Lexus IS250 IS220d GSE20 ALE20 - WIPER AND WASHER
READ VALUE OF INTELLIGENT TESTER (WIPER SWITCH)
CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)
WIPER AND WASHER SYSTEM - Wiper and Washer Switch Circuit
DESCRIPTION
This circuit provides power to operate the windshield wiper switch assembly. The manual operation signals are sent to the main body ECU LH (cowl side J/B LH).
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output .
| 1.READ VALUE OF INTELLIGENT TESTER (WIPER SWITCH) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.
Select the items below in the DATA LIST, and read the displays on the intelligent tester.
| Item | Measurement Item / Display (Range) | Normal Condition | Diagnostic Note |
| F Washer SW | Front washer switch / ON or OFF | ON: Front washer switch ON OFF: Front washer switch OFF | - |
| F Wiper Mist SW | Front wiper MIST switch / ON or OFF | ON: Front wiper switch in MIST OFF: Wiper switch not in MIST | - |
| F Wiper Hi SW | Front wiper HI switch / ON or OFF | ON: Front wiper switch in HI OFF: Wiper switch not in HI | - |
| F Wiper Lo SW | Front wiper LO switch / ON or OFF | ON: Front wiper switch in LO OFF: Wiper switch not in LO | - |
| F Wiper Int SW | Front wiper INT switch / ON or OFF | ON: Front wiper switch in INT OFF: Wiper switch not in INT | - |
| IG SW Sig | Engine switch signal / ON or OFF | ON: Engine switch on (IG) OFF: Engine switch off | - |
| F Wiper Vol Pos | Front wiper volume (sensitivity) / 0 to 90 degrees | 0 degrees: FR wiper volume "+" position 27 degrees: Switch is turned one notch towards the "-" side from the FR wiper volume "+" position 63 degrees: Switch is turned one notch towards the "+" side from the FR wiper volume "-" position 90 degrees: FR wiper volume "-" position | If the value is NG, replace the windshield wiper switch assembly . |
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| OK | ||
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| 2.CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU) |
Disconnect the J26 windshield wiper switch assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition J26-1 (B) - J26-5 (E) Always 10 to 14 V
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| OK | ||
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