Toyota CH-R Service Manual: Fail-safe Chart

FAIL-SAFE CHART

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).

    Terminals Of Ecu
    TERMINALS OF ECU CHECK WINDSHIELD WIPER RELAY ASSEMBLY (w/ Rain Sensor) (a) Disconnect the F56 windshield wiper relay assembly connector. (1) Measure the voltage and resistance on the wire harnes ...

    Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any part ...

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