Operation

OPERATION

Power Distribution

Feed from the positive battery terminal (C0192) is supplied to fuse 25 and fuse 53 of the passenger compartment fuse box (C0632) on an R wire. Fuse 53 (C0583) is connected to the ignition switch (C0028) by an RU wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0028) to fuse 5 of the passenger compartment fuse box (C0585) on a G wire. Fuse 5 (C0587) provides an ignition feed to the alternator (C0053) on a GW wire.

Fuse 25 of the passenger compartment fuse box (C0583) is connected to the ignition switch (C0028) by an R wire. When the ignition switch is turned to the 'crank' position, current flows across the switch (C0028) to the Engine Control Module (ECM) (C0331) on a BY wire, and the ignition coil relay (C2089) on a G then GN wire.

Starting Starter Motor

The starter motor solenoid (C0178) is provided a constant battery feed from the battery (C0192) on an R wire. If all parameters for starting have been met, the ECM (C0331) provides a feed to the automatic transmission interlock relay (C1455) on a YN wire. If the gear selector lever is in 'Park' or 'Neutral', the interlock relay (C1455) provides a feed to the starter solenoid (C0179) on a B then BY wire. The energised starter solenoid allows the battery feed to power the starter motor.

The starter motor (C0179) also provides an 'engine start' signal back to the ECM (C0606) on a BG wire.

Ignition Coils

The ignition coil relay (C2089) receives an 'engine crank' feed from the ignition switch (C0028) on a GN wire. The relay coil (C2089) is earthed on an N wire. The energised ignition coil relay (C2089) provides a feed to the following on G wires:

Ignition coil 1 (C0156). Ignition coil 2 (C0052). Ignition coil 3 (C0276). Ignition coil 4 (C1770). Ignition coil 5 (C1771). Ignition coil 6 (C1772). Ignition coil 7 (C2087). Ignition coil 8 (C2088).

Fuel Pump

When the engine is started, the ECM (C0331) provides an earth path for the fuel pump relay coil (C2022) on a BP wire. The energised fuel pump relay (C2020) provides a feed to the fuel pump (C0114) on a WU wire. The fuel pump (C0114) is earthed on an N wire.