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.
| 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 > Air Conditioning System: Compressor Lock Sensor Circuit (B1422/22)
DESCRIPTION The ECM sends the engine speed signal to the air conditioning amplifier assembly via CAN communication. The air conditioning amplifier assembly reads the difference between compressor speed and engine speed. When the difference becomes too large, the air conditioning amplifier assembly d ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Charging System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Charging System DTC No. Detection Item Warning Indicate Memory Note Link P161A87 Lost Communication with Alternator Missing Message Charge warning light comes on DTC stored SAE Code: P161A ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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