor connector. Turn the ignition ON. Turn the wiper switch to HI. Check the voltage at the wiper motor connector terminal 6. Is the voltage equal to the specified value?	11-14 v	Go to Step 6	Go to Step 7
6	Replace the wiper motor. Is the repair complete?	-	System OK	-
7	The wiper switch is still disconnected. Turn the ignition ON. Check for battery voltage at the wiper switch connector terminal A8. Is the voltage equal to the specified value?	11-14 v	Go to Step 9	Go to Step 8
8	Repair the open circuit between the wiper switch connector terminal A8 and fuse F17. Is the repair complete?	-	System OK	-
9	The wiper switch is still disconnected. Turn the wiper switch to HI. Use an ohmmeter to check for continuity between the wiper switch connector terminal A8 and A9. Does the ohmmeter indicate the specified value?	0 Ω	Go to Step 11	Go to Step 10
10	Replace the wiper switch. Is the repair complete?	-	System OK	-
11	Repair the open circuit between the wiper switch and the wiper motor. Is the repair complete?	-	System OK	-

Windshield Wipers Do Not Work On HI Speed, LO Speed OK

Step	Action	Value(s)	Yes	No
1	Turn the ignition ON. Turn the wiper switch to HI. Check voltage at the wiper motor connector terminal 6. Is the voltage equal to the specified value?	11-14 v	Go to Step 2	Go to Step 3
2	Replace the wiper motor. Is the repair complete?	-	System OK	-
3	Disconnect the wiper switch. Turn the wiper switch to HI. Use an ohmmeter to check for continuity between the wiper switch connector terminal A8 and A9. Does the ohmmeter indicate the specified value?	0 Ω	Go to Step 5	Go to Step 4
4	Replace the wiper switch. Is the repair complete?	-	System OK	-
5	Repair the open circuit between the wiper switch connector terminal A9 and the wiper motor connector terminal 6. Is the repair complete?	-	System OK	-

Windshield Wipers Do Not Work On LO Speed, HI Speed OK

Step	Action	Value(s)	Yes	No
1	Turn the ignition ON. Turn the wiper switch to LO. Check the voltage at the wiper motor connector terminal 5. Is the voltage equal to the specified value?	11-14 v	Go to Step 2	Go to Step 3
2	Replace the wiper motor. Is the repair complete?	-	System OK	-
3	Disconnect the wiper switch. Turn the wiper switch to LO. Use an ohmmeter to check for continuity between the wiper switch connector terminal A8 and A5. Does the ohmmeter indicate the specified value?	0 Ω	Go to Step 5	Go to Step 4
4	Replace the wiper switch. Is the repair complete?	-	System OK	-
5	Repair the open circuit between the wiper switch connector terminal A5 and the wiper motor connector terminal 5. Is the repair complete?	-	System OK	-

Windshield Wipers Do Not Work On Intermittent, Other Speeds OK

Step	Action	Value(s)	Yes	No
1	Turn the ignition ON. Use a voltmeter to test voltage at the ISU connector terminal D3. Is voltage equal to the specified value?	11-14 v	Go to Step 3	Go to Step 2
2	Repair the open circuit between the ISU connector terminal D3 and fuse F11. Is the repair complete?	-	System OK	-
3	Turn the ignition ON. Turn the wiper switch to INT. Check the voltage at the ISU connector terminal B1. Does the voltmeter indicate a voltage equal to the specified value?	11-14 v	Go to Step 7	Go to Step 4
4	Check for an open circuit between wiper switch connector terminal B2 and ISU connector terminal B1. Is there an open circuit?	-	Go to Step 6	Go to Step 5
5	Replace the wiper switch. Is the repair complete?	-	System OK	-
6	Repair the open circuit between wiper switch connector terminal B2 and ISU connector terminal B1. Is the repair complete?	-	System OK	-
7	Turn the ignition ON. Turn the wiper switch to INT. Check the voltage pulsing at the ISU connector terminal C3. Does the voltmeter indicate a pulsating voltage equal to the specified value?	11-14 v	Go to Step 8	Go to Step 8
8	Turn the ignition ON. Check the voltage at the wiper switch connector terminal A6. Is the voltage pulsating at the specified value?	-	Go to Step 9	Go to Step 10
9	Replace the wiper switch. Is the repair complete?	-	System OK	-
10	Repair the open circuit between the wiper switch and the wiper relay. Is the repair complete?	-	System OK	-

