Wiper & Washer: Overview Lexus ES XV40

DESCRIPTION

The auto wiper relay controls the front wiper motor.

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1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY Remove the windshield wiper motor assembly ( «REMOVAL»(ref-283123-S08525887132008041700000) ). Check the LO operation. Connect the positive (+) battery lead to terminal A50-5 (+1) of the connector, and the negative (-) battery lead to terminal A50-4 (E), and check that the motor operates at a low speed. Check the HI operation. Connect the positive (+) battery lead to terminal A50-3 (+2) of the connector, and the negative (-) battery lead to terminal A50-1 (+S), and check that the motor operates at a high speed. NG: REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY OK: Go to Next Step
2. CHECK HARNESS AND CONNECTOR (WIPER MOTOR - WIPER RELAY, BODY GROUND) Disconnect the A50 windshield wiper motor assembly connector. Disconnect the E11 windshield wiper relay assembly (auto wiper relay) connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A50-1 (+S) - E11-10 (+SM) Always Below 1 ohms A50-1 (+S) - Body ground Always 10 kohms or higher A50-3 (+2) - E11-3 (+2) Always Below 1 ohms A50-3 (+2) - Body ground Always 10 kohms or higher A50-4 (E) - Body ground Always Below 1 ohms A50-5 (+1) - E11-2 (+1) Always Below 1 ohms A50-5 (+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

This circuit provides power to the windshield wiper motor assembly.

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1. INSPECT FUSE (WIP) Remove the WIP fuse from the instrument panel J/B. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to Next Step
2. INSPECT IG1 RELAY Remove the IG1 relay from the instrument panel J/B. Measure the resistance of the relay. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 3 - 5 Always 10 kohms or higher When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE IG1 RELAY OK: Go to Next Step
3. CHECK HARNESS AND CONNECTOR (WIPER MOTOR - BATTERY, BODY GROUND) Disconnect the A50 windshield wiper motor assembly connector. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A50-2 (B) - Body ground Engine switch on (IG) 10 to 14 V Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A50-4 (E) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit detects the state of the windshield wiper switch assembly and sends it to the windshield wiper relay assembly (auto wiper relay).

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1. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (WIPER SWITCH AND WASHER SWITCH) Remove the windshield wiper switch assembly ( «REMOVAL»(ref-283123-S18461987082008041700000) ). Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Switch Connection Specified Condition E28-2 (+B) - E28-4 (+2) HI Below 1 ohms E28-3 (+1) - E28-2 (+B) MIST LO E28-3 (+1) - E28-1 (+S) OFF E28-9 (AUTO) - E28-10 (E) AUTO E28-7 (VR1) - E28-8 (VR2) AUTO Approximately 50 kohms NG: REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY OK: Go to Next Step
2. CHECK HARNESS AND CONNECTOR (WIPER SWITCH - AUTO WIPER RELAY, BODY GROUND) Disconnect the E11 windshield wiper relay assembly (auto wiper relay) connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E28-1 (+S) - E11-11 (+SSW) Always Below 1 ohms E28-1 (+S) - Body ground Always 10 kohms or higher E28-2 (+B) - E11-12 (IG) Always Below 1 ohms E28-2 (+B) - Body ground Always 10 kohms or higher E28-3 (+1) - E11-1 (+2S) Always Below 1 ohms E28-3 (+1) - Body ground Always 10 kohms or higher E28-4 (+2) - E11-3 (+2) Always Below 1 ohms E28-4 (+2) - Body ground Always 10 kohms or higher E28-7 (VR1) - E11-7 (VR1) Always Below 1 ohms E28-7 (VR1) - Body ground Always 10 kohms or higher E28-8 (VR2) - E11-6 (VR2) Always Below 1 ohms E28-8 (VR2) - Body ground Always 10 kohms or higher E28-9 (AUTO) - E11-17 (C1) Always Below 1 ohms E28-9 (AUTO) - Body ground Always 10 kohms or higher E28-10 (E) - E11-16 (C0) Always Below 1 ohms E28-10 (E) - Body ground Always Below 1 ohms 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 rain sensor.

The auto wiper system operates when the windshield wiper switch assembly is in the AUTO position.

