Mazda 2007 CX-9, Service Highlights

Page: 507 / 614

WIPER/WASHER SYSTEM
09-19–13
09-19
Fail-Safe Function
•
When a rain sensor malfunction or a communication error between the rain sensor and auto light/wiper control
module is detected, the auto light/wiper control module initiates controls as indicated in the fail safe function
table.
Fail-Safe Function Table
End Of Sie
RAIN SENSOR FUNCTION
id091900101400
Rainfall detection function
•
The LED in the rain sensor emits infrared light which is reflected off the windshield via the lens sensor and then
received by the photodiode in the rain sensor. If the rate of reflected infrared light is reduced, it is determined
that rain is contacting the windshield and the intensity of the rainfall is calculated from the amount of reflection
rate reduction.
•
If the rain sensor detects rainfall and then detects no change in the detected amount after the wipers have been
operated two times, the windshield is determined to be dirty and windshield wiper operation is stopped.
—
If the windshield is dirty, turn the wiper and washer switch to the 1 or 2 position to operate the windshield
wipers. Or, remove dirt from the windshield before operating the auto wiper.
•
When the temperature sensor inside the rain sensor detects approx. -10
°
C {14
°
F} or less when the vehicle
speed is 0 km/h {0 mph} , the windshield wipers do not operate.
Sensitivity Adjustment Function
•
By changing the sensitivity adjustment volume, installed on the wiper and washer switch, the sensitivity of the
rain sensor can be freely adjusted.
Initial Setting Function
•
When the ignition switch is turned to the ON position after replacing the rain sensor with a new one, the initial
setting is stored after verifying the windshield condition.
Note
•
The optional rain sensor re-initialization can be performed using the specified procedure.
—
For the re-initialization method, refer to the Workshop Manual. (See CX-9 Workshop Manual.)
On-board Diagnostic Function
•
If there is any malfunction in the rain sensor, the auto light/wiper control module is informed of the malfunction
and a DTC is detected.
End Of Sie
Malfunctions
Fail-safe function
Recovery items
Before operation After operation
•
Rain sensor error
•
Rain sensor communication
error
High speed operation
Maintains high speed
operation
•
Ignition switch lock position
•
When a rain sensor malfunction is
cleared
•
When communication is restored
•
When the wiper and washer switch is
in a position other than AUTO
Low speed operation
Maintains low speed
operation
Intermittent operation
Intermittent operation
according to the
sensitivity setting
Off Maintains turn-off
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