1989-Montero · wiper washer system · страница 8 из 19 · Открыть оригинал PDF ↗
WINDSHIELD WIPERS AND WASHER
OPERATION
Wiper Operation
l When the wiper switch is at “ON” with the
ignition switch at either “ACC” or “ON”, cur-
rent flows through fuse No. 9, rear wiper
motor, rear wiper switch and ground; the
wiper operate.
Wiper Low-speed and High-speed Operation
l When the front wiper switch is at “LO” with
the ignition switch at either “ACC” or “ON”,
current flows through fuse No. 8, front wiper
motor (low-speed brush), front wiper switch
and ground; the wipers operate at low speed.
l When the front wiper switch is at “HI”. cur-
rent flows through fuse NO. 8. front wiper
motor (high-speed brush), front wiper switch,
and ground; the wipers operate at high speed.
Wiper Automatic Stopping Operation
l When the front wiper switch is set at “OFF”
to stop the wipers, current flows through the
front wiper motor (low-speed brush), front wip-
er switch, intermittent wiper control relay (con-
tacts), front wiper motor (cam contacts), and
ground, causing the front wiper motor to con-
tinue operation unit1 the wiper bleades return
to their park positions.
l Once the wiper blades have reached park
positions. the front wiper motor cam moves to
open its contacts. This interrupts flow of cur-
rent to ground, and the front wiper motor
stops.
Wiper Intermittent operation
l With the ignition switch at “ACC” or “ON”,
battery voltage is applied to the intermittent
wiper control relay through fuse No. 8.
l When the front wiper switch is at “INT”,
current flows through the intermittent wiper
control relay, front wiper switch, and ground,
and the intermittent wiper control relay internal
contacts close and open repeatedly.
l While the contacts are ciosed, current flows
~ through the front wiper motor (low-speed
brush), front wiper switch, intermittent wiper
control relay (contacts), and ground, causing
the front wiper motor to operate.
Wiper Operation Coordinated with Washer
o With the ignition key at the “ACC” or “ON”
position, voltage is supplied, through fuse No.
8 and the front washer motor, to the front
washer switch.
l When the front washer switch is switched
ON, current flows to fuse No.8, the front
washer motor, the front washer switch, and
ground, and, at the same time that the front
washer operates, the intermittent wiper con-
trol relay is switched ON, and current flows to
fuse No. 8, the front wiper motor (low-speed
brushes), the front wiper switch, the intermit-
tent wiper control relay, and ground, and the
front wiper motor is activated.
TROUBLESHOOTING HINTS
1. Wipers do not operate
(1) Washer also does not operate
e Check fuse.
l Check for ground connection.
2. Wipers do not operate at low speed (or high
speed)
l Check front wiper switch.
3. Wipers do not operate in intermittent mode
l Check intermittent wiper control relay ter-
minal voltage with relay energized.
| Check location | |
|---|---|
| Front wiper switch | |
| Intermittent wiper control relay | |
| 12V reoeatedtv | - (Normal) |
Таблица в оригинале
4. Wipers fail to stop
l Check front wiper motor.
5. Wipers do not operate coordinated with
washer
l Check intermittent wiper control relay.
l When the front wiper motor starts operating,
the relay internal contacts open, causing cur-
rent to flow through the front wiper motor
(cam contacts), and ground. This keeps the
front wiper motor operating until the wiper
blades return to their park positions.
l Once the wiper blades have reached park
positions, the front wiper motor cam moves to
open its contacts. This interrupts flow of cur-
rent to ground so the front wiper motor stops.
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