Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Fail-safe Chart

Overheat protection

Decreases wiper operating speed in order to protect the windshield wiper motor assembly if the windshield wiper motor assembly temperature becomes excessively high.

• Prohibits wiper operation in HI when the windshield wiper motor assembly temperature is 95°C (203°F) or higher.
• Prohibits wiper operation in LO and HI when the windshield wiper motor assembly temperature is 100°C (212°F) or higher.
• Prohibits wiper operation when the windshield wiper motor assembly temperature is 105°C (221°F) or higher.

The windshield wiper motor assembly returns to normal.

Snow protection

Reverses the direction of the wipers and decreases their operating range when an excessive load, due to snow, etc., is detected near the extremities of the wiper operating range.

In this case, operation is stopped at the lower reverse position for a certain period of time to prevent the windshield wiper motor assembly from overheating.

Foreign matter, such as snow, is removed and the wiper operating range returns to normal.

Excessive load protection

Stops wiper operation when an excessive load is detected when the wipers are near the center of the operating range.

The front wiper switch is turned off and then to any operating position.