The Rainsensing windshield wiper system is a wiper system that, in addition to providing normal wiper functions off, mist, manual low speed, manual high speed, and wash, provides automatic control of automatic int, automatic low,and automatic high speeds.
When the ignition key is in the ON position, the rainsensor will be activated.
MULTIFUNCTION SWITCH POSITION | RAINSENSOR OPERATING MODE | SENSOR ACTION |
MIST | MIST | Mist is controlled by the column switch. The sensor has no affect on this function. |
OFF | OFF | If not already parked, wiper motor moves with low speed until blades are in the depressed park position. |
AUTOMATIC Automatic mode has 5 sensitivity settings | AUTOMATIC | Automatic INT/speed control The sensitivity to raindrop accumulation on the windshield is set by the multifunction switch sensitivity adjustment. |
LOW SPEED | MANUAL | Wiper motor runs continuously in low speed, for example 45 wipes/minute. The sensor has no affect on this function. |
HI SPEED | MANUAL | Wiper motor moves continuously with high speed, for example 60 wipes/minute. The sensor has no affect on this function. |
WASHER When washer switch is turned on during 0.6 sec or more | WASHER | If washer switch is turned on during 0.6 sec or more, the wiper operate during 2.5~3.8 sec |
WASHER When washer switch is turned on during 0.6 sec or less | WASHER | If washer switch is turned on during 0.6 sec or less, the wiper operate only one time |
OFF MODE
With the wiper switch "OFF" and the ignition switch "ON", the rainsensor is considered to be in the "OFF" mode. In thismode, the sensor commands the wiper motor to be "OFF".
AUTOMATIC MODE
When the multifunction switch is moved to auto position and the ignition switch is in the run or accessory positions, the rainsensor is considered to be in "automatic" mode. Once a single "instant wipe" has occurred, the wipers remain at "innerwipe/park" until the rainsensor determines that the dwell time at that position is appropriate for the amount of precipitation on the windshield, rainsensor provides input to the wiper motor to activate the wipers to clear the precipitation fromthe windshield.
AUTOMATIC INT
For all automatic int. operations the rainsensor commands the wipers to operate in low speed for one wipe, followed by a variable dwell periodin the inner wipe position.
AUTOMATIC LOW
Automatic low speed operation is utilized when the amount of precipitation impinging on the windshield exceeds the automatic int to automatic low threshold. This threshold includes sufficient hysterisis to prevent cycling between automatic int and automatic low speed operation with a steady amount of precipitationaccumulation on the windshield.
AUTOMATIC HIGH
Automatic high speed operation utilized when the amount of precipitation impinging on the windshield exceeds the automatic low to automatic high threshold. This threshold includes sufficient hysterisis to prevent cycling between automatic low and automatic high speed operation with a steady amount of precipitationaccumulation on the windshield.
WASHER MODE
The rainsensor monitors the multifunction switch to determine if the washer function is selected. Rainsensor enables the wiper motor to run inlow speed during the wash mode and performs wipes from 2.5 to 3.8 sec.
MANUAL MODE
The rainsensor determines when a manual mode such as manual low, mist, off or manual high is selected. The column switch performs these modes andthe rain sensor has no affect.
FAULT A
Fault A is indicated when the sensor has detected that the sensor servo operating point is above the expected limits. This is an indication of damage to the windscreen in the area of the coupler or the sensor has been removedfrom the coupler.
FAULT B
Fault B is indicated when the sensor has detected that it no longer is responding to rain signals.
This is an indication of damage to the windscreen in the area of the coupler or, more likely, that the sensor has detected an electrical failurewithin the sensor.
ATTACHMENT GRADE VALUE
Attachment grade is used to determine when a fault in A is detected. The attachment grade value is set at 140. This allows the product to operatein all conditions other than the most severe damage the windscreen.
USE SENSITIVITY ADJUSTMENT TO INDICATE FAULT
A method to indicate detected faults is available to a service garage technician by using the sensitivity input and the wipers as an indicator.The service method is described as follows:
With ignition "ON", move the sensitivity adjustment to the high sensitivity setting.
Decrease the sensitivity by one setting.
If a wipe occurs, then Fault A has been detected and the service technician should assure that the coupler area on the windscreen is not damagedand the sensor is secured to the coupler.
Decrease the sensitivity one more setting.
If a wipe occurs, then Fault B has been detected and the sensor should be removed and replaced with a known good sensor.
When the ignition key is "ON" and the multifunction switch is in the auto position the wiper could operatein the following conditions.
Be careful not to touch the upper sensor front window glass.
Be careful not to scrub the upper sensor front window glass with a cloth.
Be careful not to vibrate the front window glass.
