Wiper & Washer: Overview Lexus LS IV

SYSTEM DESCRIPTION

1. FRONT WIPER SYSTEM The front wiper system receives the wiper operation signal from the windshield wiper switch, and the front light ECU operates the front wiper motor. The front light ECU adjusts the intermittent interval during wiper motor operation according to commands received from the windshield wiper switch. This adjustment is based on vehicle speed, brake signals, etc., and a determination of the vehicle driving and stopping conditions during the intermittent operation. The system has the following functions: FUNCTION CHART Function Outline Vehicle speed sensing intermittent wiper function* This function controls intermittent interval of wipers according to vehicle speed when wiper switch is in INT position Vehicle speed switching function This function automatically switches wipers on or off when vehicle is stopped or starts moving with wiper switch in LO position HINT: *: The vehicle speed sensing intermittent wiper function operates even when the fail-safe function operates due to a malfunction in the auto wiper function.
2. FRONT WASHER SYSTEM The front washer system receives the wiper operation signal from the windshield wiper switch, and the front light ECU operates the front washer motor.
3. CONTINUOUS FRONT WASHER WIPER SYSTEM The continuous front washer system receives the washer operation signal from the windshield wiper switch, and the front light ECU operates the wiper motor. The front wipers are operated 3 times after the front washer is stopped. The front wiper stops after operating 3 times from the point where the front washer switch has been ON for more than 40 seconds continuously. The front wipers are then operated once at an interval of 3 to 7 seconds. The interval is determined by the vehicle speed signal received from the combination meter.
4. AUTOMATIC WIPER SYSTEM In the automatic wiper system, the rain sensor mounted in the upper portion of the windshield sends a front wiper operation command, based on the amount of rainfall, to the front light ECU. The front wipers operate when the windshield wiper switch is in the AUTO position. The rain sensor sensitivity can be adjusted with the rain sensor adjusting switch. In this system, the front light ECU receives the vehicle speed signal from the combination meter, and operates the front wipers according to the vehicle speed. The front light ECU adjusts the intermittent interval during wiper motor operation according to commands received from the rain sensor. This adjustment is based on vehicle speed, brake signals, etc., and a determination of the vehicle driving and stopping conditions during the intermittent operation.
5. HEADLIGHT CLEANER SYSTEM The headlight cleaner system operates when the headlights are ON and the light control rheostat is pushed ON. It also operates when the headlights are ON and the front wiper washer system is operating. However, it does not operate when the daytime running light system is operating.

DESCRIPTION

The front light ECU controls the wiper motor.

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1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (FRONT WIPER MOTOR) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check the front wiper motor. NOTE: When a BODY N0.5 (front light ECU) related vehicle switch is ON, ACTIVE TEST items related to the vehicle switch are prohibited (double operation prohibition). Check that the vehicle switches are OFF before performing ACTIVE TEST. Front Light ECU: FRONT LIGHT ECU REFERENCE CHART Item Test Part Diagnostic Note Wiper Mot (HI) Front wiper motor HI operation ON/OFF Wiper Mot (LO) Front wiper motor LO operation ON/OFF OK: Front wiper motor operates. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE» NG: Go to next step
2. INSPECT FRONT WIPER MOTOR Remove the front wiper motor. Check the LO operation. Connect the positive (+) battery lead to terminal 1 (+1) of the connector and the negative (-) battery lead to terminal 5 (E), and check that the motor operates at low speed. OK: Motor operates at low speed Check the HI operation. Connect the positive (+) battery lead to terminal 4 (+2) of the connector and the negative (-) battery lead to terminal 5 (E), and check that the motor operates at high speed. OK: Motor operates at high speed NG: REPLACE FRONT WIPER MOTOR (See «REMOVAL» ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (WIPER MOTOR - LIGHT ECU AND BODY GROUND) Disconnect the A32 motor connector. Disconnect the A51 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A32-2 (B) - A51-2 (WIG) Always Below 1 ohms A32-1 (+1) - A51-8 (S/S) Always Below 1 ohms A32-4 (+2) - A51-9 (+2) Always Below 1 ohms A32-3 (+S) - A51-1 (S/M) Always Below 1 ohms A32-5 (E) - Body ground Always Below 1 ohms A32-3 (+S) - Body ground Always 10 kohms or higher A32-2 (B) - Body ground Always 10 kohms or higher A324 (+2) - Body ground Always 10 kohms or higher A32-1 (+1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

The front light ECU receives the HI position signal of the wiper switch to operate the wiper motor at HI speed. Even if the ECU malfunctions, its circuit structure enables it to operate the wiper in HI operation mode.

