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Home >> Lexus >> 2015 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System / Washer System - Diagnostics - Introduction >> Wiper And Washer System >> Problem Symptoms Table [04/2013 - 08/2015] >> Problem Symptoms Table [04/2013 - 08/2015]
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Problem Symptoms Table [04/2013 - 08/2015]

HINT: 

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

WIPER AND WASHER SYSTEM (W/ AUTO WIPER SYSTEM)

Symptom Suspected Area Link
Front wipers do not operate at all Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in AUTO LIN communication line (DTC No. B150C) Refer to DTC CHECK / CLEAR [04/2013 - ]
Rain sensor Refer to ON-VEHICLE INSPECTION [04/2013 - ]
Rain sensor tape -
Map light assembly Refer to INSPECTION [04/2013 - 09/2020]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
When the front wiper switch is in AUTO, the rain sensor sensitivity cannot be adjusted by the windshield wiper switch adjusting switch LIN communication line (DTC No. B150C) Refer to DTC CHECK / CLEAR [04/2013 - ]
CAN communication line Refer to DIAGNOSIS SYSTEM [04/2013 - 06/2014] , or refer to DIAGNOSIS SYSTEM [06/2014 - 08/2015]
Rain sensor Refer to ON-VEHICLE INSPECTION [04/2013 - ]
Windshield glass (Rain sensor sensing portion) is dirty -
Spiral cable with sensor sub-assembly Refer to REMOVAL [04/2013 - 10/2016]
Brake actuator assembly (Skid control ECU) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 09/2020]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
When the AUTO wiper ON/OFF switch is ON, auto wiper indicator does not illuminate Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Main body ECU (Multiplex network body ECU) Refer to REMOVAL [04/2013 - ]
Instrument panel junction block assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in LO or MIST Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in HI Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front washer motor does not operate Windshield washer motor and pump assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
"Washer Fluid Low" is displayed on the multi-information display Washer fluid -
Level warning switch assembly Refer to INSPECTION [04/2013 - ]
Combination meter assembly Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]
Harness or connector -
Front wipers do not operate when the front washer switch is on Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
When the front wiper switch is off, the wiper blades do not stop (park) or stop (park) in the wrong position Windshield wiper motor assembly (Front wiper arm installation position) Refer to ON-VEHICLE INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
WIPER AND WASHER SYSTEM (W/O AUTO WIPER SYSTEM)

Symptom Suspected Area Link
Front wipers do not operate at all Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in INT Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in LO or MIST Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front wipers do not operate in HI Windshield wiper motor assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
Front washer motor does not operate Windshield washer motor and pump assembly Refer to INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
"Washer Fluid Low" is displayed on the multi-information display Washer fluid -
Level warning switch assembly Refer to INSPECTION [04/2013 - ]
Combination meter assembly Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]
Harness or connector -
Front wipers do not operate when the front washer switch is on Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
When the front wiper switch is off, the wiper blades do not stop (park) or stop (park) in the wrong position Windshield wiper motor assembly (Front wiper arm installation position) Refer to ON-VEHICLE INSPECTION [04/2013 - ]
Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Harness or connector -
HEADLIGHT CLEANER SYSTEM (W/ HEADLIGHT CLEANER SYSTEM)

Symptom Suspected Area Link
Headlight cleaner system does not operate when the front washer switch is operated Headlight cleaner hose and/or headlight cleaner washer nozzle cover -
Headlight cleaner control relay Refer to REMOVAL [04/2013 - 10/2016]
Headlight cleaner motor and pump assembly Refer to INSPECTION [04/2013 - ]
Headlight washer actuator sub-assembly Refer to REMOVAL [04/2013 - 10/2016]
Headlight leveling ECU assembly Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 09/2020]
Harness or connector -
Headlight cleaner system does not operate when the front washer switch is first operated Windshield wiper switch assembly Refer to REMOVAL [04/2013 - ]
Headlight cleaner control relay Refer to REMOVAL [04/2013 - 10/2016]
Headlight leveling ECU assembly Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 09/2020]
Harness or connector -