Hyundai Tiburon 2003 Workshop Manual page 805

During start condition (IG1 on and IG2 off) washer input to be ignored. This is to prevent quality problem of
single wipe occurring during startingof car.
A. Time specification
T1 : 0.3 sec.
T2 : 0.6~0.8 sec.
(Time to complete current swipe only)
T3 : 0.2 - 0.6 sec.
B. Time specification
T1 : 0.3 sec.
T2 : 2.5~3.8 sec.
(Time to complete current swipe plus 2 swipes)
T3 : 0.6 sec. or more
3. Snow build up wiper bounce prevention (snow mode)
Without this feature, as snow builds up at the base of the windscreen, it becomes more difficult for the wiper
arms to completely reach the park position. Once the wipers have been turned off and the wipers have
returned to the park position, the compacted snow is able to drive the wiper arms back up and reactivate the
park switch. This, in turn, drives the wiper arms towardspark again and the cycle repeats itself.
This feature is required to prevent wiper bounce from happening when snow has accumulated on the
windscreen.
Detection of wiper bounce
If the BCM detects that the wipers have parked more than a maximum amount times within a time period then
wiper bounce is detected. The maximum amount of times can be set in EEPROM using the variable wipe
snow parks. The time can also be set in EEPROM using the variable wipe snow time. The units ofwipe snow
time is milliseconds.
Bounce prevention
If wiper bounce has been detected then the wiper bounce prevention relay is driven to open circuit. The wiper
bounce relay is in series with the park switch and thus can prevent automatic parking. This relay is normally
closed.
Termination of bounce prevention
Termination is achieved by ceasing to drive the wiper bounce relay to open circuit. Bounce prevention can be
terminated in the following ways:
A. Ignition off. The power source for the wiper motor is derived from IG2, thus there will be no drive to park
with ignition off. As such bounceprevention is not required.
B. The wiper stalk has moved from the OFF position.
4. Wiper motor stall protection
This feature offers some protection to the wiper motor if ice has frozen the wiper blades to the windscreen or
the wipers have jammed for some other reason. During low and high wiper selection, no protection is offered
sincethe stalk drives the wiper motor directly.
If the wiper motor has not parked within wipe stall time, then wiper motor is considered to have stalled. In this
case, the wiper bounce relayis driven to open circuit until either of the following events occurs:
A. The ignition has been switched to the off position.
B. The wipers have returned the park position by a manual operation (Low or high speed selected)
C. The wiper stalk has moved from the OFF position.
Wipe stall time can be set in EEPROM and it's units are 100ms.
During INT operation, if the time between initiating and concluding a wipe is greater than Wipe stall time then
the wiper motor is also considered to have stalled. In this case, the current wipe is terminated and INT
operationis cancelled until either of the following events occurs:
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24.04.2008