Bendix Commercial Vehicle Systems EC-60 ESP CONTROLLERS ADV - Manual (Page 20)

20
BRAKE DEMAND SENSOR CALIBRATION
Calibration must be performed under the following conditions:
• After servicing any pressure sensor related DTCs
• Replacement of any sensor
The calibration procedure is performed using Bendix ACom
Diagnostics V4.0 or newer versions.
See “Troubleshooting Diagnostic Trouble Codes: Brake
Demand Sensor/Load Sensor” for the calibration procedure.
PRESSURE SENSOR INSTALLATION
REQUIREMENTS
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 and its
interface to the pressure location are not damaged.
Diagnostics:
The pressure sensor can be independently diagnosed
when supplied with a five volt voltage supply to the B
location and ground to the A location. Signal output on
the C location should read approximately 0.5V if there is
no pressure applied. The signal output should increase
proportionately as pressure is applied, up to a maximum
of 4.5V at 150 psi.
Removal:
1. Unplug sensor cable assembly from body of sensor.
Pull gently on the mounting tab and connector until it
disengages.
2. Remove sensor from its pressure mounting using
approved air brake push in fitting tools.
Installation:
1. Obtain a new sensor. The sensor is not repairable in
the field.
2. Insert sensor into pressure fitting using approved tools.
3. Reconnect the connector. Ensure that there will be no
force applied to the sensor because the connector is
pulling on the sensor body.
4. If the wire harness leading to the sensor is being
replaced, ensure that it is adequately tie wrapped.
Pressure Sensor Calibration:
There is no need for pressure sensor calibration as long
as the part replaced is identical to the part removed and
a component approved for use with the Bendix Advanced
ABS system. However, replacement of brake demand
sensors or clearing of demand pressure sensor related
DTCs require the following:
1. Use of ACom V4 or newer to clear the active p-sensor
fault.
2. Carrying out the demand p-sensor initialization
procedure which involves applying service brakes of
90 psi or greater for 3 sec (while stationary).
Once this procedure is carried out successfully, if there are
no other active DTCs, ATC/ESP indicator will no longer
illuminate.