Wiper And Washer System (W/ Rain Sensor) Rain Sensor Circuit

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Wiper Washer. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIPER

CHECK WIPER OPERATION

CHECK WINDSHIELD WIPER SWITCH

CHECK OPERATION OF WIPER

CHECK WIPER RUBBER

READ VALUE USING INTELLIGENT TESTER (COMBINATION SWITCH)

CHECK RAIN SENSOR

READ VALUE USING INTELLIGENT TESTER (RAIN SENSOR)

CHECK RAIN SENSOR

CHECK RAIN SENSOR

WIPER AND WASHER SYSTEM (w/ Rain Sensor) - Rain Sensor Circuit


DESCRIPTION

The auto wiper system adjusts the wiper speed to the optimum speed based on the amount of rain. The rain sensor mounted on the windshield detects rainfall. This system operates when the windshield wiper switch is set to AUTO. The rain sensor sensitivity can be adjusted with the rain sensor adjusting switch. Signals are sent to the windshield wiper ECU from the windshield wiper switch through the CAN line, and from the rains sensor through the LIN line. Based on these signals, the windshield wiper ECU operates the wiper and determines its operation speed.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Wiper Washer.Wiper And Washer System (W/ Rain Sensor).Wiper And Washer System (W/ Rain Sensor) Rain Sensor Circuit


INSPECTION PROCEDURE

1.CHECK WIPER

  1. Check the symptoms of the wiper. Check if the causes of the symptoms are any of the following conditions shown in the charts.

    It is Raining but Wiper does not Operate
    Condition
    		Note
    Windshield wiper switch in position other than AUTO
    		Wiper only operates at AUTO setting
    Rain sensor temperature is -10°C (14°F) or less, or 70°C (158°F) or higher
    1. To prevent improper operation, wiper does not operate when rain sensor temperature is -10°C (14°F) or less
    2. To prevent damage to rain sensor, wiper does not operate when outside temperature is 70°C (158°F) or more, or when interior temperature of sensor is 90°C (194°F) or more
    It is drizzling, or there is scattered rain
    		If rain droplets do not contact rain sensor, or rain droplets are very small, they are not detected

It is not Raining but Wiper Operates
Condition
Note
Condensation on windshield
Wiper may operate if condensation occurs in rain sensor detection area. If condensation recurs after rain sensor detection area is wiped, wiper operation may continue.
Sun rays are strong
If sudden changes in light intensity occur, wiper may operate
Sudden temperature changes
If sudden changes in temperature occur (A/C heater is used in winter, etc.), wiper may operate
Object is contacting rain sensor
If inner mirror contacts or strikes rain sensor, wiper may operate
Windshield wiper switch off by AUTO
Wiper operates 1 time after windshield wiper switch is turned off by AUTO

Wiper Operation is Irregular
Condition
Note
  1. Wiper blade is deteriorated
  2. Windshield surface is oily
Rain sensor detects rain amount when wipers are operating. When rain is not completely wiped off by wipers, decrease in ability to detect amount of rain occurs.
  1. During scattered rain
  2. Heavy rain with large droplets
  1. During scattered rain or when rain droplets are large, rain droplets contact the sensor intermittently, causing wiper operation to be irregular
  2. During heavy rain, it is difficult for sensor to learn "no rain" condition, causing wiper operation to be irregular
Wiper volume is set to minimum
Minimum wiper volume setting is designed to be non-sensitive (for users who prefer non-sensitive operation), resulting in irregular wiper operation
Problem with wiper motor position signal
When wiper motor position signal has chattering, wiper may operate excessively. During auto wiper operation inspection, if wiper operates several times, and replacement of rain sensor does not correct problem, wiper motor may be malfunctioning.
OK:
Causes of symptoms are one or more of above conditions


NG
Go to step 2
OK

END

2.CHECK WIPER OPERATION

  1. Set the windshield wiper switch to the LO and HI setting, and check that the wipers operate normally.

    OK:
    Wipers operate normally


NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)
OK


3.CHECK WINDSHIELD WIPER SWITCH

  1. Set the windshield wiper switch to AUTO, and check the problem symptom.

    Result
    Result
    		Proceed to
    It is raining but wiper does not operate
    		A
    It is not raining but wiper operates
    		B


B
Go to step 10
A


4.CHECK OPERATION OF WIPER

  1. Check operation of the wipers.

    Result
    Result
    		Proceed to
    Wiper does not operate normally
    		A
    It is raining but wiper does not operate
    		B


B
Go to step 10
A


5.CHECK WIPER RUBBER

  1. Activate the washer and check the wiping ability of the wiper.

    OK:
    No residue after wipe


NG
REPLACE WIPER RUBBER (Click here)
OK


6.READ VALUE USING INTELLIGENT TESTER (COMBINATION SWITCH)

  1. Check the Data List for proper functioning of the combination switch.

    Combination Switch:
    Tester Display
    		Measurement Item / Range
    		Normal Condition
    		Diagnostic Note
    F Wiper AUTO Switch
    		Front wiper AUTO switch / ON or OFF
    		ON: Front wiper switch in AUTO position
    OFF: Wiper switch not in AUTO position
    		-
    OK:
    Windshield wiper switch operates.


NG
REPLACE WINDSHIELD WIPER SWITCH (Click here)
OK


7.CHECK RAIN SENSOR

  1. Check that the rain sensor is installed properly.

    OK:
    When viewed from outside of vehicle, rain sensor tape is not peeling and has no air bubbles or dust on it, and sensor has not come off bracket


NG
REPLACE RAIN SENSOR TAPE (Click here)
OK


8.READ VALUE USING INTELLIGENT TESTER (RAIN SENSOR)

  1. Check the Data List for proper functioning of the rain sensor.

    Rain Sensor
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Rain Sensor Cold
    		Rain sensor cold / COLD or OK
    		COLD: Front wiper switch in AUTO position
    OK: Wiper switch not in AUTO position
    		-
    Rain Sensor Hot
    		Rain sensor cold / HOT or OK
    		HOT: Front wiper switch in AUTO position
    OK: Wiper switch not in AUTO position
    		-
    OK:
    Rain sensor operates.


NG
REPLACE RAIN SENSOR (Click here)
OK


9.CHECK RAIN SENSOR


  1. Set the windshield wiper switch to AUTO. Flatten the end of a cotton swab soaked with water so that it is 4 to 6 mm (0.157 to 0.236 in.) wide. Touch the swab to the rain sensor detection area and check that the wiper LO operation occurs once.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Wiper Washer.Wiper And Washer System (W/ Rain Sensor).Wiper And Washer System (W/ Rain Sensor) Rain Sensor Circuit

    Result
    Result
    		Proceed to
    Wiper does not operate
    		A
    Wiper operates normally
    		B
    Any other operation
    		C


B
END

C
REPLACE WINDSHIELD WIPER ECU (Click here)
A

REPLACE RAIN SENSOR (Click here)

10.CHECK RAIN SENSOR

  1. Check that the rain sensor is installed properly.

    OK:
    When viewed from outside of vehicle, rain sensor tape is not peeling and has no air bubbles or dust on it, and sensor has not come off bracket


NG
REPLACE RAIN SENSOR TAPE (Click here)
OK

REPLACE RAIN SENSOR (Click here)