Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Fail-safe Chart

Overheat protection

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

The windshield wiper motor and link assembly returns to normal.

Snow protection

Reverses the direction of the wipers when an excessive load is detected near the extremities of the wiper operating range.

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 wiper operating range.

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

Rain sensor LIN communication error

Continues control according to the conditions detected before the malfunction

LIN communication returns to normal.

Rain sensor voltage is too low

Rain sensor voltage returns to normal.

Abnormal rain sensor signal

Performs intermittent operation according to the position of the auto sensitivity adjustment switch.

The rain sensor returns to normal.

The rain sensor temperature is too high (90°C (194°F) or higher).

Stops the wiper operation

The rain sensor temperature is too low (-15°C (5°F) or lower).