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1. CHECK HARNESS AND CONNECTOR (WIPER RELAY - RAIN SENSOR) Disconnect the E11 windshield wiper relay assembly (auto wiper relay) connector. Disconnect the Q3 rain sensor connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E11-8 (SIG) - Q3-4 (SIG) Always Below 1 ohms E11-14 (PA1) - Q3-3 (AUTO) Always Below 1 ohms E11-25 (E) - Q3-1 (ES) Always Below 1 ohms Q3-4 (SIG) - Body ground Always 10 kohms or higher Q3-3 (AUTO) - Body ground Always 10 kohms or higher Q3-1 (ES) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

The windshield wiper relay assembly (auto wiper relay) controls the front washer motor.

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1. INSPECT FUSE (WASH) Remove the WASH fuse from the instrument panel J/B. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to Next Step
2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (WASHER SWITCH) Remove the windshield wiper switch assembly ( «REMOVAL»(ref-283123-S18461987082008041700000) ). Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Switch Connection Specified Condition E29-2 (EW) - E29-3 (WF) ON Below 1 ohms OFF 10 kohms or higher NG: REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY OK: Go to Next Step
3. INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY Remove the washer jar. Apply battery voltage to the windshield washer motor connector and check the operation of the windshield washer motor assembly. OK MEASUREMENT CONDITION CHART Measurement Condition Specified Condition Battery positive (+) --> Terminal A49-1 Battery negative (-) --> Terminal A49-2 Washer fluid flows from washer jar HINT: The check should be performed with the windshield washer motor and pump installed to the washer jar. NG: REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY OK: Go to Next Step
4. CHECK HARNESS AND CONNECTOR (BATTERY - WASHER MOTOR) Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester connection Condition Specified condition A49-1 - Body ground Engine switch on (IG) 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
5. CHECK HARNESS AND CONNECTOR (WASHER MOTOR - WIPER RELAY, WASHER SWITCH) Disconnect the E11 windshield wiper relay assembly (auto wiper relay) connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A49-2 - E11-4 (W) Always Below 1 ohms E29-3 (WF) - A49-2 Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

When the volume of washer fluid decreases to below a certain level (when the washer fluid level warning-switch is turned ON), the combination meter warns the driver through the master warning light illumination, the buzzer and the warning message on the multi-information display.

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1. READ VALUE OF INTELLIGENT TESTER (WASHER LEVEL) Connect the intelligent tester to the DLC3. Turn the engine switch on (IG) and turn the intelligent tester main switch on. Select the item below in the DATA LIST, and read the displays on the intelligent tester. METER: DATA LIST Tester Display Measurement Item/Range Normal Condition Diagnostic Note WASHER SW Washer fluid level switch / ON or OFF ON: Washer jar is empty OFF: Washer jar is full - NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (COMBINATION METER - WARNING SWITCH, BODY GROUND) Disconnect the E19 combination meter assembly connector. Disconnect the A48 washer fluid level warning switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E19-5 (WLVL) - A48-1 (S) Always Below 1 ohms A48-1 (S) - Body ground Always 10 kohms or higher A48-2 (E) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
3. CHECK WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition A48-1 (S) - A48-2 (E) Washer jar is empty Below 1 ohms A48-1 (S) - A48-2 (E) Washer jar is full 10 kohms or higher NG: REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit provides power to the windshield wiper relay assembly (auto wiper relay).

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1. INSPECT FUSE (WIP) Remove the WIP fuse from the instrument panel J/B. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to Next Step
2. INSPECT IG1 RELAY Remove the IG1 relay from the instrument panel J/B. Measure the resistance of the relay. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 3 - 5 Always 10 kohms or higher When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE IG1 RELAY OK: Go to Next Step
3. CHECK HARNESS AND CONNECTOR (WIPER RELAY - BATTERY, BODY GROUND) Disconnect the E11 windshield wiper relay assembly (auto wiper relay) connector. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E11-12 (IG) - Body ground Engine switch on (IG) 10 to 14 V Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E11-26 (E) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

See also:
• AIRBAG SYSTEM
• REMOVAL
• INSTALLATION