| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Wiper/Washer | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002OXF006X |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Wiper and Washer Switch Circuit |
DESCRIPTION
This circuit provides power to operate the windshield wiper switch. The manual operation signals are sent to the windshield wiper ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT FUSE (ECU-IG No. 1) |
(a) Remove the ECU-IG No. 1 fuse from the cowl side junction block LH.
(b) Measure the resistance according to the value in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-IG No. 1 fuse |
Always |
Below 1 Ω |
|
|
2. |
READ VALUE USING TECHSTREAM (WINDSHIELD WIPER SWITCH) |
(a) Using the Techstream, read the Data List.
Body No. 5
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Wiper Lo Switch |
Front wiper LO switch / ON or OFF |
ON: Front wiper switch in LO OFF: Front wiper switch not in LO |
- |
|
Wiper Hi Switch |
Front wiper HI switch / ON or OFF |
ON: Front wiper switch in HI OFF: Front wiper switch not in HI |
- |
|
Wiper Auto Switch |
Front wiper AUTO switch / ON or OFF |
ON: Front wiper switch in AUTO OFF: Front wiper switch not in AUTO |
- |
|
Wiper Mist Switch |
Front wiper MIST switch / ON or OFF |
ON: Front wiper switch in MIST OFF: Front wiper switch not in MIST |
- |
|
Washer Switch |
Front washer switch / ON or OFF |
ON: Front washer switch on OFF: Front washer switch off |
- |
Body No. 4
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Rear Wiper Lo Switch |
Rear wiper LO switch / ON or OFF |
ON: Rear wiper switch in LO OFF: Rear wiper switch not in LO |
- |
|
Rear Wiper Int Switch |
Rear wiper INT switch / ON or OFF |
ON: Rear wiper switch in INT OFF: Rear wiper switch not in INT |
- |
|
Rear Washer Switch |
Rear washer switch / ON or OFF |
ON: Rear washer switch on OFF: Rear washer switch off |
- |
OK:
The display is as specified in the normal condition.
|
|
3. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BATTERY AND BODY GROUND) |
|
(a) Disconnect the E16 switch connector. |
(b) Disconnect the E89 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E16-2 (+B) - E89-6 (ES) |
Always |
Below 1 Ω |
|
E16-10 (E) - Body ground |
||
|
E16-2 (+B) - Body ground |
10 kΩ or higher |
|
|
|