Windshield Wipers Do Not Return To Park Position

Step	Action	Value(s)	Yes	No
1	Turn the ignition ON. Check the voltage at the wiper motor connector terminal 2. Is the voltage equal to the specified value?	11-14 v	Go to Step 3	Go to Step 2
2	Repair the open circuit between the wiper motor and fuse F17. Is the repair complete?	-	System OK	-
3	Turn the wiper switch to HI. While turning the wiper switch OFF, check the voltage at the wiper motor connector terminal 5. Is the specified voltage indicated when the wiper switch is turned OFF?	11-14 v	Go to Step 5	Go to Step 4
4	Replace the wiper motor. Is the repair complete?	-	System OK	-
5	Disconnect the ISU. Check continuity between the ISU terminal C1 and C3. Does the ohmmeter indicate the specified value?	0 Ω	Go to Step 6	Go to Step 7
6	Repair the open circuit between the wiper motor and the ISU. Is the repair complete?	-	System OK	-
7	Replace the ISU. Is the repair complete?	-	System OK	-

Windshield Washer System

Windshield Washer Inoperative,Wipers Work OK

Step	Action	Value(s)	Yes	No
1	Activate the windshield washer switch. Do the windshield wipers operate when the washer switch is activated?	-	Go to Step 4	Go to Step 2
2	Turn the ignition ON. While activating the washer switch, test the voltage at the windshield wiper switch connector terminal A4. Is the voltage equal to the specified value?	11-14 v	Go to Step 8	Go to Step 3
3	Replace the wiper switch. Is the repair complete?	-	System OK	-
4	Check the windshield washer fluid reservoir. Is there washer fluid in the fluid reservoir?	-	Go to Step 6	Go to Step 5
5	Fill the windshield washer fluid reservoir. Is the repair complete?	-	System OK	-
6	Check the windshield washer hoses and the nozzles. Are the windshield washer hoses and the nozzles clogged or damaged?	-	Go to Step 7	Go to Step 8
7	Repair the washer hoses and the nozzles. Is the repair complete?	-	System OK	-
8	Turn the ignition ON. With the windshield washer activated, test the voltage at the windshield washer pump. Is the voltage equal to the specified value?	11-14 v	Go to Step 10	Go to Step 9
9	Repair an open circuit between the windshield washer pump and the windshield wiper switch. Is the repair complete?	-	System OK	-
10	Use an ohmmeter to measure the resistance between ground and the windshield washer pump. Is the resistance equal to the specified value?	0 Ω	Go to Step 12	Go to Step 11
11	Repair the windshield washer pump ground circuit. Is the repair complete?	-	System OK	-
12	Replace the windshield washer pump. Is the repair complete?	-	System OK	-

Rain sensing Windshield Wiper

Fault Detection

The rain sensor has two levels of fault detection as described below:

Fault A detected

Fault A is indicated when the sensor has detected that the sensor servo operating point is above the expected limits. This is an indication of damage to the windscreen in the area of the coupler or the sensor has been removed from the coupler.

Fault B detected

Fault B is indicated when the sensor has detected that it no longer is responding to rain signals. This is an indication of damage to the windscreen in the area of the coupler or, more likely, that the sensor has detected an electrical failure within the sensor.

Attachment Grade

Attachment grade is used to determine when Fault A is detected. The attachment grade value is set at 140. This allows the product to operate in all conditions other than the most severe damage to the windscreen.

Use sensitivity adjustment to indicate fault

A method to indicate detected faults is available to a service garage technician by using the sensitivity input and the wipers as an indicator. The service method is described as follows:

With ignition on, move the sensitivity adjustment to the high sensitivity setting.
Decrease the sensitivity by one setting.
If a wipe occurs, then 000Fault A has been detected and the service technician should assure that the coupler area on the windscreen is not damaged and the sensor is secured to the coupler.
Decrease the sensitivity one more setting.
If a wipe occurs, than Fault B has been detected and the sensor should be removed and replaced with a known good sensor.

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE

Windshield Wiper ARM

Removal Procedure

Open the hood.
Remove the nut from the wiper arm.
Pull the wiper arm off.

Installation Procedure

Install the wiper arm.

Notice : Dissimilar metals in direct contact with each other may corrode rapidly. Make sure to use the correct fasteners to prevent premature corrosion.

Secure the wiper arm with the nut.

Tighten

Tighten the wiper arm nut to 22 N•m (16 lb-ft).

Close the hood.

Windshield Wiper Motor

Removal Procedure

Disconnect the negative battery cable.
Remove the screws and the left side portion of the cowl vent grille.
Remove the nut and the washer that secure the wiper arm linkage to the motor driveshaft.
Pry the wiper arm linkage off the motor driveshaft.

Disconnect the electrical connector.
Remove the bolts and the wiper motor.

