Page 665 of 1336
8710-01
Abnormal wiper parking signal stop (GND)
The wiper system sends the corresponding signal of current status with IGN ON and wiper AUTO
switch ON. (The wiper motor is operated only when the request signal from the rain sensor is
received.) A. Operation 1. (When the wiper motor parking signal stopped at GND)
Abnormal wiper parking signal stop (IGN)
The wiper system sends the corresponding signal of current status for 2 seconds (T2) with IGN ON
and wiper AUTO switch ON.
After the 2 seconds (T2), the system outputs the signal of the stopped status.
(The wiper motor is operated only when the request signal from the rain sensor is received.) A.
B. Operation 1. (When the wiper motor parking signal stopped at ING)
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Operating process
- IGN ON/Wiper AUTO switch ON/Wiper motor in parking position
Page 667 of 1336
8710-01
Rain sensor malfunction (rain sensor external malfunction)
The wiper LO relay is operated once (T1). A.
B. Operation 1.
("rain sensor installed improperly" signal received from the rain sensor)
Basic conditionsIGN ON and wiper AUTO switch in ON position
Page 668 of 1336
Rain sensor malfunction (no rain sensor signal)
The wiper LO relay is operated once (T1). A.
B. Operation 1.
("no signal detected" signal received from the rain sensor)
Basic conditionsIGN ON and AUTO switch ON
Page 669 of 1336
8710-01
Operating process
- IGN ON/Wiper AUTO switch ON
Page 670 of 1336
Speed sensitive AUTO wiper
The speed sensitive AUTO wiper is operated as follows for the vehicles without rain sensor or the
vehicles without rain sensor coupled wiper operation because of faulty rain sensor.
Intermittent wiper operation by the values from vehicle speed and speed level of the wiper speed
control. -
Speed sensitivity AUTO switch rest time
AUTO switch level
Level Resistance Remarks
0%
FAST
25%
50%
75%
100%SLOW
There are HYSTERISIS ranges between the
levels.
The wiper remains activated for the time remaining when the AUTO switch is turned OFF during the
speed sensitive wiper operation.
The intermittent operation is reactivated when the AUTO switch is turned ON with IGN ON.
The intermittent operation is reactivated when the AUTO switch is turned ON with IGN ON. -
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Page 671 of 1336

8710-01
Wiper troubleshooting
The wiper does not cycle one time when turning the multi-function wiper
switch from OFF to AUTO position or when starting the engine with the multi-
function wiper switch in AUTO position. Symptom 1.
When starting the engine with the multi-function wiper switch in AUTO position, the wiper always
cycles one time to remind the driver of system in AUTO mode.
This wiper operation is performed only for the first time when turning the multi-function wiper switch
from OFF to AUTO position with IGN ON. If the switch is turned from OFF to AUTO again after
that, the wiper is operated only when raining to prevent the wiper blade from wearing. 1.
2.
It rains but the wiper does not work with the wiper switch in AUTO position. Symptom 2.
Check if the multi-function wiper switch is in AUTO position.
Check the power to the rain sensor. That is, check the pin no. 3 (GND) and pin no. 4 (IGN).
Check that the wiper relay is intact. 1.
2.
3.
The wiper operates 3 or 4 times with high speed abruptly. Symptom 3.
Check if the wiper speed control switch is set to the fast side.
The fast stage has the highest sensitivity and is very sensitive to the small change of amount of rain
drops. Therefore, adjust the knob to lower the sensitivity level.
The wiper continues work even if the windshield glass is dry. Symptom 4.
Check the wiper blade for wear. If the wiper blade cannot wipe the glass uniformly and clearly, this
problem could occur. In this case, replace the wiper blade with a new one.
Check if the wiper speed control switch is set to the fast side. 1.
2.
The fast stage has the highest sensitivity and is very sensitive to the small change of amount of rain
drops. Therefore, adjust the knob to lower the sensitivity level.
The overall wiper response is too fast or slow. Symptom 5.
Check if the wiper speed control switch is set to the fast or slow side.
Notify that the user can select the sensitivity by selecting the variable resistance value. And, select a
proper stage.The wiper also cycles one time when the multi-function wiper switch is turned from OFF to AUTO
position during 5 minutes after the rain stops.
Page 672 of 1336
Wiper LO/HI control
When front or rear washer signal is input during the wiper LO/HI operation, the front or rear washer
motor is activated.
The AUTO washer input is overridden during wiper LO/HI operation. A.
B. Operation 1.
When the signal from the wiper LO/HI switch is received, the wiper LO/HI relay is turned ON/OFF.
(The wiper LO relay is always activated when the HI relay is activated.)
If the ignition turned OFF while the wiper is operated, the wiper stops operating when the wiper
motor parking signal is input.
If no wiper motor parking signal is input during the wiper LO/HI operation, the wiper relay continues
working. (If no wiper parking signal is input for 3 seconds of wiper AUTO operation, wiper relay is
deactivated after 5 seconds - failure notification)
When the ignition is turned OFF during the wiper HI operation, the wiper is operated in LO mod and
then returns to the parking position. -
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