Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Washer Motor Circuit
DESCRIPTION
When the washer motor and pump assembly receives signals from the windshield wiper switch assembly it operates to spray washer fluid from the washer nozzle sub-assemblies.
WIRING DIAGRAM
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Wiper / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Wiper > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Washer Switch | Washer switch ON position signal | ON or OFF | ON: Front washer switch in ON position OFF: Front washer switch not in ON position | - |
| Tester Display |
|---|
| Washer Switch |
OK:
The Techstream display changes correctly in response to the front washer switch operation.
| NG | .gif) | REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY |
|
.gif)
| 2. | INSPECT WASHER MOTOR AND PUMP ASSEMBLY |
(a) Inspect the washer motor and pump assembly.
Click here .gif)
| NG | | REPLACE WASHER MOTOR AND PUMP ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (WASHER MOTOR AND PUMP ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY) |
(a) Disconnect the A34 washer motor and pump assembly connector.
(b) Disconnect the J31 windshield wiper switch assembly connector.
(c) Disconnect the J33 windshield wiper switch assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J31-5 (WR) - A34-1 | Always | Below 1 Ω |
| J33-7 (WF) - A34-2 | Always | Below 1 Ω |
| J31-5 (WR) or A34-1 - Body ground | Always | 10 kΩ or higher |
| J33-7 (WF) or A34-2 - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Headlight Cleaner Motor and Relay Circuit
DESCRIPTION The headlight cleaner motor and pump assembly is controlled by the headlight ECU sub-assembly RH. When the headlight ECU sub-assembly RH receives the washer switch operation signal 5 times ...
Washer Fluid Level Warning Switch Circuit
DESCRIPTION When the washer fluid level is lower than a certain level, a warning message is displayed on the combination meter assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fus ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Steering System: Assist Map Number Un-Writing (C1581)
DESCRIPTION This DTC will be stored if the power steering ECU assembly determines that the assist map is not written in the ECU. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C1581 Assist Map Number Un-Writing Assi ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lane Control System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
If CAN communication system and lane control system DTCs are not output and any of the following problem symptoms exist, perform troubleshooting by checking the appropriate suspected areas in the order they are listed.
Use the table below to help determine the cause ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0089