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2012 Trip
WARNING:
The ABS/ATC system is designed to
increase tire to road surface traction
but cannot overcome naturally
occurring laws of physics. The ABS/
ATC system, combined with safe
driving practices, will reduce the
possibility of wheel skid and loss of
lateral stability.
ABS Component Function:
Speed sensors and tone rings on each
wheel monitor wheel rotation.
Each speed sensor communicates wheel
rotation pulses to the Electronic Control
Unit.
The ECU receives the speed sensor
signal pulses to calculate 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
are operated in the
Air, Release or Hold
modes to regulate air
pressure to the brake
chambers.
Braking force is applied at a level
which minimizes the stopping distance
while maintaining as much lateral
stability as possible.
ABS Warning Light:
The ABS will perform a dash indicator lamp
check and self-diagnostic test each time the
ignition is switched to the on position.
When the ignition is turned on, the
ABS indicator illuminates momentarily
(3 seconds) verifying the self-
diagnostic test. If the ABS indicator
light remains on, or illuminates while
the motorhome is being operated,
this indicates a fault in the anti-lock
brake system. This fault will not
affect normal service braking. The
motorhome will need to go to a service
center to repair the problem.
INFORMATION:
If a fault code occurs, call a Bendix
service locator at 1-800-247-2725 and
take the motorhome to the nearest
repair facility.
ABS Diagnostic
If the ABS light on the dash illuminates, it
indicates that a fault has occurred with the
Anti-Lock Brake System only. Normal braking
is not affected but the motorhome will need to
go to a service center. The service center can
retrieve ABS diagnostic fault codes.
Retrieving Codes Using ECU:
System configuration codes and fault codes
are displayed through the dash ABS warning
light as a series of blinked sequences. The
fault codes can be accessed by grounding
Terminal 18 in the X1 connector of the ABS
control module. The control module is located
on the ceiling of the roadside electrical bay.
On the back of the ECU locate the black X1
connector, pin 18.
NOTE:
This process will require two people.
Ground pin 18 by inserting a wire at the
rear of the connector. Pin 18 is located in the
bottom right corner (labeled ABS Warning).
NOTE:
System configuration codes are
sequences of six blinked digits while
fault codes are sequences of two
blinked digits. Refer to an authorized
Bendix service center for a list of blink
code sequences. If grounding out is not
done correctly for a specific readout,
stop then start the procedure again.
NOTE:
All blink codes are displayed by the
ABS warning light only.
The system is capable of performing several
diagnostic mode functions. After ignition on,
a two second delay must be observed prior to
grounding.
Active code retrieval:
ground 1 time.
Inactive code retrieval:
ground 2 times.
Clearing active codes:
ground 3 times.
System configuration check:
ground 4
times.
Dynamometer test mode:
ground 5 times.
Reconfigure ECU:
ground 7 times.
NOTE:
Reconfigure Mode is entered by
grounding prior to “ignition on.” Once
ignition is on, stop grounding, then
ground 7 times.
090307
Содержание Trip 2012
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