Operation

OPERATION

General

Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fusible link 4 and fusible link 12 of the engine compartment fuse box (C0632) on an R wire. Fusible link 12 (C0575) provides a constant battery feed to the lighting switch (C0041) on an RN wire. Fusible link 4 (C0574) provides a constant battery feed to fuse 14 of the passenger compartment fuse box (C0587) on an NW wire.

Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0028) to fuse 8 of the passenger compartment fuse box (C0588) on a G wire. Fuse 8 provides an ignition feed to the Central Control Unit (CCU) (C0593), which is mounted directly to the rear of the passenger compartment fuse box.

Central Control Unit (CCU)

The CCU monitors the condition of the door switches as follows:

The driver door switch (C0441) on a PS then PW wire. The front passenger door switch (C0441) on a PW wire. The LH rear passenger door switch (C0442) on a PW wire (5 door vehicles only). The RH rear passenger door switch (C0442) on a PW wire (5 door vehicles only).

NOTE: Both front door switches and both rear door switches have the same connector numbers as they utilise the same harness's.

All the above are normally open switches. If a door is opened, the switch contacts close and an earth path is created. When the CCU senses an earth path, it illuminates the interior lamp(s). All the above are earthed on B wires.

The CCU (C0428) also monitors the condition of the tail door switch (C0616) on a BO wire. When the tail door is opened, an earth path is created. The CCU will now illuminate the load space lamp (see 'Load Space Lamp').

For more information on CCU operation, refer to the Control Units section of the System Description and Operation Workshop manual.