Description and operation (Instruments Operation): Description and operation (page 6 of 9)

Trailer warning lamp The trailer warning lamp is connected from the instrument pack pin C0233-16 via header C0293 LHD/ C0292 RHD to pin C0661-1 on the BCU on an SK wire. This connection is part of the serial data bus between the instrument pack and the BCU.

The BCU and the Intelligent Driver Module (IDM) control the operation of the trailer warning lamp.

Refer to the direction indicators and hazard warning lamps section of this manual for details of operation.

Seat belt warning lamp (if fitted) The seat belt warning lamp is connected on an SK wire from the instrument pack pin C0233-16 via header C0293 LHD/ C0292 RHD to pin C0661-1 on the BCU. This connection is the serial data bus between the instrument pack and the BCU. The seat belt switch is connected to pin C0662-16 of the BCU on a RW wire. The seat belt switch is earthed on a B wire to earth header C0708 LHD/C0552 RHD.

The BCU controls the operation of the seat belt on warning lamp and an audible warning. The warning operates for a maximum of 6 seconds, after this time the BCU logic stops the warning output to the serial data bus.

The seat belt warning lamp is connected to the ignition supply from fuse 13 in the engine compartment fusebox. When the seat belt is fastened the seat belt switch is closed, and an earth path is completed from pin C0662-16 of the BCU on a RW wire to the closed contacts of the seat belt switch, to earth header C0708 LHD/C0552 RHD on a B wire.