Mitsubishi 3000GT - Wiper Linked with Washer; Low-Speed (and High-Speed) Wiper; Intermittent Wider; Auto Wiper Stop

CIRCUIT DIAGRAMS - Windshield Wiper and Washer Circuit 315
OPERATION
<Auto wiper stop>
/
L
<Low-speed (and high-speed) wiper>
l When the wipe: switch is placed in the OFF
l When the wiper switch is placed in the LO
position, the cam contacts of wiper motor causes
position with the ignition switch in the ACC or
current to flow through the auto wiper stop
ON position, wipers operate continuously at low
circuit, allowing the wiper blades to cycle before
speed.
they reach to the stop position.
l Placing the wiper switch in the HI position
causes the wipers to operate at high speed.
<Intermittent wiDer>
<Mist wiper>
l If the washer switch is on for 0.6 second or
less when the ignition switch is at ON or ACC
l If the wiper switch is turned to the INT position
with the wiper switch turned off, the washer
when the ignition switch is in the ON or ACC
liquid will not be poured but transistor will be
position, the voltage value from the intermittent
turned on to operate the wipers one time.
variable volume switch is input to intermittent
<Wiper linked with washer>
’
time detection circuit.
l The intermittent time detection circuit outputs
an H signal at the intermittent time according
to the set value of the intermittent variable
volume switch and, via OR, turns the Tr on
and off to operate the wiper.
l If the washer switch is on for 0.6 second or
more when the ignition switch is at ON or ACC
with the wiper switch turned off, the washer
liquid will be poured and the transistor will be
turned on 0.6 second later to operate the wipers
two or three times.
TROUBLESHOOTING HINTS
L
Phenomenon
Wipers do not operate Washer does not operate.
continuously
Washer operates.
Inspecting method
l Check the multi-purpose fuse No. 9
l Check the wiper motor. (Refer to GROUP
S-Windshield Wiper and Washer.)
l Check the column switch. (Refer to GROUP
S-Windshield Wiper and Washer.)
Low-speed (or high-speed) wiper operation only is l
inoperative.
Check the column switch. (Refer to GROUP
51-Windshield Wiper and Washer.)
Wipers do not operate intermittently.
(They operate continuously.)
l Check the wiper switch “INT” input signal. (Refer
to GROUP 51-Troubleshooting.)
l Check the column switch. (Refer to GROUP
S-Windshield Wiper and Washer.)
Wipers do not stop.
l Check the wiper switch “INT” input signal. (Refer
to GROUP 51-Troubleshooting.)
l Check the column switch. (Refer to GROUP
51-Windshield Wiper and Washer.)
o Check the wiper motor. (Refer to GROUP
51-Windshield Wiper and Washer.)
The intermittent time will not vary even if the variable l
intermittent wiper control switch is operated.
Check the variable intermittent wiper control switch
input signal. (Refer to GROUP S-Troubleshooting.)
l Check the column switch. (Refer to GROUP
51-Windshield Wiper and Washer.)
Even if the washer switch
The wipers linked with the l Check the washer motor. (Refer to GROUP
is on for 0.6 second or
washer operate.
51-Windshield Wiper and Washer.)
more,. the washer will not l Check the washer nozzle and washer tube.
operate.
The wipers linked with the l
Check the washer switch input signal.
washer do not operate.
l Check the washer switch. (Refer to GROUP
51-Windshield Wiper and Washer.)
1 TSB Revision