Bendix Commercial Vehicle Systems TRDU - Manual (Page 2)

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S-1439 © 2010 Bendix Commercial Vehicle Systems LLC 8/2010 Printed in U.S.A. All Rights Reserved.
2. The ECU does not support PID194, a standard message defined
in the J1587 specification.
3. The ECU, J560, or diagnostic connector has no power.
4. The TRDU ™ unit can not arbitrate bus access.
5. A malfunctioning TRDU unit.
If no active codes are present, the warning lamp will display 1-1
repeatedly for TABS-6 equipped trailers.
This will provide the user more detailed information regarding the
code and it will be a reminder to remove the TRDU ™ after service is
complete.
If communications issues continue, contact Bendix at 1-800-AIR-BRAKE
(1-800-247-2725) Monday through Friday 8 a.m. to 6 p.m. EST. Please
have the Bendix ECU type, product part number & configuration,
vehicle make and model information when you call.
WARNING! PLEASE READ AND FOLLOW THESE
INSTRUCTIONS TO AVOID PERSONAL INJURY
OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the parking brakes,
and always block the wheels. Always wear safety glasses.
2. Stop the engine and remove ignition key when working
under or around the vehicle. When working in the engine
compartment, the engine should be shut off and the ignition
key should be removed. Where circumstances require that
the engine be in operation, EXTREME CAUTION should be
used to prevent personal injury resulting from contact with
moving, rotating, leaking, heated or electrically charged
components.
3. Do not attempt to install, remove, disassemble or assemble
a component until you have read and thoroughly understand
the recommended procedures. Use only the proper tools
and observe all precautions pertaining to use of those tools.
4. If the work is being performed on the vehicle’s air brake
system, or any auxiliary pressurized air systems, make
certain to drain the air pressure from all reservoirs before
beginning ANY work on the vehicle. If the vehicle is equipped
with an Bendix ® AD-IS ® air dryer system or a dryer reservoir
module, be sure to drain the purge reservoir.
5. Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle.
6. Never exceed manufacturer’s recommended pressures.
7. Never connect or disconnect a hose or line containing
pressure; it may whip. Never remove a component or
plug unless you are certain all system pressure has been
depleted.
8. Use only genuine Bendix ® brand replacement parts,
components and kits. Replacement hardware, tubing, hose,
fittings, etc. must be of equivalent size, type and strength
as original equipment and be designed specifically for such
applications and systems.
9. Components with stripped threads or damaged parts should
be replaced rather than repaired. Do not attempt repairs
requiring machining or welding unless specifically stated
and approved by the vehicle and component manufacturer.
10. Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
11. For vehicles with Automatic Traction Control (ATC), the ATC
function must be disabled (ATC indication lamp should be
ON) prior to performing any vehicle maintenance where one
or more wheels on a drive axle are lifted off the ground and
moving.
Any references in these instructions to WABCO, HALDEX and any other company or
trademark are solely for identification and/or cross reference purposes. The trademarks
are the property of their respective companies and are not affiliated with, or endorsing
Bendix CVS LLC.
Note: If connected to a Bendix product, the TRDU will show the sensor
location (e.g. SEN & LFT Led’s).
If connected to other OEM systems, only one LED will illuminate for
a sensor fault, and the corresponding OEM designation must be read
from the label on the side of the TRDU. Consult OEM documentation
for wheel end location. Mod faults are interpreted by color, on the label.
RESET FUNCTION
The magnetic reset switch is located at the “B” in the Bendix logo
in the top of the TRDU ™ unit. Activation requires a magnet with 30
gauss minimum.
Using a magnet, the reset operations are:
1. If the magnet is held over the reset switch for less than 6 seconds
and then removed, all Diagnostic Trouble Codes are cleared.
2. If the magnet is held over the switch for more than 6 seconds
but less than 11 seconds the self-configuration command is sent
(Bendix MC-30 ™ and TABS-6 ECUs only). The self-configuration
is indicated when the LEDs illuminate then flash on and off in 2
half-circle patterns.
NOTE: The “clear codes” and “self configuration” functions may not
operate with other ABS manufacturer’s ECUs.
AFTER REPAIRS ARE MADE
It is recommended at the end of any repair to switch off and restore
the power to the ABS ECU, then check the ABS Warning Lamp and
TRDU ™ tool to see if any Diagnostic Trouble Codes remain.
ODOMETER FUNCTION
The odometer mileage will be blinked out on the blue LED labeled
ODO immediately upon the ABS ECU establishing communications
and repeated every 10 seconds. The odometer reading is displayed
by the thousands (x 1000). e.g. 152,287 miles would be presented as:
152 (x1000) or 1 blink – pause, 5 blinks – pause, and 2 blinks.
A zero will be displayed by quickly strobing the Blue ODO LED twice.
ABS WARNING LAMP BLINK CODES
NOTE: This feature only available with TABS-6 ™ ECUs.
When communications with a trailer TABS-6 ™ ECU is established, the
TRDU ™ will cause the TABS-6 ™ ECU to blink out any active codes
on the trailer warning lamp.
Blink Code Lamp Timing
Action Timing
Duration of indicator blink pulse (lamp on) 0.4 seconds
Duration of indicator blink pulse (lamp off) 0.4 seconds
Strobe characteristics for display of zero
digit (ON-OFF-ON)
0.2 Hz for 0.4 seconds @
50% duty cycle
Duration between blink code digits 1.0 seconds
Duration between blink code messages 2.5 seconds
Duration of indicator illumination at
completion of messages
5.0 seconds
ECU COMMUNICATION PROBLEMS
If the TRDU
™ unit does not establish communication with the
ABS ECU, it will illuminate each LED in a clockwise pattern.
This pattern will continue until the ABS ECU responds and
communication has been established. Note: The TRDU ™
cannot communicate with non-PLC ABS units.
Possible sources of communication problems are:
1. The J2497 (PLC4Truck) communication is not present at the SAE
J560 connector, or the ECU does not support PLC diagnostics.