Headlamp Power Wash

Headlamp power wash
Headlamp power wash activates when the following conditions are met:
^ Ignition switch in position II.
^ Headlamps switched on.
^ Front wash switch operated.
^ BCU counter allows headlamp power wash.

Operating the front washer switch with the headlamps switched on energises the IDM, supplying a voltage to the headlamp powerwash relay, which operates the headlamp powerwash pump and increments a counter within the BCU. This counter prevents the headlamp powerwash pump from operating every time the front washer switch is activated. Headlamp powerwash is only operational every third front wash cycle, providing the headlamps are on. The counter resets when the ignition switch is turned off.

When the BCU permits headlamp power wash operation, the pump motor operates only for 0.5 second.