Rain / Light Sensor Initialization (If Equipped)

Precautions: Precautions for Working on Rain-Sensing Wiper System · Precautions for Body, Cab and Accessories · General safety (00)

Rain / Light Sensor Setting Description

Rain / light sensor has a reference amount of light reflected off the windshield in memory. The rain-sensing wiper system controls wiper operation based on change in amount of the reflected light. After performing any of the following service operations, the reference light amount value in sensor memory is cleared or changed, so the sensor must be initialized.

•Replacement of rain / light sensor
•Replacement of windshield

Initialization (When Rain / Light Sensor Is Replaced)

1)Check that vehicle is in the following conditions.

•There is no dirt, dust or air bubbles on windshield mounting surface of rain / light sensor.
•Ignition mode is in “OFF”.
•Wiper and washer switch is OFF.
•Lighting switch is OFF.
•Wipers are at park positions.
•Temperature around rain / light sensor is 5 to 40 °C (41 to 120 °F).
•Vehicle is stopped.
•Adjustment knob (1) is as shown in figure.

2)Set ignition “ON”.

3)Check that clearance lights are flashing at 1-second interval.

NOTE:

If clearance lights operate repeating a 3-second on, 1-second off cycle, rain / light sensor may be abnormal. Perform diagnosis in this case.

4)Change position of adjustment knob in sequence of 5 → 1 → 5 within 4 seconds.

[A]:

–

[B]:

5)Check that clearance lights flash at 0.5-second interval and that flashing stops within 10 seconds.

Initialization (When Only Windshield Is Replaced)

1)Check that vehicle is in the following conditions.

•Ignition mode is in “OFF”.
•Wiper and washer switch is OFF.
•Lighting switch is OFF.
•Wiper is in park positions.
•Temperature around rain / light sensor is 5 to 40 °C (41 to 120 °F).
•Vehicle is stopped.
•Adjustment knob (1) is as shown in figure.

2)Set ignition “ON” and wait for 3 seconds.

3)Change position of adjustment knob in sequence of 5 → 4 → 5 → 1 → 5 → 4 → 5 within 7 seconds.

[A]:

–

[B]:

4)Check that clearance lights flash at 1-second interval.
Repeat procedure beginning with Step 1) – 3) if clearance lights do not flash.

NOTE:

If clearance lights operate repeating a 3-second on, 1-second off cycle, rain / light sensor may be abnormal. Perform diagnosis in this case.

5)Change position of adjustment knob in sequence of 5 → 1 → 5 within 4 seconds.

[A]:

–

[B]:

6)Check that clearance lights flash at 0.5-second interval and that flashing stops within 10 seconds.