Mazda 1996 626, Service Manual

Page: 84 / 533

C2
WARNING SYSTEM
Fuel-level warning light
The fuel-level warning light illuminates to alert the driver of a low fuel condition. As the fuel level
drops, the resistance of the fuel sender decreases. The sender is tied to the fuel-level warning light
and the fuel gauge within the instrument cluster. When the sender resistance drops below a certain
resistance, the fuel-level warning light applies power to the fuel-level warning light.
Ignition key reminder alarm
The ignition key reminder alarm sounds to alert the driver that the ignition key is in the ignition key
cylinder when one of the doors is opened. When the ignition switch is at LOCK or ACC, battery posi­
tive voltage is applied to the CPU via the key in the ignition switch. When one of the doors is opened,
ground is applied to the CPU via the door switch. When the CPU receives these signals, it sounds
the ignition key reminder alarm.
Lights-on reminder alarm
The lights-on reminder alarm sounds to alert the driver that the vehicle lights are on when one of the
doors is opened. When the ignition switch is at LOCK or ACC, battery positive voltage is removed
from the CPU ignition input. When the light switch is left in the headlight position, battery positive volt­
age is applied to the CPU via the light switch. When the CPU receives these signals, it sounds the
lights-on reminder alarm.
C 2 -8