Manual Seats

Manual seats are adjustable vertically and horizontally, vertical adjustment being motorized but horizontal adjustment manually effected. The seats have heated cushions and squab, but are not operated by an electronic control module. Control is effected using three relays, two for vertical adjustment and one for heating.

Vertical adjustment is requested by operation of a switch located on the left-hand side of the seat front which completes the electrical supply to either the raise or lower relay as required. When either relay is energized a change of contact state connects one side of the motor to +12 V and the other side to ground. Reverse operation reverses supply and ground connection.

Heating is still controlled by a timed output from the Body Processor Unit (BPU). Operation of a switch located on the center console indicates to BPU that heating is required. Battery voltage is then applied to the heater relay for 11 minutes. The relay contact completes the heater circuit, providing seat heating (and illuminating the switch surround) until the timer expires, or optimum seat temperature is achieved. Operation of the heater switch before 'time-out' is achieved cancels the heating request. Operation of the heater switch after 'time-our has been achieved re-starts the heating cycle.