Lexus NX: System Description



(a) This system operates the front wipers at low speed immediately after spraying a jet of washer fluid when the front washer switch is turned on for 0.3 seconds or more.

The system operates the front wipers at low speed for approximately 2.2 seconds and then stops operation when the washer switch is turned on for 1.5 seconds or more.


(a) The rain sensing function controls the wiper timing in accordance with the amount of raindrops that strike the windshield when the windshield wiper switch assembly is in AUTO.

(b) The windshield wiper switch assembly controls the timing based on the signal from the rain sensor.

HEADLIGHT CLEANER FUNCTION (w/ Headlight Cleaner System)

(a) The headlight cleaner system operates only once the first time and every 5 times the front washer switch is operated.

Headlight Beam (LO/HI)

Washer Switch (Windshield Wiper Switch Assembly)

On (First Time)

On (Second Time to Fourth Time)

On (Sixth Time and Every Five Times)

Turn on


Not Activated


Turn off

Not Activated

Not Activated

Not Activated


(a) When the volume of washer fluid decreases to below a certain level (when the level warning switch is turned on), the multi-information display warns the driver by displaying a message.


 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the wiper and washer system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT

 Problem Symptoms Table

PROBLEM SYMPTOMS TABLE NOTICE: Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU). If the main body ECU (multiplex network body ECU) is repla

 Terminals Of Ecu

TERMINALS OF ECU CHECK WINDSHIELD WIPER RELAY ASSEMBLY (w/ Rain Sensor) (a) Disconnect the I56 windshield wiper relay assembly connector. (b) Measure the voltage and resistance according to the value


 Left Low Beam Fan Malfunction (B243D,B243E)

DESCRIPTION This DTC is output when the low beam fan is malfunctioning and the low beam illumination is dark. The headlight ECU sub-assembly LH outputs DTC B243D and B243E DTC No. Detection Item DTC Detection Condition Trouble Area B243D Left Low Beam Fan Malfunction The headlight a

 Rear Vision Camera (RVC)

The RVC can assist when backing up by displaying a view of the area behind the vehicle. Warning The camera(s) do not display children, pedestrians, bicyclists, crossing traffic, animals, or any other object outside of the cameras' field of view, below the bumper, or under the vehicle. Shown distance

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