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BE -54
Automatic high speed operation utilized when the
amount of precipitation impinging on the windshield
exceeds the automatic low to automatic high thresh-
old. This threshold includes sufficient hysterisis to
prevent cycling between automatic low and auto-
matic high speed operation with a steady amount
of precipitation accumulation on the windshield.
6.
WASH MODE
The rainsensor monitors the multifunction switch to
determine if the wash function is selected. Rain-
sensor enables the wiper motor to run in low speed
during the wash mode and performs wipes from 2.5
to 3.8 sec.
7.
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
and the rain sensor has no affect.
REPLACEMENT
The rainsensor module is mounted to the optocoupler
using two snap fit stainless steel clips.
This allows the rainsensor module to be easily removed
and replaced in the event of a rainsensor module failure.
If the windshield
req~ires
replacement, the existing
rainsensor module may be unsnapped from the original
windshield and reinstalled onto the new windshield. It is
snap-fit to the new optocoupler, an integral portion of the
replacement windshield as delivered by the replacement
windshield manufacturer.
TROUBLESHOOTING
The rainsensor has two levels of fault detection as
described below:
1.
FAULTA
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 removed from the coupler.
2.
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 failure within the
sensor.
BODY ELECTRICAL SYSTEM
3.
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 operate in all
conditions other than the most severe damage the
windscreen.
4.
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 adjust-
ment to the high sensitivity setting.
(\ } Decrease the sensitivity by one setting.
e
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
damaged and the sensor is secured to the
coupler.
e
Decrease the sensitivity one more setting.
.. If a wipe occurs, then Fault B has been de-
tected and the sensor should be removed and
replaced with a known good sensor.
CAUTION
When the ignition key is "ON" and the multifunction
switch is in the auto position the wiper could operate
in 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.
e
Be careful not to vibrate the front window glass.
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Table of Contents
Troubleshooting
