ABS Component Function:
• Speed sensors and tone rings on each wheel monitor
wheel rotation.
• Each speed sensor communicates wheel rotation puls-
es to the Electronic Control Unit.
• ECU receives the speed sensor inputs, interprets the
signal pulses, calculates speed and acceleration rates
of each wheel.
• Based on the speed sensor input, the ECU detects
impending wheel lock and operates the ABS
Modulator Valves required for proper control. The
Modulator Valves can be operated in the air, release
or hold modes to regulate air pressure to the brake
chambers.
• The braking force is applied at a level which mini-
mizes the stopping distances while maintaining as
much lateral stability as possible.
ABS Warning Light:
The ABS will perform a diagnostic indi-
cator lamp check and self diagnostic test
each time the ignition is switched to the on
position. The ABS dash indicator light will
illuminate momentarily (2.2 seconds) veri-
fying the self check test. If the ABS indica-
tor light remains on, or illuminates while
the motorhome is being operated, there is a
fault in the antilock brake system only. This
fault will not affect normal service braking.
The motorhome will need to go to a service
center to repair the problem.
ABS Blink Code:
The ABS dash indicator light can be
used to obtain system faults by displaying a
blink code.
To retrieve blink code(s)
• Turn ignition key to the
ON position.
• Using Systems
Diagnostic Center located
left of steering column
below dashboard, depress
Chassis Information
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WINDSOR
10•268
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