11.6.3 System Working Principle
11.6.3.1 System Working Principle
Front wiper system is directly controlled by the wiper / washer
switch. Front wiper motor wiring harness connector terminal
No.4 is the high-speed wiper input, terminal No.1 is the low-
speed wiper input. Different signals from the IF27 20A wiper /
wash switch power supply through wiper / washer switch to the
wiper motor input achieve different wiper speed.
The wiper / washer switch has a built-in integrated circuit, which
monitors the wiper motor return switch signal. Once the wiper
switch is off, the power from the IF27 20A wiper / wash switch
fuse is cut off. This IC can send output voltage through the
wiper / washer switch contact circuit to the front wiper motor
low-speed input terminal No.1, until the wiper arms are back to
the original position. Reset switch signals change and cut off
the voltage output, so the wiper arm reset is achieved.
The rear wiper system is controlled by the central controller.
The integrated rear wiper switch sends continuous and
intermittent wiper requests to the central controller. The central
controller controls the rear wiper relay pull-in to achieve rear
wiper control.
Front and rear washer pump is driven directly by the wash
switch. The switch built-in integrated circuit can monitor the
front washer pump signal, and after 2s continued washing the
rear wipers will be automatically enabled. The rear wiper
system is controlled by the central controller.
Body Electric
Wipers / Washers System
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