Installation Procedure

Notice : Dissimilar metals in direct contact with each other may corrode rapidly. Make sure to use the correct fasteners to prevent premature corrosion.

Install the wiper motor with the bolts.

Tighten

Tighten the wiper motor bolts to 10 N•m (89 lb-in).

Connect the electrical connector.

Press the wiper arm linkage onto the motor driveshaft.
Install the wiper arm linkage to the motor driveshaft with the washer and the nut.

Tighten

Tighten the wiper arm linkage nut to 8.5 N•m (75 lb-in).

Install the left side portion of the cowl vent grille with the screws.

Tighten

Tighten the cowl vent grille screws to 2.5 N•m (22 lb-in).

Connect the negative battery cable.

Windshield Wiper Blade

Removal Procedure

Rotate the wiper blade on the arm.
While pressing the retainer clip, slide the wiper blade down the wiper arm and remove the blade.

Installation Procedure

Install the wiper blade by sliding it onto the arm until the retainer clip engages.

Windshield Wiper Blade Insert

Removal Procedure

Slide the insert out of the wiper blade.

Installation Procedure

Slide the insert into the wiper blade.

Windshield Washer Reservoir

Removal Procedure

Disconnect the negative battery cable.
Remove the front right wheel. Refer to Section 2E, Tires and Wheels.
Remove the front wheel well splash shield. Refer to Section 9R, Body Front End.
Disconnect the washer hose from the washer pump.
Disconnect the electrical connectors.
Remove the bolts and the reservoir.

Installation Procedure

Notice : Dissimilar metals in direct contact with each other may corrode rapidly. Make sure to use the correct fasteners to prevent premature corrosion.

Install the reservoir with the bolts.

Tighten

Tighten the washer fluid reservoir bolts to 9 N•m (80 lb-in).

Connect the electrical connector.
Connect the washer hose to the washer pump.
Install the front wheel well splash shield. Refer to Section 9R, Body Front End.
Install the front right wheel. Refer to Section 2E, Tires and Wheels.
Connect the negative battery cable.

Windshield Washer Pump

Removal Procedure

Disconnect the negative battery cable.
Remove the right front left wheel. Refer to Section 2E, Tires and Wheels.
Remove the front wheel well splash shield. Refer to Section 9R, Body Front End.
Disconnect the electrical connector.
Disconnect the washer hose from the washer pump.
Remove the washer pump.

Installation Procedure

Install the washer pump.
Connect the washer hose to the washer pump.
Connect the electrical connector.
Install the front wheel well splash shield. Refer to Section 9R, Body Front End.
Install the right front wheel. Refer to Section 2E, Tires and Wheels.
Connect the negative battery cable.

Windshield Washer Nozzles

Removal Procedure

Open the hood.
Disconnect the washer hose from the nozzle.
Remove the nozzle from the hood.

Installation Procedure

Install the nozzle onto the hood.
Connect the washer hose to the nozzle.
Close the hood.

Windshield Washer Hoses

Removal Procedure

Open the hood.
Disconnect the windshield washer hose from the washer nozzles on the hood.
Remove the front right wheel. Refer to Section 2E, Tires and Wheels.
Remove the front wheel well splash shield. Refer to Section 9R, Body Front End.
Disconnect the washer hose from the washer reservoir.
Remove the washer hose.

Installation Procedure

Connect the washer hose to the washer pump.
Install the front wheel well splash shield. Refer to Section 9R, Body Front End.
Install the front right wheel. Refer to Section 2E, Tires and Wheels.
Connect the windshield washer hose to the washer nozzles on the hood.
Close the hood.

Rain Sensor

Removal Procedure

Disconnect the negative battery cable.
Remove the rain sensor cover.
Disconnect the electrical connector.
Remove the rain sensor.

Installation Procedure

Install the rain sensor to the optocoupler using two snap fit stainless steel clips.
Connect the electrical connector.
Install the rain sensor cover.
Connect the negative battery cable.

GENERAL DESCRIPTION AND SYSTEM OPERATION

Windshield Wiper System

The windshield wiper system consists of a wiper motor, a linkage, a wiper arm and a blade, and a wiper/washer switch. The windshield wiper circuit incorporates a selfparking device which consists of a worm gear and a cam plate in order to keep the circuit engaged temporarily when the switch is turned off. The wiper system is driven by a permanent magnet-type motor. The windshield wiper motor is mounted on the dash panel and is directly connected to the windshield wiper linkage.

The windshield wiper motor has two speeds, LO and HI, and also has intermittent wiper capability. The wiper switch is an integral part of the wiper/washer switch. Windshield wiper operation is actuated through the lever on the right side of the steering column.

