Mazda 1996 626, Service Manual

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WARNING SYSTEM
C2
Description
The warning lights and indicators are located in the instrument cluster and are controlled by their
respective switches and/or control modules. Most, but not all, of these warning lights and indicators are
grounded directly by their respective switch or control module.
System Operation
Cruise set indicator light
The cruise set indicator illuminates when the cruise control module applies ground to the cruise set
indicator light, alerting the driver that the cruise control is engaged.
ABS warning light
The ABS warning light illuminates when there may be a problem with the antilock brake system. This
warning light is controlled by the ABS control module.
Brake system warning light
The brake system warning light illuminates when the ignition switch is at START, the parking brake is
set, or the brake fluid level is low. When the ignition switch is at START, battery positive voltage is
applied to a transistor in the instrument cluster. This transistor is turned on by applying ground to the
brake system warning light, forcing the warning light to illuminate. When the parking brake is set, the
parking brake switch applies ground directly to the brake system warning light. When the brake fluid
level is low, the brake fluid level sensor closes and applies ground directly to the brake system warn­
ing light, causing the brake system warning light to illuminate.
Generator warning light
The generator warning light illuminates to warn the driver that the generator is not producing electrici­
ty. If the generator stops producing sufficient power, it grounds the generator warning light bulb via a
diode.
Seat belt warning light and alarm
The seat belt warning light illuminates after the ignition switch is turned to ON with the driver’s seat
belt unbuckled. The seat belt warning alarm sounds for 4 to 8 seconds after the ignition switch is
turned to ON with the driver’s seat belt unbuckled. The seat belt warning alarm is controlled by the
CPU.
Washer Fluid-level Warning Light (Canada)
The washer fluid-level warning light illuminates to warn the driver that the washer fluid level is low.
When the washer fluid level drops below a certain level, the float switch closes, applying ground to
the washer fluid-level warning light.
Oil pressure warning light
The oil pressure warning light illuminates to alert the driver of a low oil pressure condition. When the
oil pressure drops below a certain level, the oil pressure switch closes, applying ground to the oil
pressure warning light.
Door ajar warning light
The door ajar warning light illuminates to alert the driver that one or more of the vehicle doors is
open. When a door is opened, its door switch closes, grounding the door ajar warning light.
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