Immobilisation Warning Lamp

Immobilisation Warning Lamp

Fuse 30 of the passenger compartment fuse box (C0595) provides a constant battery feed to the immobilisation warning lamp (C1061) on a PN wire. The anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) also provides a feed to the warning lamp (C0233) on an O wire. As the potential difference across the bulb is 0 V, the lamp remains extinguished. To illuminate the lamp, the anti-theft alarm ECU withdraws the feed on the O wire and provides an earth path. By switching the feed/earth on and off, the immobilisation ECU can control the flashing sequence of the warning lamp.

Starter Relay

The starter relay coil (C0151) receives an 'engine crank' feed from the ignition switch (C1731 on LHD, C0090 on RHD) on a WR wire. When the vehicle is immobilised, the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) provides a feed to the other side of the relay coil (C0151) on a BO wire. When the anti-theft alarm ECU receives a valid re-mobilisation signal, it replaces the feed to the starter relay coil on the BO wire with an earth path. The energised starter relay is now able to provide a feed to either the starter motor (C0179) on an NR wire (Td5) or the immobilisation ECU (C0059) on an NR then B wire (300 Tdi).

For more details on starting, refer to the Starting and Charging – Td5 or Starting and Charging – 300 Tdi sections of this manual.  STARTING AND CHARGING – Td5.  STARTING AND CHARGING – 300 Tdi.