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1. CHECK FRONT LIGHT ECU (2S SIGNAL) Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition A51-14 (2S) - Body ground Wiper switch not in HI position 11 to 14 V A51-14 (2S) - Body ground Wiper switch in HI position Below 1 V OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE» NG: Go to next step
2. INSPECT WINDSHIELD WIPER SWITCH (COMBINATION SWITCH) Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Switch Condition Specified Condition 3 (2S) - 8 (E) Wiper switch in HI position Below 1 ohms 3 (2S) - 8 (E) Wiper switch not in HI position 10 kohms or higher NG: REPLACE WINDSHIELD WIPER SWITCH (See «REMOVAL» ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (WIPER SWITCH - LIGHT ECU AND BODY GROUND) Disconnect the L25 switch connector. Disconnect the A51 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition L25-3 (2S) - A51-14 (2S) Always Below 1 ohms L25-8 (E) - Body ground Always Below 1 ohms A51-14 (2S) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

This circuit provides power to operate the windshield wiper switch. The manual operation signals are sent to the front light ECU.

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1. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (WINDSHIELD WIPER SWITCH) Check the DATA LIST for proper functioning of the windshield wiper switch. Combination switch (Windshield Wiper Switch): COMBINATION SWITCH REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Front Wiper OFF Switch Front wiper OFF switch/ON or OFF ON: Front wiper switch in OFF position OFF: Wiper switch not in OFF position - F Wiper LO Switch Front wiper LO switch/ON or OFF ON: Front wiper switch in LO OFF: Front wiper switch not in LO - F Wiper HI Switch Front wiper HI switch/ON or OFF ON: Front wiper switch in HI OFF: Front wiper switch not in HI - F Wiper AUTO Switch Front wiper AUTO switch/ON or OFF ON: Front wiper switch in AUTO OFF: Front wiper switch not in AUTO - F Wiper MIST Switch Front wiper MIST switch/ON or OFF ON: Front wiper switch in MIST OFF: Front wiper switch not in MIST - F Washer Switch Front washer switch/ON or OFF ON: Front washer switch ON OFF: Front washer switch OFF - Wiper Volume Position Front wiper volume (sensitivity)/0 to 90 degrees 0 degrees/FR wiper volume "+" position 27 degrees/Switch is turned one notch towards the "-" side from the FR wiper volume "+" position 63 degrees/Switch is turned one notch towards the "+" side from the FR wiper volume "-" position 90 degrees/FR wiper volume "-" position - Ignition Switch Engine switch signal/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK: The display is as specified in the normal condition. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE» NG: Go to next step
2. CHECK HARNESS AND CONNECTOR (WIPER SWITCH - BATTERY AND BODY GROUND) Disconnect the L25 switch connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition L25-1 (B) - Body ground Always 11 to 14 V L25-2 (IG) - Body ground Engine switch on (IG) 11 to 14 V L25-2 (IG) - Body ground Engine switch off Below 1 V Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition L25-8 (E) - Body ground Always Below 1 ohms OK: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

The auto wiper system adjusts the wiper speed to the optimum speed based on the amount of rain. The rain sensor mounted on the windshield detects rainfall. This system operates when the windshield wiper switch is set to AUTO. The rain sensor sensitivity can be adjusted with the rain sensor adjusting switch. Signals are sent to the front light ECU from the windshield wiper switch through the CAN line, and from the rain sensor through the LIN line. Based on these signals, the front light ECU operates the wiper and determines its operation speed.

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This circuit detects the conditions of the headlight control rheostat.

