Inertia Switch

Inertia Switch

Fuse 10 of the engine compartment fuse box (C0575) provides a constant battery feed to the inertia switch (C0123) on a G wire. The inertia switch is a normally closed switch. If the inertia switch hasn't been tripped, current flows across the switch (C0123) to the fuel pump relay located in the engine compartment fuse box (C0575) on a GU wire.

The inertia switch (C0123) also provides a feed to the Central Control Unit (CCU) (C0428) on a GU wire. For more information on the CCU, refer to the Control Units section of the Workshop manual, and the Anti-theft Alarm and Central Door Locking (CDL) section of this manual.  ANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL).

Fuel Pump Relay

The fuel pump relay coil receives a feed from the energised main relay. The earth path for the relay coil (C0575) is controlled by the ECM (C0913 on K Series vehicles, C0331 on KV6 NAS vehicles, C0371 on KV6 vehicles) on a BP wire. The ECM will energise the fuel pump relay when it receives an ignition feed from fuse 6 of the passenger compartment fuse box (C0581) on a W wire.

The energised fuel pump relay (C0572) provides a feed to the fuel pump (C0114) on a WP wire. The pump (C0114) is earthed on a B wire.