Lexus ES: Wiper and Washer Switch Circuit
DESCRIPTION
The condition of the windshield wiper switch assembly is detected and sent to the steering sensor in this circuit.
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: Chassis / Steering Angle Sensor / Data List.
(e) Read the Data List according to the display on the Techstream.
Chassis > Steering Angle Sensor > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Wiper OFF Switch | Front wiper switch OFF position signal | OFF or ON | OFF: Front wiper switch not in OFF position ON: Front wiper switch in OFF position | - |
| Wiper Auto/Int Switch | Front wiper switch AUTO*2 or INT*3 position signal | OFF or ON | OFF: Front wiper switch not in AUTO*2 or INT*3 position ON: Front wiper switch in AUTO*2 or INT*3 position | - |
| Wiper Lo Switch | Front wiper switch LO position signal | OFF or ON | OFF: Front wiper switch not in LO position ON: Front wiper switch in LO position | - |
| Wiper Hi Switch | Front wiper switch HI position signal | OFF or ON | OFF: Front wiper switch not in HI position ON: Front wiper switch in HI position | - |
| Wiper Mist Switch | Front wiper switch MIST position signal | OFF or ON | OFF: Front wiper switch not in MIST position ON: Front wiper switch in MIST position | - |
| Washer Switch | Washer switch ON position signal | OFF or ON | OFF: Front washer switch not in ON position ON: Front washer switch in ON position | - |
| Intermittent Time Volume | Auto sensitivity adjustment switch condition*2 Intermittent time adjustment switch condition*3 | Shortest, Shorter, Longer or Longest | Shortest: P4 Shorter: P3 Longer: P2 Longest: P1 | *1 |
-
*1: Refer to Inspection for each position of the switch.
Click here
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- *2: w/ Auto Wiper System
- *3: w/o Auto Wiper System
| Tester Display |
|---|
| Wiper OFF Switch |
| Wiper Auto/Int Switch |
| Wiper Lo Switch |
| Wiper Hi Switch |
| Wiper Mist Switch |
| Washer Switch |
| Intermittent Time Volume |
OK:
The Techstream display changes correctly in response to the windshield wiper switch assembly operation.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY |
(a) Remove the windshield wiper switch assembly.
Click here
(b) Inspect the windshield wiper switch assembly.
Click here
| NG | | REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY |
|
| 3. | INSPECT STEERING WHEEL SWITCH HOUSING |
(a) Remove the steering wheel switch housing.
Click here
(b) Inspect the steering wheel switch housing.
Click here
| OK | | REPLACE STEERING SENSOR |
| NG | | REPLACE STEERING WHEEL SWITCH HOUSING |
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Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE SHIFT POSITION INDICATOR (a) Disengage the 2 clamps to disconnect the wire harness. (b) Remove the 2 screws. (c) Disengage the claw and guide and remove the shift position indicator from the rear upper console panel sub-assembly.