The headlight cleaner control relay receives the following signals through the CAN line

1. Headlight control rheostat signal
2. Headlight operating signal
3. Daytime running light operating signal
4. Front washer motor operating signal

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1. CHECK FRONT LIGHT ECU (HDLO SIGNAL) Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition A51-5 (HDLO) - Body ground Engine switch on (IG), light control switch OFF 11 to 14 V A51-5 (HDLO) -Body ground Engine switch on (IG), light control switch in HEAD or TAIL Below 1 V NG: Go to step 5 OK: Go to next step
2. CHECK FRONT LIGHT ECU (FRWA SIGNAL) Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition A51-7 (FRWA) - Body ground Engine switch on (IG), front washer is stopped 10 to 14 V A51-7 (FRWA) - Body ground Engine switch on (IG), front washer is operated Below 1 V NG: Go to step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (RHEOSTAT - BODY GROUND) Disconnect the L8 rheostat connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Condition Specified Condition L8-2 (B) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition L8-S (E) - Body ground Below Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HEADLIGHT CLEANER CONTROL RELAY Disconnect the A6 relay connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Condition Specified Condition A6-2 (H) - Body ground Always 11 to 14 V NG: Go to step 7 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»
5. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU) Disconnect the A6 relay connector. Disconnect the A51 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A6-1 (HDLO) - A51-5 (HDLO) Always Below 1 ohms A6-1 (HDLO) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»
6. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU) Disconnect the A6 relay connector. Disconnect the A51 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A6-5 (FRWA) - A51-7 (FRWA) Always Below 1 ohms A6-5 (FRWA) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»
7. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - FRONT LIGHT ECU) Disconnect the A6 relay connector. Disconnect the A51 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A6-2 (H) - A51-6 (H) Always Below 1 ohms A6-2 (H) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

This circuit provides power to the headlight cleaner control relay.

The headlight cleaner control relay sends the signal from the switch, etc. to the headlight cleaner motor to operate the headlight cleaner system.

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1. INSPECT FUSE (E/G RM-IG 1-2) Remove the E/G RM-IG 1-2 fuse from the engine room No. 2 relay block. Measure the resistance of the fuse. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition E/G RM-IG 1-2 fuse Always Below 1 ohms NG: REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (CONTROL RELAY - BATTERY AND BODY GROUND) Disconnect the A6 relay connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Condition Specified Condition A6-3 (IG) - A6-4 (E) Engine switch on (IG) 11 to 14 V A6-3 (IG) - A6-4 (E) Engine switch off Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT HEADLIGHT CLEANER MOTOR Remove the headlight cleaner motor. Apply battery voltage to the headlight cleaner motor and check the operation of the headlight cleaner motor. OK MEASUREMENT CONDITION REFERENCE CHART Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery positive (-) --> Terminal 2 Headlight cleaner motor operation is normal NG: REPLACE HEADLIGHT CLEANER MOTOR (See «REMOVAL» ) OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (CLEANER MOTOR - CONTROL RELAY AND BATTERY) Disconnect the A3 motor connector. Disconnect the A6 relay connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Condition Specified Condition A3-1 - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A3-2 - A6-6 (PB) Always Below 1 ohms A3-2 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

The front light ECU receives washer switch information from the front wiper switch, and operates the wash relay.

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1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (FRONT WASHER MOTOR) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check the front washer motor. NOTE: When a BODY NO. 5 (front light ECU) related vehicle switch is ON, ACTIVE TEST items related to the vehicle switch are prohibited (double operation prohibition). Check that the vehicle switches are OFF before performing ACTIVE TEST. Front light ECU: FRONT LIGHT ECU REFERENCE CHART Item Test Part Diagnostic Note Washer Motor Operation Washer motor OFF/ON OK: Washer motor operates. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE» NG: Go to next step
2. INSPECT FRONT WASHER MOTOR Remove the front washer motor. Apply battery voltage to the front washer motor and check the operation of the front washer motor. OK MEASUREMENT CONDITION REFERENCE CHART Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 Battery negative (-) --> Terminal 2 Windshield washer motor operation is normal NG: REPLACE FRONT WASHER MOTOR (See «REMOVAL» ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (WASHER MOTOR - LIGHT ECU) Disconnect the A51 ECU connector. Disconnect the A1 motor connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A1-1 -A51-17 (W+) Always Below 1 ohms A1-2 - Body ground Always Below 1 ohms A1-1 - Body ground Always 10 kohms higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

The front light ECU receives washer fluid level warning switch information, and sends it through CAN line to the combination meter. The combination meter receives this information, and turns on the washer fluid level warning switch when the washer fluid becomes low.

