Starting Glow Plug ECU

Starting Glow Plug ECU

When the glow plug ECU (C0190) receives an ignition feed via fuse 14 of the passenger compartment fuse box (C0580), it provides a feed to the following:

Glow plug number 4 (C1039) on a YB wire Glow plug number 3 (C0478) on a YB wire Glow plug number 2 (C0477) on a YB wire Glow plug number 1 (C0476) on a YB wire The glow plug warning lamp (C0233) on a BY wire.

The glow plugs are connected in parallel, and are all earthed via their fixings. The glow plug ECU (C0190) is earthed on a B wire.

After a pre-determined time (or if the ignition switch is turned to the crank position) the glow plug ECU withdraws the feeds to the glow plugs. For more information, refer to the Starter Relay description later in this section.

Glow Plug Warning Lamp

The glow plug warning lamp (C0233) is located in the instrument pack, and is provided a feed by the glow plug ECU (C0190) on a BY wire when the ignition switch is turned to the 'ignition' position. The glow plug warning lamp (C0230) is earthed on a B wire. After a predetermined time (or if the ignition switch is turned to the crank position) the glow plug ECU withdraws the feed, extinguishing the warning lamp.

Starter Relay

When the ignition switch is turned to the 'crank' position, current flows across the switch (C1731 on LHD, C0090 on RHD) to the starter relay coil (C0151) on a WR wire. The earth path for the starter relay coil (C0151) is controlled as follows:

On vehicles with an anti-theft alarm system, the earth path is controlled by the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) on a BO wire. For more information, refer to the Anti-theft Alarm and Central Door Locking (CDL) section of this manual.  ANTI–THEFT ALARM AND CENTRAL DOOR LOCKING (CDL). On vehicles without an anti-theft alarm system fitted, the earth path is direct to earth on a B wire.