Overspeed Warning informs the driver if the vehicle is travelling at speeds in excess of 120 kph (75 mph) by illuminating a warning lamp located in the instrument pack. The system is controlled by the overspeed ECU, which is located adjacent the passenger compartment fuse box.
NOTE: Overspeed warning is only fitted to Gulf Market Specification vehicles.
Operation
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 5 of the under seat fuse box (C0632) on an N wire. Fusible link 5 (C0570) is connected to the ignition switch (C1043) by an NW wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C1732) to fuse 15 of the passenger compartment fuse box (C0580) on a W wire. Fuse 15 (C0580) provides an ignition feed to the overspeed ECU (C1311) on a WG wire. The ECU (C1311) is earthed on a B wire.
Road Speed
The speed transducer (C0195) provides a pulsed road speed signal to the instrument pack (C1060) on a BR wire. The transducer is located within the transfer box, and provides 4100 voltage pulses per mile. The instrument pack (C1060) doubles the frequency of the pulses and provides this signal to the overspeed ECU (C1311) on a YK wire.
Warning Lamp
If road speed reaches 123.5 kph (77 mph), the overspeed ECU (C1311) illuminates the warning lamp located in the instrument pack (C0236) by providing a feed on a BK wire. The bulb will remain illuminated until road speed drops to 117.5 kph (73 mph).