WIPER AND WASHER SYSTEM (w/ Rain Sensor) - 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

Wiper And Washer System (W/ Rain Sensor) - Wiper Switch (Hi Speed) Circuit. WIPER / WASHER. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (WINDSHIELD WIPER SWITCH ASSEMBLY)

Check the Data List for proper functioning of the windshield wiper switch.

Combination Switch
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
F 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.

NG

Go to step 2

OK

REPLACE WINDSHIELD WIPER ECU ()

2.INSPECT WINDSHIELD WIPER SWITCH

Wiper And Washer System (W/ Rain Sensor) - Wiper Switch (Hi Speed) Circuit. WIPER / WASHER. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect or remove the switch ().

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for LH Side
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
for RH Side
Tester Connection Switch Condition Specified Condition
1 (+2) - 3 (+B) Wiper switch in HI position Below 1 Ω
1 (+2) - 3 (+B) Wiper switch not in HI position 10 kΩ or higher

for LH Side
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

for RH Side
Tester Connection	Switch Condition	Specified Condition
1 (+2) - 3 (+B)	Wiper switch in HI position	Below 1 Ω
1 (+2) - 3 (+B)	Wiper switch not in HI position	10 kΩ or higher

NG

REPLACE WINDSHIELD WIPER SWITCH ()

OK

3.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - WINDSHIELD WIPER ECU)

Disconnect the E16 switch connector.

Disconnect the E83 ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for LH Side
Tester Connection Condition Specified Condition
E16-4 (+2) - E83-9 (2S) Always Below 1 Ω
E16-2 (+B) - E83-6 (ES)
E83-9 (2S) - Body ground Always 10 kΩ or higher
for RH Side
Tester Connection Condition Specified Condition
E16-1 (+2) - E83-9 (2S) Always Below 1 Ω
E16-3 (+B) - E83-6 (ES)
E83-9 (2S) - Body ground Always 10 kΩ or higher

for LH Side
Tester Connection	Condition	Specified Condition
E16-4 (+2) - E83-9 (2S)	Always	Below 1 Ω
E16-2 (+B) - E83-6 (ES)
E83-9 (2S) - Body ground	Always	10 kΩ or higher

for RH Side
Tester Connection	Condition	Specified Condition
E16-1 (+2) - E83-9 (2S)	Always	Below 1 Ω
E16-3 (+B) - E83-6 (ES)
E83-9 (2S) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE WINDSHIELD WIPER ECU ()

WIPER / WASHER

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

WIPER AND WASHER SYSTEM w/ Rain Sensor