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1. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (WASHER FLUID LEVEL WARNING SWITCH) Check the DATA LIST for proper functioning of the washer fluid level warning switch. OK: The display is as specified in the normal condition. Front light ECU: FRONT LIGHT ECU REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Washer Level switch Washer fluid level warning switch/ON or OFF ON: Washer jar and tank is empty OFF: Washer fluid is full - OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE» NG: Go to next step
2. INSPECT WASHER FLUID LEVEL WARNING SWITCH Disconnect the A2 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A2-1 (SLR1) - A2-2 (E) Washer jar and tank is empty Below 1 ohms A2-1 (SLR1) - A2-2 (E) Washer jar and tank is full 10 kohms or higher NG: REPLACE WASHER FLUID LEVEL WARNING SWITCH (See «DISASSEMBLY» ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (WARNING SWITCH - LIGHT ECU AND BODY GROUND) Disconnect the A2 switch connector. Disconnect the A52 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A2-1 (SLR1) - A52-13 (WLVL) Always Below 1 ohms A2-2 (E) - Body ground Always Below 1 ohms A2-1 (SLR1) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

This circuit provides power to the front wiper motor and operates the front light ECU.

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1. INSPECT FUSE (WIP) Remove the WIP fuse form the engine room No. 2 relay block. Measure the resistance of the fuse. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition WIP fuse Always Below 1 ohms NG: REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (LIGHT ECU - BATTERY) Disconnect the A51 light ECU connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition A51-2 - Body ground Engine switch on (IG) 11 to 14 V A51-2 - Body ground Engine switch off Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (LIGHT ECU - BODY GROUND) Disconnect the A50 ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE Tester Connection Condition Specified Condition A50-2 - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»

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1. REMOVE COWL TOP VENTILATOR LOUVER RH Remove the 6 clips and cowl top ventilator louver RH.
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
3. REMOVE FRONT WIPER ARM LH Remove the nut, wiper arm and blade.
4. REMOVE FRONT WIPER ARM RH Remove the nut, wiper arm and blade.
5. REMOVE ENGINE ROOM SIDE COVER LH (See «REMOVAL» )
6. REMOVE ENGINE ROOM SIDE COVER RH (See «REMOVAL» )
7. REMOVE FRONT FENDER PROTECTOR UPPER LH Using a clip remover, detach the clips and remove the fender protector upper.
8. REMOVE FRONT FENDER PROTECTOR UPPER RH HINT: Use the same procedures described for the LH side.
9. REMOVE HOOD TO COWL TOP SEAL Using a clip remover, disengage the 11 clips.
10. REMOVE FRONT FENDER TO COWL SIDE SEAL LH Pull the cowl side seal in the direction indicated by the arrow in the illustration to detach the 2 claws and remove the cowl side seal.
11. REMOVE FRONT FENDER TO COWL SIDE SEAL RH HINT: Use the same procedures described for the LH side.
12. REMOVE COWL TOP VENTILATOR LOUVER PROTECTOR LH Remove the clip and cowl top ventilator louver protector LH.
13. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY Remove the 2 clips. Disengage the 9 claws. Remove the cowl top ventilator louver.
14. REMOVE WINDSHIELD WIPER LINK ASSEMBLY Disconnect the connector. Then detach the 2 clamps and remove the wire harness from the cowl top panel. Remove the 4 bolts and wiper motor and link. HINT: The 3 bolts labeled (A) in the illustration cannot be removed from the wiper motor and link because they are integrated into the wiper motor and link.
15. REMOVE WIPER MOTOR COVER Remove the wiper motor cover. HINT: Tape the screwdriver tip before use.
16. REMOVE WINDSHIELD WIPER MOTOR ASSEMBLY Using a screwdriver, disconnect the rod of the wiper link from the wiper motor as shown in the illustration. HINT: Tape the screwdriver tip before use. Place matchmarks on the wiper motor and crank arm. Remove the nut and crank arm. Remove the 3 bolts and wiper motor.

