WIPER AND WASHER SYSTEM FAIL-SAFE CHART


  1. WIPER MOTOR PROTECTION FUNCTION


    1. If the wiper system is malfunctioning, the windshield wiper motor assembly 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 assembly if the windshield wiper motor 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 front wiper operation when the temperature is 91°C (196°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 motor from overheating.

      		 Foreign matter, such as snow, is removed and the front wiper operating range returns to normal.
      Excessive load protection Stops wiper operation when an excessive load is detected when the front wipers are near the center of the front wiper operating range. The front wiper switch is turned off and then to any operating position.

  2. RAIN SENSOR FAIL-SAFE FUNCTION


    1. The windshield wiper switch assembly performs a 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).