Wiper System/washer System (Diagnostics - Introduction): Other Lexus IS III

PRECAUTION [04/2013 - ]

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Variable Gear Ratio Steering System Refer to «INITIALIZATION [04/2013 - ]»(ref-665529-S01115916402014102400000) Air Conditioning System
2. PRECAUTION FOR WASHER NOZZLE ADJUSTMENT Do not clean or adjust the washer nozzle with a safety pin, etc. because: The washer nozzle tip is made of resin and may be damaged. Adjustment is not necessary for this spray type washer nozzle. If it is necessary to change the nozzle angle, replace the washer nozzle with one that has a different nozzle angle. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665783-S33879518142014102400000) If the washer nozzle is clogged with wax, etc., remove it and clean the nozzle hole with a soft resin brush or other cleaning tool.

Scheme 23

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Scheme 28

1. WIPER AND WASHER SYSTEM
2. HEADLIGHT CLEANER SYSTEM (w/ Headlight Cleaner System)
3. WASHER FLUID LEVEL WARNING SYSTEM

Scheme 29

1. WINDSHIELD WIPER SWITCH ASSEMBLY The windshield wiper switch assembly is a momentary type switch. The switch returns to the neutral position (NEUTRAL) automatically. Switch Operation Wiper Operation OFF Turns the wipers off. (MIST operates when the wipers are stopped.) UP Switches the wiper operation as follows: HI-->LO-->OFF MIST operates when the wipers are stopped. MIST operates when INT is selected. The wiper operation will not be changed when AUTO is selected. DOWN Switches the wiper operation as follows: OFF-->LO-->HI The wiper operation is switched to LO when AUTO is selected. The wiper operation is not changed during HI operation. HI Switches to HI operation. AUTO wiper switch pressed for a short time. Switches to AUTO mode. (Using the auto sensitivity adjustment switch, sensitivity can be adjusted to 4 different levels.) AUTO wiper switch pressed for 5 seconds or more. Switches to INT mode (Using the auto sensitivity adjustment switch, sensitivity can be adjusted to 4 different levels.) *1 Windshield Wiper Switch Assembly *a AUTO Wiper ON/OFF Switch (for turning AUTO mode ON/OFF and switching wiper between AUTO/INT) *b Auto Sensitivity Adjustment Switch *c Auto Wiper Indicator *d Wiper Speed Switch Position P4 *e Wiper Speed Switch Position P3 *f Wiper Speed Switch Position P2 *g Wiper Speed Switch Position P1 *h OFF *i UP *j Neutral Position (NEUTRAL) *k DOWN *l HI The windshield wiper switch assembly displays operation guides for the AUTO wiper (AUTO Mode ON/OFF and rain sensor sensitivity level) via LIN communication on the multi-information display in the combination meter assembly. HINT: The display can be turned on/off using the customize function of the meter and gauge system. Refer to «CUSTOMIZE PARAMETERS [04/2013 - ]»(ref-665542-S23305348032014102400000)
2. AUTO WIPER SYSTEM General The auto wiper system controls the wiper timing in accordance with the amount of raindrops that strike the windshield when the wiper switch is in AUTO. The windshield wiper switch assembly controls the timing based on the signal from the rain sensor.
3. HEADLIGHT CLEANER SYSTEM Headlight cleaner operation (Normal) The headlight cleaner motor and pump assembly operate and washer fluid sprays from the headlight washer actuator sub-assembly for approximately 1 second every fifth time the washer switch is operated with the headlights turned on after the engine switch is turned on (IG).* *: The number of operations is cleared when the engine switch is turned off and will start from 0 when the engine switch is turned on (IG) again. Headlight cleaner operation (linked to first washer operation after the engine switch is turned on (IG)) The headlight cleaner motor and pump assembly operate and washer fluid sprays from the headlight washer actuator sub-assembly for approximately 1 second on the first operation of the washer switch with the headlights turned on after the engine switch is turned on (IG).
4. WASHER FLUID LEVEL WARNING When the washer fluid level is low, "Washer Fluid Low" is displayed on the multi-information display in the combination meter assembly according to a signal from the level warning switch assembly installed to the washer tank.

CAUTION / NOTICE / HINT

HINT

1. Use the following procedure to troubleshoot the wiper and washer system.
2. *: Use the Techstream.

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP Result Proceed to NEXT Result: 1 NEXT See step 2
2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK Result Proceed to NEXT Result: 1 NEXT See step 3
3. INSPECT BATTERY VOLTAGE Measure the battery voltage. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. Result Proceed to NEXT Result: 1 NEXT See step 4
4. CHECK CAN COMMUNICATION SYSTEM* Check if CAN communication DTCs are output. Refer to «DIAGNOSIS SYSTEM [04/2013 - ]»(ref-665810-S14264089842014102400000) Result Result Proceed to CAN communication DTCs are not output. A CAN communication DTCs are output. B Result: 2 B GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665785-S15342612202014102400000) Result: 1 A See step 5
5. CHECK FOR DTC* Check for DTCs. Refer to «DTC CHECK/CLEAR [04/2013 - ]»(ref-665797-S28867997182014102400000) Result Result Proceed to DTCs are not output. A DTCs are output. B Result: 2 B GO TO DIAGNOSTIC TROUBLE CODE TABLE. Refer to «DIAGNOSTIC TROUBLE CODE TABLE [04/2013 - ]»(ref-665797-S21165767562014102400000) Result: 1 A See step 6
6. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665797-S19574423402014102400000) Result Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B Result: 2 B GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665797-S19574423402014102400000) Result: 1 A See step 7
7. OVERALL ANALYSIS AND TROUBLESHOOTING Terminals of ECU Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665797-S18543286432014102400000) Inspection On-vehicle inspection Result Proceed to NEXT Result: 1 NEXT See step 8
8. ADJUST, REPAIR OR REPLACE Result Proceed to NEXT Result: 1 NEXT See step 9
9. CONFIRMATION TEST Result Proceed to NEXT Result: 1 NEXT END

FAIL-SAFE TABLE [04/2013 - ]

1. FAIL-SAFE FUNCTION The windshield wiper switch assembly performs the fail-safe function when the wiper system cannot properly receive the necessary signals for wiper system control or a wiper system component is malfunctioning. Item Fail-safe Function Conditions to Return to Normal Condition Abnormal vehicle speed signal Continues control using the vehicle speed signal received before the malfunction Receives a normal vehicle speed signal. Rain sensor LIN communication error Continues control according to the conditions detected before the malfunction LIN communication returns to normal. Rain sensor voltage is too low Rain sensor voltage returns to normal. Abnormal rain sensor signal Performs intermittent operation according to the position of the auto sensitivity adjustment switch. The rain sensor returns to normal. The rain sensor temperature is too high (90°C or higher). Stops the wiper operation The rain sensor temperature is too low (-15°C or lower).