Bendix Commercial Vehicle Systems EC-60 ESP Controllers (Advanced Models) - Manual (Page 14)

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For further information, contact either the vehicle
manufacturer, Bendix or your local authorized Bendix
dealer.
1. Position and secure the EC-60
™ controller in the original
mounting orientation using the mounting bolts retained
during removal. Use no more torque than is necessary
to firmly secure the ECU into position. Over-tightening
the mounting hardware can cause damage to the
EC-60 ™ controller.
2. Reconnect the electrical connectors to the EC-60 ™
controller.
3. Apply power and monitor the EC-60 ™ controller power-up
sequence to verify proper system operation.
See Troubleshooting: Wiring section beginning on page
38 for more information on wire harnesses.
WARNING: Bendix ESP stability system is validated
with specific Bendix ® components. Always use Bendix ®
replacement parts to prevent compromising system
performance. Bendix is not able to validate the safe and
reliable use of substitute or alternate components that may
be available from other manufacturers. Further, suppliers
of a non-Bendix ® ABS component may implement design
changes in their component (without the knowledge or
approval of Bendix) which could negatively affect antilock
system reliability and braking performance issues.
REMOVAL OF THE STEERING ANGLE
SENSOR
Service Checks:
1. Check all wiring and connectors. Some installations also
include an intermediate connector from the steering
angle sensor to the main vehicle wire harness. Make
sure all connections are free from visible damage.
2. Examine the sensor. Make sure the sensor, its mounting
screws, and the interface between the hub and the
steering column are not damaged.
Diagnostics:
The steering angle sensor is only operational in conjunction
with an Advanced ABS ECU. No independent diagnostics
can be performed on the sensor.
Removal:
1. Remove steering column sheathing.
2. Depending upon manufacturer, the steering angle
sensor could be located either near the steering wheel,
necessitating the removal of the steering wheel, or
near the joint to the vehicle steering mechanism,
necessitating the disconnection of this linkage.
3. Unplug sensor cable assembly from body of sensor.
Squeeze the mounting tabs and pull gently on connector
until it disengages.
4. Unscrew all three of the mounting screws that hold the
body of the sensor to the steering column body.
5. Slide the sensor over the column to remove. Take note
if the sensor label is facing upward or downward.
Installation:
1. Obtain a new sensor. The sensor is not repairable in
the field.
2. Slide the sensor over the column. The center hub of the
sensor must be aligned with the corresponding notch
in the column. Different column manufacturers may
implement this hub alignment in different ways. The
sensor label should be facing in the same direction as
the removed sensor.
3. Assemble to column non-moving plate with three self-
locking screws.
4. Tighten screws to 65N to 100N.
5. Reconnect the connector. Ensure that there will be no
force applied to the sensor because the connector is
pulling on the sensor body.
6. If the wire harness leading to the sensor is being
replaced, ensure that it is adequately tie wrapped
so that the full motion of the steering column can be
achieved without pulling apart the connectors.
7. Reinstall the column sheathing. The sensor is not
protected against dirt or water intrusion, so care
must be taken not to introduce these elements during
installation.
Steering Angle Sensor Calibration
The steering angle sensor calibration can only be achieved
when the sensor is powered by the Advanced ABS ECU.
No stand-alone sensor calibration can be carried out. The
calibration procedure is performed using Bendix ® ACom ™
Diagnostic V4.0 or higher. See “Troubleshooting Diagnostic
Trouble Codes: Steering Angle Sensor (SAS-60)” for the
calibration procedure using this tool. The sensor must be
recalibrated after any of these situations:
• Replacement of the steering angle sensor
• Any opening of 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
• Adjustment of the wheel alignment or wheel track
• After an accident that may have led to damage of the
steering angle sensor or assembly
WARNING: If the steering angle sensor is not properly
recalibrated as needed, the yaw control system may
not function properly, which can result in a loss of
vehicle control.
REMOVAL OF THE YAW RATE/LATERAL
ACCELERATION SENSOR
Service Checks:
1. Check all wiring and connectors. Make sure all
connections are free from visible damage.
2. Examine the sensor. Make sure the sensor, its mounting
bolts, and the mounting bracket are not damaged.
3. Check vent hole in underbody of sensor housing. Vent
hold should remain free from paint and debris at all
times.