BENDIX TCH-013-013 Fiche De Données
Technical
Bulletin
Bulletin No: TCH-013-013
Effective Date: 10/27/06
Cancels: N/A
Page: 1 of 2
Subject:
Bendix
®
Advanced ABS Systems: Repair and Calibration
Bendix ABS systems use sensors to monitor the vehicle's motion. For basic ABS braking and/or traction
functions, the Electronic Control Unit (ECU) uses the wheel speed sensors to detect wheel-slip conditions and
intervenes as needed.
functions, the Electronic Control Unit (ECU) uses the wheel speed sensors to detect wheel-slip conditions and
intervenes as needed.
In addition, Bendix advanced ABS ECUs, for example the Bendix
®
EC-60
™
Advanced ABS with ESP
®
stability,
monitor the wheel speed sensors, steering wheel position, brake demand, vehicle load, and yaw rate/lateral
acceleration sensors to reduce the risk of rollovers, jackknifi ng and other loss of control.
acceleration sensors to reduce the risk of rollovers, jackknifi ng and other loss of control.
ECU CONFIGURATION
Unlike previous generations of ECUs, Bendix
®
EC-60
™
Advanced
ECUs are vehicle-specifi c and are individually confi gured. Bendix
and the original equipment manufacturer work together to specifi cally
customize the stability system for the individual vehicle confi guration
and its sensors. As a result, the vehicle's VIN number is required
when ordering a replacement ECU to ensure the same confi guration
is preset. See the Service Data sheet (SD-13-4869) for more
information.
and the original equipment manufacturer work together to specifi cally
customize the stability system for the individual vehicle confi guration
and its sensors. As a result, the vehicle's VIN number is required
when ordering a replacement ECU to ensure the same confi guration
is preset. See the Service Data sheet (SD-13-4869) for more
information.
SENSOR CALIBRATION
Since advanced ABS ECUs are individually customized based on
expected sensor locations and orientations, an out-of-calibration
sensor, or incorrectly positioned sensor, may lead to unwanted
and/or unneeded stability interventions, which can result in incidents
leading to loss of vehicle control.
expected sensor locations and orientations, an out-of-calibration
sensor, or incorrectly positioned sensor, may lead to unwanted
and/or unneeded stability interventions, which can result in incidents
leading to loss of vehicle control.
A list of examples below show many vehicle maintenance
procedures that need to include Advanced ABS sensor recalibration.
Bendix
procedures that need to include Advanced ABS sensor recalibration.
Bendix
®
ACom
®
PC diagnostic software (version 5.3 or higher) is
used to recalibrate the sensors.
1. Steering Angle Sensor Examples.
The Steering Angle Sensor must be recalibrated as part of:
•
Steering wheel replacement (see Caution below.)
•
Steering angle sensor replacement
•
Any maintenance that involves opening the connector hub from
the steering angle sensor to the column
the steering angle sensor to the column
•
Any maintenance or repair work on the steering linkage, steering
gear or other related mechanism
gear or other related mechanism
•
Wheel alignment or wheel track adjustment
• Accident repairs where damage to the steering angle sensor
or assembly, or any part of the steering system may have
occurred
occurred
continued over ...
CAUTION: When replacing a steering wheel, use only OEM-approved
steering wheels. Take care not to damage the Steering Angle Sensor or
interfere with its operation during installation.
steering wheels. Take care not to damage the Steering Angle Sensor or
interfere with its operation during installation.
A Bendix WS-24
™
Wheel speed sensor.
B Bendix SAS-60
™
Steering Angle Sensor
(mounted to the steering column).
C Bendix YAS-60
™
Yaw Rate/Lateral Acceleration
Sensor (typically mounted to a cross-member
near the back of the vehicle cab).
D Brake Demand Sensor (installed in the primary
and secondary delivery circuits), also used
as a Load Sensor (typically installed in the
suspension air bag).
A
B
C
D
Bendix EC-60
™
Advanced ABS Controller
TYPICAL
ADVANCED ABS
COMPONENTS
ADVANCED ABS
COMPONENTS