Product specifications

24
Sensor Gap Adjustment
Push the sensor into its holder until it contacts the tooth wheel. At installation, there must be no gap between the
sensor and the tooth wheel. Measure the AC voltage output. The value should be 0.2 volt AC when the wheel is
rotated at a rate of 1/2 revolution per second. Perform any necessary repairs. Repeat the sensor installation check.
If the trailer lamp still does not go out, a system fault exists. Perform a fault code check.
Fault Code Check
Use constant power activation to perform the following fault code check.
1. Apply constant power to the ECU/single modulator valve assembly for more than one, but less than five seconds.
2. Remove the power.
3. Reapply the power.
4. Check the trailer ABS indicator lamp on the side of the trailer. The fault code will be displayed three times.
5. Find the fault on the chart and perform the necessary repairs.
6. After performing the necessary repairs, repeat the end of line test to verify correct sensor installation.
Blink Code Chart (Most common codes - for more info see Meritor Wabco TP-0173 chart)
Blink Code Problem Area Action
4 Sensor YE1 (curbside sensor) Check sensor installation. Perform necessary repairs.
6 Sensor YE2 (roadside sensor) Check sensor installation. Perform necessary repairs.
7 ECU/single Verify correct installation. If code continues, contact
modulator valve assembly Meritor WABCO for assistance.
14 Power Supply Verify correct electrical installation. Check power supply.
Perform necessary repairs.
15 ECU Failure Verify correct installation. If codecontinues, contact
Meritor WABCO for assistance.
16 SAE J1708 Failure Internal failure, contact Meritor WABCO.
17 SAE J2497 Failure Internal failure, contact Meritor WABCO.
18 Generic I/O Failure Verify correct electrical installation. Check power supply.
Perform necessary repairs.
ABS TECH INFO - ARVIN MERITOR
End of Line Testing without TOOLBOX™Software
1. Apply 12 volts DC power to the ABS.
2. The ECU/single modulator valve assembly should click two times.
3. If the indicator lamp comes on for three seconds and goes out: This indicates a correct installation. The end of line
test is complete. If the ABS indicator lamp comes on and stays on, check the sensor installation:
A. Remove the power from the ABS and raise the sensed wheels so they may be rotated.
B. Repeat Step 1 and Step 2.
C. Rotate each sensed wheel — one at a time — at a rate of 1/2 revolution per second. This rate equals a
wheel speed of approximately 4 mph (7 kph). The ABS indicator lamp should now go out and stay
out indicating a correct installation. The end of line test is complete.
4. If the ABS lamp does not go out, there is a sensor gap problem or hardware fault. Adjust the sensor and, if
necessary, perform a fault code check.
( Using the ABS lamp
to check the line.)