Lo Speed Wiper Operation
When the front wiper switch is in LO position, the BCM detects the low speed wiper ON signal by means of the BCM wiper switch reading function.
The BCM sends a front wiper request signal (LO) 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 (LO), it turns ON front wiper relay, located in IPDM E/R, power is supplied
- through IPDM E/R terminal 33 and front wiper high relay and front wiper relay
- to front wiper motor terminal 1.
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 low speed.