26
Installation
8. For 4S/3M installations: Repeat this test for the L valve.
L Valve: The external relay valve designated L valve is an axle control valve. It controls brake
chambers on one or two axles. It is important that delivery lines from Port 2 are plumbed as shown
on the installation drawings. The 4S/3M system is designed to be used with a variety of trailer
con
fi
gurations. Refer to Figures 16-18.
9. Click on the Test button to activate the ABS indicator lamp — this is the lamp that is mounted on the
side of the trailer. The lamp will
fl
ash multiple times, indicating lamp installation is OK. The Test Status
box at the bottom of the menu will display the status of this test. Figure 22.
10. Click on Close to exit.
5.2.3 Sensor Orientation Test
This test is not for use on 4S/3M installations.
For 4S/3M installations, use the standard Sensor Test. To run the standard test, select Sensor Test from the
Components Test Menu.
The sensor orientation test must be performed as part of the end of line testing procedure. Figure 23.
Fig. 23
4017112a
5.2.3.1 Sensor Orientation Test Screen
Before beginning this test, look at the control port to see if it faces the front or rear of the trailer.
TOOLBOX PLUS™ will ask for this information to start the test (Step 5). To perform the sensor orientation
test:
1. Raise the sensed wheel ends off the ground.
2. Apply air to the emergency line to
fi
ll the air tanks and release the spring brakes so that the wheels
can be rotated.
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 24.