BENDIX TCH-013-007 User Manual

Technical Bulletin

Bulletin No: TCH-013-007 Effective Date: 10/23/03 Cancels: NA Page: 1 of 2

Subject:

The EC-30T electronic controller is a part of a voluntary recall campaign, recall number:
03E-043. The EC-30T is the electronic controller of the Bendix MC-30 Trailer ABS Controller
Assembly.

What You Need To Do
All vehicle manufacturers, dealers and distributors should stop selling any EC-30T or MC-30
that does not include an MC-30 Fuse Adapter Assembly. Please make your customers aware of
the recall campaign. All new EC-30Ts and MC-30s will be shipped with an MC-30 Fuse
Adapter Assembl y.

The Problem
Bendix has determined that if the trailer-mounted ABS warning la mp circuit experiences an
electrical short for reasons unrelated to the EC-30T, and the short is not repaired, the high side
power switch inside the ECU may eventually become thermally stressed and experience an
electrical short. The high side power switch controls the illumination of the trailer-mounted
ABS warn in g lamp.

If the power switch shorts, it can result in an over-current condition in the ECU and lead to excessive heat, smoke
and in rare cases, even fire in the ECU, the connector or the pigtail wiring harness. The fire that could result from
this situation involves an unreasonable risk to motor vehicle safety. The service, parking and emergency braking
of the trailer and tractor are not affected by this condition.

The Cause
The electrical short must occur in the wiring between the ECU and the warning lamp. Failure cannot be caused
by any wiring defect on the ground side of the warning lamp.

Bendix

®

EC-30T™ ECU Product Recall Campaign

EC-30T™ ECU

Figure 1 - MC-30™ Trailer

ABS Controller Assembly

How to Identify the EC-30T
The EC-30T can be identified by the black plastic enclosure imprinted
with the Bendix® logo, and containing a single 30-pin connector and
an LED diagnostic display.

EC-30T or MC-30s in Inventory
If your current inventory contains MC-30 or EC-30T, an MC-30 Fuse
Adapter is required for installation. Fuse adapter kits are available in
3, 4 and 5-pin configurations. To identify the correct piece number
needed check the connector of the pigtail harness that connects to the
chassis harness. See figure 2 for kit piece numbers. To order the
MC-30 Fuse Adapter Kit, please call the Recall Assistance Center at
1-800-478-1793 between 8:00am to 5:00pm E.S.T.

Final
Design

(Kit Pc. No. 801694)

or

5-Pin

Figure 2 - Fuse Adapter Assemblies

Interim
Design

3-Pin

(Kit Pc. No.

801729)

4-Pin

(Kit Pc. No.

801730)

Bendix will send owners/operators with an MC-30 Trailer ABS unit a modification kit at no charge. The kit
contains a labor reimbursement form that must be completed and returned for reimbursement. Bendix will
provide a reimbursement of $20 ($26.07 Canada) to cover labor necessary to install the kit. If during the
installation of this kit it is determined that the pigtail harness o r the ECU are da maged the d a maged co mponent(s)
can be submitted for standard warranty processing.

If you are a lessor of vehicles equipped with the MC-30 Trailer ABS Controller Federal la w requires that any
vehicle lessor receiving the recall notice must forward a copy of the notice to the lessee within ten days.

How to Contact Us
Please telephone our Recall Assistance Center with any questions you may have about this voluntary safety recall
campaign. The toll-free telephone number is at 1-800-478-1793. Bendix representatives are available to assist
you Monday – Friday, 8:00 a.m. – 5:00 p.m. EST, for your convenience. You may also email the recall center
any time at [e-mail].

After completing the repair, send the Reimbursement Request Form (provided with the kit) to Bendix, along with
the original repair receipt and/or other adequate proof of your payment for the repair for the labor allowance. Fax
or return the materials to Bendix:

Fax: [phone]

Address:
Bendix Commercial Vehicle Systems LLC
Attention: EC-30T Recall Center
901 Cleveland Street
Elyria, OH 44035