Steering Column (page 4 of 8)

STEERING

DESCRIPTION AND OPERATION

57-13

On vehicles without memory seats, inputs from the column adjustment switch are received by the adjustment control 
unit located under the column. The control unit interprets the signals from the switch and operates the requested 
adjustment motor in the required direction.

On vehicles with memory seats, the adjustment control unit is not fitted. Inputs from the column adjustment switch are 
received by the memory seat ECU which is incorporated into the driver's seat switch pack. The ECU interprets the 
signals from the switch and operates the requested adjustment motor in the required direction. The motors used on 
the memory vehicles have Hall effect sensors known as 'ripple counters'. These counters output the position of the 
column when the seat memory store function is used and applies this setting to the applicable ignition key.