BENDIX RDU Installation Instructions

Installation
Instructions
BENDIX RDU REMOTE DIAGNOSTIC UNIT
® ™
The Bendix RDU (Remote Diagnostic Unit) is a diagnostic
® ™
tool providing the technician with a visual indication of Antilock
Braking System (ABS) component Diagnostic Trouble Code
(DTC) information. The RDU
ABS-equipped semi-tractors, straight trucks, coaches, and
buses. Additionally, the RDU
clearing the ABS component diagnostic trouble codes from
Bendix ABS controllers and allows the technician to self-
®
configure the ABS ECU on Bendix
EC-60 ABS controller ECUs.
™
The RDU unit is specifically designed for use with Bendix
™
ABS and Bendix makes no claims for its operation and/or
usability with other brands of ABS systems.

DEVICE FEATURES

The RDU remote diagnostic unit attaches to the 9 pin
™
diagnostic connector in the cab of the vehicle. An adapter
cable (Bendix part number 801872) is available to connect
the RDU tool to vehicles with a 6-pin diagnostic connector.
™
The RDU tool allows the technician to:
™
•
Troubleshoot ABS system component problems using
Diagnostic Trouble Code reporting via LEDs.
•
Reset Diagnostic Trouble Codes on Bendix
by holding a magnet over the reset in center of RDU
for less than 6 seconds.
•
Enter the Self-Configuration Mode used by Bendix
ECUs by holding a magnet over the reset area for greater
than 6 seconds but less than 30 seconds.

OPERATION

See Figure 2 for typical vehicle connector locations.
When the RDU ™ unit is plugged into the diagnostic connector,
all the LEDs will illuminate, and the green LED will flash 4
times to indicate communications have been established.
If the ABS ECU has no active Diagnostic Trouble Codes,
only the green LED will remain illuminated.
If the ABS ECU has at least one active Diagnostic Trouble
Code the RDU ™ tool displays the first diagnostic trouble code
by illuminating the red LEDs, indicating the malfunctioning
ABS component and its location on the vehicle. (See Figure
3.) If there are multiple diagnostic trouble codes on the ABS
system, the RDU will display one diagnostic trouble code
first, then once that Diagnostic Trouble Code has been
repaired and cleared, the next code will be displayed.
unit can be used on Bendix
™
unit provides a method for
™
EC-17 , EC-30
® ™ ™
ABS ECUs
®
™
®
®
FIGURE 1 - THE BENDIX
, and
®
Located on
Dash Panel
(Note: An adapter is required when the vehicle
FIGURE 2 - TYPICAL VEHICLE DIAGNOSTIC
CONNECTOR LOCATIONS (J1708/J1587, J1939)
LED Diagnostic Trouble Codes
LFT - Left
RHT - Right
DRV - Drive Axle
ADD - Additional
STR - Steer Axle
tool
VLT - Power
ABS
Example: If the Diagnostic
Trouble Code is "Right
Steer Axle Sensor", the
RDU ™ unit will display one
green and three red LEDs
FIGURE 3 - DIAGNOSTIC TROUBLE CODES
Typical Combination Diagnostic Trouble Codes are:
•
Right steer sensor
•
Left steer sensor
•
Right drive sensor
•
Left drive sensor
•
Right additional sensor
•
Left additional sensor
•
Right steer modulator
•
Left steer modulator
LED lights
illuminate
Diagnostic
Trouble
Codes
(10 locations
in total)
Patents Pending
REMOTE DIAGNOSTIC UNIT
®
Located Under
Or
Dash Panel
has a 6-pin connector.)
ECU - ABS Controller
SEN - Wheel Speed
Sensor
MOD - Pressure Modulator
Valve
TRC - Traction Control
•
Right drive modulator
•
Left drive modulator
•
Right additional modulator
•
Left additional modulator
•
Traction modulator
•
ECU
•
Engine serial
communication
LEDs
Green
VLT
Red
SEN
STR
RHT
1