User's Manual

14
To Maximize The Effectiveness Of The Bendix
®
ESP
®
System with the EC-80
™
Controller:
• Loads must be properly secured at all times.
• Drivers need to exercise extreme caution at all times,
plus avoid sharp turns, sudden steering adjustments
or abrupt lane changes at high speeds, particularly if:
› the vehicle hauls loads that could shift;
› the vehicle or load has a high or off‑set center of
gravity (CG) when loaded; or
› the vehicle tows doubles or triples.
Truck Chassis Modications
If the vehicle’s chassis components are altered (for
example, a wheel base extension or reduction; tag
axle addition or removal; a major body change such as
conversion of a tractor into a truck; or an axle, suspension,
or steering system component modication) the Bendix
®
ESP
®
system must be disabled. Have a qualied mechanic
replace the Bendix ESP EC‑80 Controller with a Bendix
®
ESP
®
ATC EC‑80
™
Controller and secure the X4 connector
(which will no longer be used). The ATC/ESP indicator
lamp would continue to function as an ATC indicator lamp,
and should be designated as ATC only.
If a modied vehicle does not have the Bendix
®
ESP
®
system disabled, serious vehicle braking
and performance issues could result, including
unnecessary ESP system interventions. This can
lead to a loss-of-control of the vehicle.
In addition, remove all cab signage (e.g. visor
labels, etc.) that were used to show that the Bendix
ESP system was installed. Make any necessary
notations in the vehicle manual(s), so that drivers do
not misunderstand which ABS options are installed
on the vehicle.
Sensor Location Modications
The location and orientation of the Steering Angle Sensor
and Yaw Rate Sensor must not be altered. When servicing,
an identical component must be used in the same
orientation (using OEM brackets & torque requirements).
During installation follow the OEM leveling guidelines.
Steering Angle Sensor Re-Calibration
Whenever maintenance or repair work is performed to the
steering mechanism, linkage, steering gear, adjustment of
the wheel track, or if the steering angle sensor is replaced,
a recalibration of the Steering Angle Sensor must be
performed.
If the Steering Angle Sensor is not recalibrated, the
yaw control system may not function properly, which
can result in incidents leading to loss of vehicle
control. See page 19 of this document for more
details on this procedure.
DYNAMOMETER TEST MODE
Bendix ATC and ESP systems must be disabled prior
to conducting any dynamometer testing. When the
Dynamometer Test Mode is engaged, the Bendix ATC
EC‑80 Controller's brake control and engine control —
along with drag torque control and Bendix ESP system
functions — are disabled. This test mode is used to avoid
torque reduction or torque increase and brake control
activation when the vehicle is operated on a dynamometer
for testing purposes.
The Dynamometer Test Mode may be activated by pressing
and releasing the diagnostic Blink Code Switch ve times
or by using a hand‑held or PC‑based diagnostic tool.
During Dynamometer Test Mode the ATC lamp remains ON.
Bendix ESP EC‑80 Controllers will remain engaged in
the Dynamometer Test Mode even if power to the ECU
is removed and re‑applied. To exit the test mode, press
and release the Blink Code Switch three times, or use a
hand‑held or PC‑based diagnostic tool.
AUTOMATIC TIRE SIZE CALIBRATION
The ECU requires a precise rolling circumference ratio
between steer axle and drive axle tires in order for the
Bendix ABS, ATC, and ESP systems to perform in an
optimal manner. For this reason, a continuously monitoring
process takes place in which the precise ratio is calculated.
This calculated value is stored in the ECU memory
provided the following conditions are met:
1. Rolling‑circumference ratio is within the permissible
range;
2. Vehicle speed is greater than approximately
12 mph/19 kph;
3. No acceleration or deceleration is taking place; and
4. There are no active speed sensor Diagnostic Trouble
Codes (DTCs).
The ECU is provided with a ratio value of 1.00 as a default
setting. If the automatic tire size alignment calculates a
different value, this is used to overwrite the original gure
in the memory. This process adapts the ABS and ATC
function to the vehicle.