BENDIX BW2189 Manuel D’Utilisation

This will be the case when an MC-30

™

 controller is installed 

on a powered vehicle auxiliary axle.

An MC-30

™

 controller with PLC will continuously broadcast 

PLC messages that indicate trailer ABS status.  At power-
up or during a trailer ABS fault condition, the MC-30

™

 

controller will signal the tractor ABS unit to illuminate the  
dash mounted trailer ABS indicator lamp.

Diagnostic tools are available that detect the presence 
of a PLC signal and perform further system diagnostics 
directly on the power line.  For more information on these 
diagnostic tools, contact Bendix or refer to your local 
authorized Bendix dealer.

An oscilloscope can also be used to verify the presence 
and strength of a PLC signal on the power line.  The PLC 
signal is an amplitude and frequency modulated signal.  
Depending on the load on the power line, the amplitude of 
the PLC signal can range from 5.0 mV p-p to 7.0 V p-p.

Suggested oscilloscope settings are (AC coupling, 1 volt/
div, 100 µsec/div).  The signal should be measured on 
pin 7 of the J560 connector at the nose of the trailer.  See 
Figure 3 and Figure 4 for examples of PLC measurements 
using an oscilloscope.

All connector leads of the MC-30

™

 controller pigtail harness 

are weather sealed at the connector interface and are 
clearly labeled for proper installation.

Non over-molded versions of the MC-30

™

 controller pigtail, 

shown in Figure 5, are repairable.  If repairs are needed, 
see chart 12 for connector and tool information.

Over-molded versions of the wiring harness must be 
replaced if corrosion or damage occurs.

The 30-pin ECU connector of the pigtail is fastened to the 
EC-30T

™

 controller with a jackscrew tightened to 15-20 

in. lbs.  Improper tightening of the connector jackscrew 
can cause environmental contamination or damage to the 
EC-30T

™

 controller.  The use of a inch-pound torque wrench 

is recommended.

The MC-30

™

 controller pigtail utilizes the TTMA RP 97-99 

5-pin Packard Weather Pack connector for brake light 
power, constant power, ground and the trailer mounted ABS 
indicator lamp.  The Power/ABS Indicator Lamp lead of 
the pigtail harness is available in various lengths to satisfy 
installation requirements such as slider axles.  

Two or four wheel speed sensor connectors are provided.  
These 2-pin connectors are labeled Right Front (RHT FRT), 
Left Front (LFT FRT), Right Rear (RHT RER) and Left Rear 
(LFT RER).  Right Front and Left Front wheel speed sensor 
inputs must be used for two sensor installations, even if 
the wheel speed sensors are not physically located on the 
forward axle.  Extension cables are available from Bendix 
that will provide longer wheel speed sensor lengths when 
required by the installation.

One or two modulator connectors are provided.  These 3-pin 
connectors are labeled MOD 1 and MOD 2.  Modulator 1 
is always used for single modulator installations.  For two 
modulator confi gurations, Modulator 1 is installed at the 
right or front position.  Modulator 2 is installed at the left 
or rear position.  An extension cable must be used for 
Modulator 2.  The remote modulator harness is available 
in various lengths to satisfy any installation requirement.  
See Figure 6.

An optional 4-pin diagnostic connector provides a port 
for connecting a diagnostic tool.  The connector provides 
ignition power, ground and data lines.  Remote diagnostic 
cables are available from Bendix that will provide a 
standard J1708/J1587 diagnostic port at the side of the 
trailer.  See Figure 7.

The EC-30T

™

 controller utilizes a pigtail wire harness to 

interface with ABS and other trailer system components.  
Various pigtail harness part numbers are available from 
Bendix. The following connectors are optional and may not 
be present on all pigtail harnesses:  Modulator 2, auxiliary, 
diagnostic, and rear axle wheel speed sensors.