Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 fuses of circuits related to this system before performing the following procedure.
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 / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Combination Meter > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Washer Switch | Washer fluid level warning switch | ON or OFF | ON: Washer fluid level low OFF: Washer fluid level not low | - |
| Tester Display |
|---|
| Washer Switch |
OK:
The Techstream display changes correctly in response to the washer fluid level.
| OK | .gif) | GO TO METER / GAUGE SYSTEM |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (LEVEL WARNING SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the A59 level warning switch assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A59-1 (S) - Body ground | Engine switch off | Below 1 V |
| A59-1 (S) - Body ground | Engine switch on (IG) | 11 to 14 V |
| NG | | GO TO STEP 4 |
|
| 3. | CHECK HARNESS AND CONNECTOR (LEVEL WARNING SWITCH ASSEMBLY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A59-2 (E) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE LEVEL WARNING SWITCH ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 4. | CHECK HARNESS AND CONNECTOR (WASHER MOTOR AND PUMP ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY) |
(a) Disconnect the J10 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A59-1 (S) - J10-16 (WLVL) | Always | Below 1 Ω |
| A59-1 (S) or J10-16 (WLVL) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE COMBINATION METER ASSEMBLY |
.gif)
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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 ...
Wiper Switch
...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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