Fault Code Guide

3. At the PLC filter, connect one lead of the DMM
to the green wire (at the 2-pin connector with the
green and yellow wires) and the other lead to
one of the blue wires (at the 2-pin connector with
the two blue wires). Measure the capacitance.
• If the reading is 4.8 to 7.2 µF, go to the
next step.
• If the reading is less than 4.8 or more than
7.2 µF, one or more of the internal capaci-
tors is faulty. This may affect PLC function-
ality and/or noise in the electrical system.
Replace the PLC filter.
4. At the PLC filter, connect one lead of the DMM
to one of the blue wires (at the 2-pin connector
that has the two blue wires) and connect the
other lead to the ground where the white wire
terminates. Measure the capacitance.
• If the reading is 9.91 to 11.91 µF, the PLC
filter is functioning properly.
• If the reading is less than 9.91 or more
than 11.91 µF, check and clean the ground
connection where the white wire termi-
nates and retest. If the reading is still un-
satisfactory, one or more of the internal
capacitors is faulty. This may affect PLC
functionality and/or noise in the electrical
system. Replace the PLC filter.
Meritor WABCO Pneumatic Antilock Braking System
(ABS)
42.00
ABS System Troubleshooting
Business Class M2 Workshop Manual, Supplement 2, June 2002300/18