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

FAIL-SAFE CHART

AUTO WIPER FAIL-SAFE FUNCTION

(a) If the wiper system is malfunctioning, the windshield wiper motor and link assembly (wiper ECU) performs a fail-safe function to control the system.

Item

Fail-Safe Function

Conditions to Return to Normal Condition

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.

  • Prohibits wiper operation in HI when the temperature is 85 °C (185 °F) .or higher.
  • Prohibits wiper operation in LO and HI when the temperature is 88 °C (190 °F) or higher.
  • Prohibits wiper operation when the temperature is 91 °C (196 °F) or higher.

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 FAIL-SAFE FUNCTION

(a) The windshield wiper switch assembly performs the fail-safe function when the wiper system cannot properly receive the necessary signals for wiper system control or a wiper system component is malfunctioning.

Item

Fail-safe Function

Conditions to Return to Normal Condition

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).

    Dtc Check / Clear
    DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / (desired system) / ...

    Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Knock Sensor: Components
    COMPONENTS ILLUSTRATION *1 KNOCK CONTROL SENSOR (for Bank 1) *2 KNOCK CONTROL SENSOR (for Bank 2) N*m (kgf*cm, ft.*lbf): Specified torque * For use with a union nut wrench ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Automatic Transaxle Fluid: Adjustment
    ADJUSTMENT PROCEDURE 1. PRECAUTIONS AND WORK DESCRIPTION (a) The U881F automatic transaxle assembly does not have an oil filler tube and oil level gauge. When adding automatic transaxle fluid, add automatic transaxle fluid through the refill hole on the automatic transaxle case sub-assembly. The aut ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.0104