WABCO 400 500 320 0, Maintenance Manual

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Sensor Adjustment and Component Testing
3. Apply 12 volts DC to the ABS.
4. At the Trailer Main Menu, click on Component Test, then select Sensor Orientation Test to display the
Sensor Orientation Test screen. Figure 8.10.
When the Sensor Orientation Test screen fi rst appears, the Control Port Facing fi eld will display the
default—Front. This will occur regardless of the actual control port orientation of the installation being
tested.
Fig. 8.10
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5. Click on Front or Rear in the Control Port Facing fi eld to select the mounting orientation of the
ECU/dual modulator valve assembly. Figure 8.11.
Refer to Figure 8.10 and Figure 8.11 for illustrations of the ECU/dual modulator assembly mounted with the
control port facing forward and rear. The correct mounting orientation must be selected prior to starting the
test (Step 5).
Fig. 8.11
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2S/2M installations use C and D locations.
6. Click on Front, Rear or None in the Lift Axle Position fi eld to note if a lift axle is installed on an ABS
sensed axle. Note: Sensors E and F should always be installed on the lift axle to prevent unwanted
sensor faults.