Windshield Washer System

The windshield washer system is equipped with a washer fluid reservoir, a washer fluid pump, hoses, nozzles, and a wiper/washer switch. The windshield washer reservoir is mounted behind the front left wheel well splash shield. Attached to the reservoir is a washer pump, which pumps fluid through the hoses to the two nozzles mounted on the hood. The washer switch is an integral part of the wiper/washer switch. Windshield washer operation is actuated through the lever on the right side of the steering column.

Rain Sensing Wiper System

The rain sensing wiper system, in addition to providing the normal wiper functions of OFF, MIST, LOW SPEED, HIGH SPEED and WASHER, provides automatic control of DELAY, LOW SPEED, and HIGH SPEED.

The rain sensing wiper system consists of wiper switch, power relay, LOW/HI relay, rain sensor assembly, optocoupler and styling cover.

The power relay and HI/LOW relay are controlled by the rain sensor unit to control the wiper function.

The rain sensor unit is electronic module that uses infrared radiation to determine the level of windshield visibility for the driver, and commands the wiper motor assembly to drive the wipers to maintain a pre-selected level of visibility. The rain sensor module has a P.C. board sub-assembly and a microcomputer that performs the logic functions. A patented non-linear control algorithm resident in the microcomputer interprets the rain-input signal and commands the wiper motor to wipe when appropriate.

The optocoupler is a plastic optical component that couples the infrared radiation emitted from the rain sensor module to the windshield glass. The opticoupler is bonded to the windshield using an adhesive called "Sotefa" at the windshield manufacturer.

Automatic Mode

When the wiper switch is moved to AUTO position and the ignition switch is in the RUN positions, the rain sensor is considered to be in "AUTOMATIC" mode.

Power-up Reminder Wipe:

A single wipe will be performed whenever rain has been detected in the previous 5 minutes and the wiper switch is moved to the AUTO position. If the wiper switch has been left in AUTOMATIC Mode with the vehicle ignition OFF, and then the vehicle ignition switch is turned on, the Rain Sensing Wiper System will perform a single wipe.

Sensitive Adjustment Function:

The drive may adjust the rain sensor performance by adjusting the sensitivity input. When in AUTOMATIC mode, the rain sensor will perform a single wipe each time the SENSITIVITY is adjusted upward to a more sensitive setting. This single wipe will only be performed if rain has been detected in the previous 5 minutes. If the sensitivity adjustment is adjusted upward more than one step, the sensor will only perform a single wipe unless the time between increases is more than 2 seconds.

Automatic Delay

Wipers are to normally remain at "interwipe/park". The rain sensor determines the dwell time appropriate for the amount of precipitation on the windshield after considering the driver input from the switch SENSITIVITY setting. When the dwell time indicates that a wipe is needed, the rain sensor provides input to the wiper motor to activate the wipers to clear the precipitation from the windshield. For all AUTOMATIC DELAY operations the rain sensor commands the wipers to operate in LOW SPEED for one wipe. A single wipe is performed by turning on the speed 1 control circuit for 500 milliseconds.

Automatic Low

AUTOMATIC LOW SPEED operation is utilized when the amount of precipitation impinging on the windshield exceeds the AUTOMATIC DELAY to AUTOMATIC LOW threshold. This threshold includes sufficient hysterisis to prevent cycling between AUTOMATIC DELAY and AUTOMATIC LOW SPEED operation with a steady amount of precipitation accumulation on the windshield.

Automatic High

AUTOMATIC HIGH SPEED operation is utilized when the amount of precipitation impinging on the windshield exceeds the AUTOMATIC LOW to AUTOMATIC HIGH threshold. This threshold includes sufficient hysterisis to prevent cycling between AUTOMATIC LOW and AUTOMATIC HIGH SPEED operation with a steady amount of precipitation accumulation on the windshield.

The rain sensor monitors the wiper switch to determine if the wash function is selected. The rain sensor uses this information to blank or ignore the wash water input to the algorithm. Rain sensor enables the wiper motor to run in low speed during the wash mode and performs the follow up wipers per the following rules:

Wipers will turn ON 200+/-50 milliseconds after the washer switch is turned ON and OFF and 2.5 - 3.8 sec after the washer switch is OFF if the washer switch is held for more than 600+/-50 milliseconds.
When the washer lever is pressed for less than 600+/-50 milliseconds but more than 200+/-50 milliseconds, the wiper motor performs a single wiper.
When the washer lever is pressed for less than 200+/-50 milliseconds, the wipers will not be turned on.

Manual Mode

The rain sensor determines when a manual mode such as manual low, Mist, Off or manual high is selected. The column switch performs these modes and the rain sensor has no affect.