Navigation System: Description and Operation

NAVIGATION SYSTEM

DESCRIPTION

General
The satellite navigation head unit is located in the centre console, and also incorporates a radio and a front loading single CD player. Some vehicles are also fitted with a CD autochanger.

The system operates when the ignition switch is turned to the 'auxiliary' position.

NOTE: The supporting circuit diagram shows the Navigation system fitted with optional Harmon Kardon speakers. A system fitted with standard speakers will not have a power amplifier or rear high range speakers fitted. The connector numbers applied to the high range speakers differ between the two speaker systems.

OPERATION

General
Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 4 of the engine compartment fuse box (C0632) on an R wire. Fusible link 4 (C0574) is connected to fuse 9 of the passenger compartment fuse box (C0587) by an NW wire. Fuse 9 (C0585) provides a constant battery feed to the following on P then PK wires:
- The head unit (C0921)
- The CD autochanger (C0941)
- The power amplifier (C0491).

Fusible link 1 is connected in series with fusible link 2, which is also located in the engine compartment fuse box. Fusible link 2 (C0571) is connected to the ignition switch (C0028) by an NR wire. When the ignition switch is turned to the 'auxiliary' position, current flows across the switch (C0028) to fuse 11 of the passenger compartment fuse box (C0588) on a PS wire. Fuse 11 (C0580) provides an auxiliary ignition feed to the head unit (C0921) and the remote interface unit (C1897) on LGW wires.

The head unit (C0921), CD autochanger (C0941), power amplifier (C0491), and the remote interface unit (C1897) are all earthed on B wires.