9000 Aero L4-2290cc 2.3L DOHC Turbo EFI HO (1997)
Oil Pressure Warning Lamp/Indicator: Description and Operation
Certain parts of the car's lighting system are monitored by two filament monitors, 228a and 228b, and pictogram 213.
The five lamps f, g, d, e and j in the pictogram are covered individually in the Pictogram - Door Indication.
Filament Monitors
Filament monitor 228b monitors headlamp main and dipped beams and filament monitor 228a monitors rear lights and brake lights.
Filament monitor 228b incorporates relays which act on the pictogram and light lamp c if a failure occurs while filament monitor 228a
incorporates shunt resistors which act on the pictogram and light lamp b if a failure occurs.
The lamp in the centre, a (central warning lamp), lights up the car's outline on the pictogram and always comes on when a failure is detected.
When ignition switch 20 is in the Drive position, current is supplied to pictogram terminal 5.
Front Filament Monitor 228b
If there is a fault in any lighting circuit, an imbalance arises and the relay is activated. Terminal C2 in the filament monitor and lamps C and A
(central warning lamp) in the pictogram are grounded and the lamps light up.
Rear Filament Monitor 228a
The filament monitor senses if the current to one of the lamps is incorrect. Terminal C1 in the filament monitor and lamps b and a (central warning
lamp) in the pictogram are grounded and the lamps light up.
The filament monitor incorporates a circuit for monitoring brake lights switch 29 and the high-level brake light, refer to Brake Lights.
Oil Pressure Warning Lamp 47d
The oil pressure warning lamp shows the driver if the engine oil pressure drops too low.
If the oil pressure drops below 0.3-0.5 bar, the oil pressure sensor closes and lamp 47d lights up.
The pictogram's central warning lamp is also grounded and the pictogram lights up.
Airbag Warning Lamp 47t
The airbag warning lamp shows the driver if there is a fault in the airbag system.
