WW-6
FRONT WIPER AND WASHER SYSTEM
INTERMITTENT OPERATION
When front wiper switch is turned to INT position, wiper performs intermittent operation, low-speed operation,
and high-speed operation according to water drop increase rate on windshield detected by light and rain sen-
sor. If light and rain sensor malfunctions, it operates as vehicle speed sensing wiper during driving and oper-
ates intermittent operation according to INT-volume switch with vehicle stopped. During this time, BCM
controls each operation.
The BCM then sends a front wiper (HI or LOW) request signal with CAN communication.
lfrom BCM terminals 21 and 22
lto IPDM E/R terminals 39 and 40.
When the BCM determines that combination switch status is front wiper intermittent ON, it performs the follow-
ing operations.
lBCM detects intermittent wiper dial position.
lBCM sends front wiper request signal (HI or LOW) to IPDM E/R at calculated operation interval.
When IPDM E/R receives front wiper request signal (HI or LOW), it supplies ground to energize the front wiper
main relay and front wiper LOW/HIGH relay. It then sends an auto-stop signal to the BCM, and conducts inter-
mittent front wiper motor operation.
AUTO STOP OPERATION
When the wiper arms are not located at the base of the windshield, and the wiper switch is turned OFF, the
wiper motor will continue to operate until the wiper arms reach the windshield base. When the wiper arms
reach the base of windshield, front wiper motor terminals 2 and 5 are connected.
Ground is supplied
lto IPDM E/R terminal 43
lthrough front wiper motor terminal 5
lthrough front wiper motor terminal 2
lthrough grounds E21, E41 and E61.
The IPDM E/R sends an auto stop operation signal to the BCM with CAN communication.
When the BCM receives an auto stop operation signal, the BCM sends wiper stop signal to the IPDM E/R over
CAN communication lines. The IPDM E/R then de-energizes the front wiper main relay.
The wiper motor will then stop the wiper arms at the STOP position.
FRONT WASHER OPERATION
When the ignition switch is in the ON or START position, and the front washer switches are OFF, the front
washer motor is supplied power
lthrough 10A fuse [No. 15, located in fuse block (J/B)]
lthrough combination switch (wiper switch) terminal 2
lthrough combination switch (wiper switch) terminal 4
lto front washer motor terminal 1.
When the front wiper switch is in the front washer position, the BCM detects a front washer signal request
through the combination switch (wiper switch) reading function.
Combination switch ground is supplied
lto front washer motor terminal 2
lthrough combination switch (wiper switch) terminal 3
lthrough combination switch (wiper switch) terminal 9
lthrough grounds M21, M80 and M83.
With ground supplied, the front washer motor is operated in the front direction.
When the BCM detects that front washer motor has operated for 0.4 seconds or longer, the BCM uses CAN
communication and sends a wiper request signal to the IPDM E/R for low speed operation of wipers.
When the BCM detects that the washer switch is OFF, low speed operation cycles approximately 3 times and
then stops.
