Hi Speed Wiper Operation

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

from BCM (input 2) terminal 49
to combination switch terminal 2, and
to 20A fuse (No. 39, located in the IPDM E/R).

When the ignition switch is the ON or START position, and the front wiper switch is turned to HI position, front wiper HI contact in combination switch comes ON, and Power is supplied

through combination switch terminal 10
to BCM (output 3) terminal 41.

When BCM determines that wiper switch is in HI position, it uses CAN communications and Front wiper request signal (HI) is sent to IPDM E/R

from BCM terminals 70 and 71
to IPDM E/R terminals 48 and 49.

When the IPDM E/R receives front wiper request signal (HI), it energizes the front wiper relay and front wiper HI relay. Under this condition, Power is then supplied

from 20A fuse (No. 39, located in the IPDM E/R)
through front wiper relay (located in the IPDM E/R)
through front wiper HI relay (located in the IPDM E/R)
to IPDM E/R terminal 30
to front wiper motor terminal H.

Ground is supplied

to front wiper motor terminal E, and
to IPDM E/R terminal 14 (and to front wiper relay and front wiper hi relay)
through body grounds E15 and E24.

With power and ground supplied, the front wiper motor operates at high speed.