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1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY Check the LO operation. Connect the positive (+) battery lead to terminal 5 (+1) of the connector and the negative (-) battery lead to terminal 4 (E), and check that the motor operates at low speed (LO). OK: Motor operates at low speed (LO). If the result is not as specified, replace the motor. Check the HI operation. Connect the positive (+) battery lead to terminal 3 (+2) of the connector and the negative (-) battery lead to terminal 4 (E), and check that the motor operates at high speed (HI). OK: Motor operates at high speed (HI). If the result is not as specified, replace the motor. Check the automatic stop operation. Connect the positive (+) battery lead to terminal 5 (+1) of the connector and the negative (-) battery lead to terminal 4 (E). With the motor operating at low speed (LO), disconnect terminal 5 (+1) to stop the wiper motor operation at any position other than the automatic stop position. Using SST, connect terminals 1 (S) and 5 (+1). Then connect the positive (+) battery lead to terminal 2 (B) of the connector to restart the motor operation at low speed (LO). SST 09843-18040 Check that the motor stops automatically at the automatic stop position. OK: Automatically stops. If the result is not as specified, replace the motor.

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1. INSTALL WINDSHIELD WIPER MOTOR ASSEMBLY Install the wiper motor with the 3 bolts. Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) Align the nut with the matchmarks and install the crank arm. Torque: 17.2 N*m (175 kgf*cm, 13 ft.*lbf) Install the rod of the wiper link to the crank arm.
2. INSTALL WIPER MOTOR COVER Install the wiper motor cover.
3. INSTALL WINDSHIELD WIPER LINK ASSEMBLY Install the wiper motor and link assembly with the 4 bolts. Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) Connect the connector. Then attach the 2 clamps to install the wire harness to the cowl top panel.
4. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY Push the ventilator louver in the direction indicated by the arrow in the illustration to attach the 9 claws and 2 clips and install the ventilator louver.
5. INSTALL COWL TOP VENTILATOR LOUVER PROTECTOR LH Attach the clip and cowl top ventilator louver protector LH.
6. INSTALL FRONT FENDER TO COWL SIDE SEAL LH Push the cowl side seal in the direction indicated by the arrow in the illustration to attach the 2 claws and install the cowl side seal.
7. INSTALL FRONT FENDER TO COWL SIDE SEAL RH HINT: Use the same procedures described for the LH side.
8. INSTALL HOOD TO COWL TOP SEAL Attach the 11 clips and install the cowl top seal.
9. INSTALL FRONT FENDER PROTECTOR UPPER LH Attach the clips to install the fender protector upper.
10. INSTALL FRONT FENDER PROTECTOR UPPER RH HINT: Use the same procedures described for the LH side.
11. INSTALL ENGINE ROOM SIDE COVER RH (See «INSTALLATION» )
12. INSTALL ENGINE ROOM SIDE COVER LH (See «INSTALLATION» )
13. INSTALL FRONT WIPER ARM LH Stop the wiper motor at the automatic stop position. Clean the wiper arm serration with a round file or equivalent. Clean the wiper pivot serration with a wire brush. Install the wiper arm and blade with the nut. Make sure that the wiper arm and blade comes to the position shown in the illustration. Standard measurement STANDARD MEASUREMENT Position Specified Condition A 16.3 mm (0.64 in.) B 61.7 to 76.7 mm (2.43 to 3.02 in.) Torque: 22.0 N*m (224 kgf*cm, 16 ft.*lbf) HINT: Hold down the wiper arm hinge with your hand while tightening the nut.
14. INSTALL FRONT WIPER ARM RH Stop the wiper motor at the automatic stop position. Clean the wiper arm serration with a round file or equivalent. Clean the wiper pivot serration with a wire brush. Install the wiper arm and blade with the nut. Make sure that the wiper arm and blade comes to the position shown in the illustration. Standard measurement STANDARD MEASUREMENT Position Specified Condition A 23.2 mm (0.91 in.) B 35.6 to 50.6 mm (1.40 to 1.99 in.) Torque: 22.0 N*m (224 kgf*cm, 16 ft.*lbf) HINT: Hold down the wiper arm hinge with your hand while tightening the nut. Operate the front wipers while spraying washer fluid on the windshield glass. Make sure that the front wipers function properly and there is no interference with the vehicle body.
15. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
16. INSTALL COWL TOP VENTILATOR LOUVER RH Install the 6 clips and cowl top ventilator louver RH. NOTE: Be sure to install the cowl top ventilator louver RH properly. If it is not installed properly, water may enter the engine room and cause malfunctions.
17. PERFORM INITIALIZATION Perform initialization (see «INITIALIZATION» ). NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.

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See also:
• CAN COMMUNICATION SYSTEM
• REMOVAL
• REMOVAL