| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Wiper/Washer | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002OXG006X |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Wiper Switch (HI Speed) Circuit |
DESCRIPTION
The windshield wiper ECU receives the HI position signal of the wiper switch to operate the wiper motor at HI speed. Even if the ECU malfunctions, its circuit structure enables it to operate the wiper in HI operation mode.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (WINDSHIELD WIPER SWITCH ASSEMBLY) |
(a) Using the Techstream, read the Data List.
Body No. 5
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Front Wiper Hi Switch |
Front wiper HI switch / ON or OFF |
ON: Front wiper switch in HI position OFF: Wiper switch not in HI position |
- |
OK:
Wiper switch operates.
|
|
2. |
INSPECT WINDSHIELD WIPER SWITCH |
(a) Remove the windshield wiper switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
4 (+2) - 2 (+B) |
Wiper switch in HI position |
Below 1 Ω |
|
4 (+2) - 2 (+B) |
Wiper switch not in HI position |
10 kΩ or higher |
|
|
3. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - WINDSHIELD WIPER ECU) |
|
(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 |
|---|---|---|
|
E16-4 (+2) - E89-9 (2S) |
Always |
Below 1 Ω |
|
E16-2 (+B) - E89-6 (ES) |
||
|
E89-9 (2S) - Body ground |
Always |
10 kΩ or higher |
|
E89-6 (ES) - Body ground |
|
|
|