BENDIX TCH-013-013 Fiche De Données

Page de 2
   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.
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.
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.
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. 
A list of examples below show many vehicle maintenance 
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
• 
Any maintenance or repair work on the steering linkage, steering 
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
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.
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