Toyota 4Runner: Washer Fluid Level Warning Switch Circuit
DESCRIPTION
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
|
1. |
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)
|
2. |
INSPECT LEVEL WARNING SWITCH ASSEMBLY |
(a) Inspect the level warning switch assembly (See page
).
| NG | |
REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY |
|
|
3. |
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 |
|
|
4. |
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 |
Rear Washer does not Operate
DESCRIPTION
The windshield wiper switch controls the rear washer motor and pump.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before perf ...
Wiper Switch
...
Other materials about Toyota 4Runner:
Rear Occupant Classification Sensor RH Collision Detection (B1788)
DESCRIPTION
DTC B1788 is stored when the occupant classification ECU receives a collision
detection signal, which is sent by the occupant classification sensor rear RH when
an accident occurs.
DTC B1788 is also stored when the separate type front seat cu ...
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL REAR PROPELLER SHAFT UNIVERSAL JOINT SPIDER BEARING
HINT:
Use the same procedure for all rear propeller shaft universal joint spider bearing.
(a) Apply MP grease to the universal joint spider and new bearings.
...
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