WIPER AND WASHER SWITCH INSPECTION

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1. Measure the voltage at each terminal (other than terminals A and F).

• If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item(s)".

2. Disconnect the wiper and washer switch connector.

3. Verify that continuity at terminals A and F is as indicated in the Terminal Voltage Table (Reference).

• If there is any malfunction, inspect the parts under "Inspection item(s)".
- If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the wiper and washer switch.

Terminal Voltage Table (Reference)

Terminal

Signal

Connected to

Test condition

Voltage (V)

Inspection item(s)

A
GND
Body GND
Under any condition: Inspect for continuity to ground.
Continuity
• GND
B
Windshield wiper HI operation input
Relay block
Turn the windshield wiper and washer switch to HI position.
Windshield wiper motor operating
1.0 or less
• Relay block
• Related wiring harness
Windshield wiper motor not operating
B+
D
Windshield washer operation input
Relay block
Turn the windshield wiper and washer switch to the washer position.
1.0 or less
• Relay block
• Related wiring harness
Except above condition
B+
E
Rear washer switch input
Relay block
Turn the windshield wiper and washer switch to the washer position.
1.0 or less
• Relay block
• Related wiring harness
Except above condition
B+
F
Auto stop operation check
Relay block
While the windshield wiper is stopped: Inspect for continuity to ground.
Continuity
• Windshield wiper motor
• Relay block
• Related wiring harness
G
Rear wiper operation input
Relay block
Turn the rear wiper and washer switch to the ON position.
Rear wiper motor operating
1.0 or less
• Relay block
• Related wiring harness
Rear wiper motor not operating
B+
I
Windshield wiper LO operation input
Relay block
Turn the windshield wiper and washer switch to the LO position.
Windshield wiper motor operating
1.0 or less
• Relay block
• Related wiring harness
Windshield wiper motor not operating
B+
J
IG1
WIPER 20 A fuse
Turn the ignition switch to the ON position.
B+
• WIPER 20 A fuse
• Related wiring harness
Turn the ignition switch to the ACC or LOCK position.
1.0 or less