Description - electric seats

SEATS

76-5-4

DESCRIPTION AND OPERATION

Description - electric seats

General
All markets use the same electric seat system. Electically operated lumbar support is optional. The system consists 
of an electrical sub-system and a mechanical sub-system.

The electrical sub-system consists of the following components:

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BCU.

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Seat power relays.

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Seat switch packs.

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Seat fore/ aft motors.

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Seat cushion front up/ down motors.

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Seat cushion rear up/ down motors.

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Seat squab motor.

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Lumbar pump.

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Lumbar deflate solenoid.

The mechanical sub-system consist of the following components:

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Gear wheels.

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Rack and pinion assemblies.

Seat power relay

Located beneath the seat, the seat power relay supplies battery voltage to the satellite fuse box. Operation of the 
relays is controlled by the BCU.

Voltage to the seat power relays is from fuse 5 in the engine compartment fuse box. The BCU controls the earth for 
the relay coils. Operating the seat power relays provides voltage to the satellite fuse box under each seat.

Satellite fuse box
Located beneath the seat, the satellite fuse box provides circuit protection for  the wiring to the seat switches and 
motors. It also protects the lumbar inflate and deflate circuits.

The seat power relay provides voltage directly to the 40A fuse in the satellite fuse box. Voltage from this fuse feeds 
the seat switch pack. The 3A fuses in the satellite fuse box protect the wiring to the lumbar pump and lumbar deflate 
solenoid. Voltage to the 3A fuses comes from the seat switch pack.