Washer Fluid Level Warning Switch Circuit
When the volume of washer fluid decreases to below a certain level (when the level warning switch is turned on), the multi-information display in the combination meter assembly displays "LOW WASHER FLUID" to warn the driver.
WIRING DIAGRAM
PROCEDURE
READ VALUE USING TECHSTREAM (WASHER SWITCH)
(a) Use the Data List to check if the level warning switch assembly is functioning properly (See page .gif)
).
Combination Meter
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
|---|---|---|---|
Washer Switch |
Level warning switch / ON or OFF |
ON: Washer jar and tank empty OFF: Washer jar and tank full |
- |
OK:
On the Techstream screen, each item changes between ON and OFF according to the above chart.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
INSPECT LEVEL WARNING SWITCH ASSEMBLY
(a) Inspect the level warning switch assembly (See page ).
| NG | | REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY |
|
CHECK WASHER WIRING ASSEMBLY
(a) Disconnect the A27 and LW washer wiring assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
|---|---|---|
A27-3 (S) - LW-1 |
Always |
Below 1 Ω |
A27-6 (E) - LW-2 |
Always |
Below 1 Ω |
A27-3 (S) or LW-1 - Body ground |
Always |
10 kΩ or higher |
A27-6 (E) or LW-2 - Body ground |
Always |
10 kΩ or higher |
| NG | | REPLACE WASHER WIRING ASSEMBLY |
|
CHECK HARNESS AND CONNECTOR (LEVEL WARNING SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND)
(a) Disconnect the A27 washer wiring assembly connector.
(b) Disconnect the F14 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
|---|---|---|
A27-3 (S) - F14-27 (WLVL) |
Always |
Below 1 Ω |
A27-6 (E) - Body ground |
Always |
Below 1 Ω |
A27-3 (S) or F14-27 (WLVL) - Body ground |
Always |
10 kΩ or higher |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.