Windshield Wipers With Rain Sensor

Windshield Wipers with Rain Sensor

General Information and Components

• Rain/Light Recognition Sensor (G397)

• Wiper Motor Control Module (J400)

• Vehicle Electrical System Control Module (J519)

• Steering Column Electronic Systems Control Module (J527)

• Front Hood Switch (F266)

• Windshield Wiper/Washer Switch (E22)

Rain/Light Recognition Sensor General Information

The rain/light recognition sensor must be coded when a new windshield is installed.

It is not recommended to perform any windshield repairs near or around the rain/light recognition sensor.

It is not necessary to replace the rain/light recognition sensor if the windshield is being replaced.

If the windshield glass gets covered with dirt, insects, salt or heavy dew, the rain/light recognition sensor may interpret these as being rain drops and start the wipers. Car wax can also coat the windshield glass and interfere with the function of the rain/light recognition sensor.

The sensitivity of the rain sensor can be set using the interval levels.

• Interval 1 = lowest sensitivity

• Interval 4 = highest sensitivity

Functional Requirements

• Interval function turned on.

• The rain/light recognition sensor recognizes moisture on the windshield.

Function

• The Rain/Light Recognition Sensor (G397) measures how much of the windshield is covered with moisture.

• The Vehicle Electrical System Control Module (J519) (master control module) sends the information to the windshield wiper motor control module.

• The Windshield Wiper Motor Control Module (J400) then turns on the wiper motor and transmits the calculated wiper speed. 7 speeds are possible.

• The Vehicle Electrical System Control Module (J519) turns on the low beam headlamps if the vehicle has automatic headlamp control.

Service Information

Should the rain/light recognition sensor be faulty, then the windshield wiper will function as it does in interval wiping.

The rain/light recognition sensor must be coded in the vehicle electrical system control module.

It is not possible to deactivate the rain/light recognition sensor. The automatic headlamp control will stop working if the automatic headlamp control rain/light recognition sensor is disconnected and the windshield wipers will work as they normally do in the interval setting.

Opening the hood will immediately stop the windshield wipers. The vehicle electrical system control module reads the position of the hood directly from the front hood switch.