Hi Speed Wiper Operation

When the front wiper switch is in HI position, the BCM detects a high speed wiper ON signal by means of the BCM wiper switch reading function.

The BCM sends a front wiper request signal (HI) through the CAN communication lines

• from BCM terminals 39 and 40
• to IPDM E/R terminals 40 and 41.

When the IPDM E/R receives front wiper request signal (HI), it turns ON front wiper relay and front wiper high relay, located in IPDM E/R, power is supplied

• through IPDM E/R terminal 32
• to front wiper motor terminal 4.

Ground is supplied

• to front wiper motor terminal 2
• through grounds E9, E15 (all models) and E24 (with MR20DE).

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