Rear Wipe/Wash System

When the rear wiper switch is activated, the rear wiper relay output is pulled low, energizing the relay, switching the motor on.

The BC1 receives a low signal (switched to ground) when the wiper is parked. Time between park events is monitored to detect stalling or freezing of the mechanism.

The wiper motor relay is energized until the wiper has completed three wipes (counted by monitoring the rear park switch). Once this continuous phase has finished, the wiper switches to intermittent operation as follows:

• If the front wipers are on intermittent (AIC not fitted), slow or fast: The ratio of front wipes to rear wipes is 3:1 with rear wiper start synchronized with the front wiper start.
• If front wipers are off or on intermittent (AIC fitted), then one wipe for every 10 ± 1 sec after start of previous rear wipe cycle will apply.

The BC1 monitors the park contact within the rear motor and will deactivate the relay if the signal is not received within 5 seconds of activating the relay - this prevents damage to the motor in the event of the wiper jamming.

The rear wiper system is disabled with the tailgate open. The BC1 looks at the tailgate position switch after receiving a request for rear wiper activation and delays the request if the tailgate is open. Turning the rear wiper switch off then back on will over-ride the tailgate position. Rear wiper operation is also possible at speeds above 6km/h regardless of tailgate position.

Notes: