SB 399

Service Bulletin No. 399
MODEL
TYPE
J4500 Series
SECTION/GROUP
Field Change Program
DATE
7-Electrical
Oct. 2, 2013
SUBJECT
WABCO ESC/ ABS ECU
CONDITIONS
Customer Complaint:
Motor Coach Industries ("MCI") has become aware that the incorrect electronic control unit ( ECU ), which
controls the antilock braking system ( ABS ) on the trailing ( tag ) axle, was installed at the production plant.
An incorrect ECU on a coach equipped with a rear axle steering ( RAS ) tag axle could result in unnecessary yaw
corrections by the electronic stability control ( ESC ) system at speeds below 20 mph. The operator may
experience a small bump steer force at the steering wheel and minor jerking motion of the coach due to brief
system application of the service brakes at one or more of the wheel ends.
Cause:
Incorrect part installed at production plant.
Corrective Action:
MCI will remedy the affected coaches at no cost to customers by replacing the ECU. However, proper repairs will
require the use of specialized equipment, and therefore MCI strongly urges customers to make an appointment as
soon as possible by calling the MCI Customer Service Line at 1-800-241-2947, to have a the repairs performed by
trained technicians who have the necessary equipment.
65730 to 65731
65780 to 65782
65784 to 65785
65877
65914
65917
65957 to 65958
65965 to 65968
65974
65991
66052 to 66056
66058 to 66059
66100 to 66101
66134 to 66137
66140 to 66146
66174
66209 to 66210
66266
66272
66279 to 66283
66342 to 66348
66363 to 66367
66385 to 66386
66388
66390 to 66393
66395
66397 to 66400
66405
66443 to 66446
Parts
Qty.
New P/N
Description
1
07-08-3735
Electronic Control Unit ( ECU )
Service Bulletin No. 399
Date OCT. 2, 2013
Page
2
Service Procedure:
Read this entire procedure before beginning work.
Use Safe Shop Practices At All Times.
1. Position the main disconnect rotary switch to the DOWN ( OFF ) position.
2. Chock both sides of the tires.
3. Open the curbside and roadside doors of baggage bay compartment #3.
4. Locate the rear electrical junction box mounted to the ceiling of baggage bay compartment #3. Release the
rubber T-straps on the electrical junction box closing panel.
5. Locate the ECU on the hinged electrical junction box closing panel ( refer to Figure 1.).
Figure 1.
6. Carefully disconnect the four ( 4 ) harnesses from the ECU.
7. Remove and retain the mounting hardware from the ECU. Remove and retain the ECU for submittal back to
MCI.
Service Bulletin No. 399
Date OCT. 2, 2013
Page
3
8. Orient the new ECU, p/n 07-08-3735, with the mounting holes.
9. Using the mounting hardware removed in Step 7, secure the ECU to the closing panel. Torque to 32 in-lbs.
10. Orient and connect the four ( 4 ) harnesses.
Figure 2.
11. Close the closing panel. Pull to engage the rubber T-straps to secure in the closed position ( Figure 3 )
Figure 3.
12. Perform End of Line calibration.
Procedure Complete.
Service Bulletin No. 399
Date OCT. 2, 2013
Page
4
Mail or fax the completed limited warranty claim form and verification form to MCI’s warranty department, or photocopy and mail to:
MCI Fleet Support
Attn: Warranty Department
7001 Universal Coach Drive
Louisville, KY 40258
Fax Number 1-800-360-8886
to receive credit for the hours used to complete this task. Contact the MCI Fleet Support Technical Center at
1-800-241-2947 for any further information.
Field Change Program Conditions:
The parts required for this change will be supplied without charge.
Specialized programming equipment is required to perform this campaign.
NO PAYMENT WILL BE ISSUED BY MOTOR COACH INDUSTRIES UNTIL THE COMPLETED WARRANTY
CLAIM FORM AND THE EXISTING ECU HAVE BEEN RECEIVED BY MCI.
A labor allowance of 1.0 hour will be granted for the procedure of installing the specified part(s) in this bulletin on
J4500 Series coaches.
This labor allowance will be credited to your MCI Fleet Support Parts Account on receipt of the attached
“MCI Field Change Program Verification Form” and a “Warranty Claim Form” as detailed in your Owner Warranty
manual to MCI’s Warranty department. A “MCI Field Change Program Verification Form” needs to be submitted for
each VIN affected. Photocopy the attached “MCI Field Change Program Verification Form” as required for the
number of affected coaches in your fleet.
This program will end on April 16, 2014.
Motor Coach apologizes for any inconvenience resulting from this campaign, but urges you to implement this
change as soon as possible.
Sincerely,
Motor Coach Industries
U.S. and Canadian Service Departments.
MCI FIELD CHANGE PROGRAM (FCP) VERIFICATION
CONTACT INFORMATION
CUSTOMER NAME:
____________________________________________________
(PLEASE PRINT
FCP INFORMATION – ONE FORM PER UNIT
FCP#: _________
Coach Model ___________
COACH SERIAL #:
(At least the last 5 digits)
Model Year _____________
DATE COMPLETED __
/ __ /__
MILEAGE:
IMPORTANT: TO RECEIVE CREDIT FOR ANY ALLOWABLE LABOR CHARGES, THIS VERIFICATION FORM
MUST BE RETURNED TO MCI UPON COMPLETION OF THE FCP.
SUBMITTED BY: (Please Print)
________________________________________________________________
DATE
__ / __ /__
TITLE: (Please Print) ____________________________________________
SIGNATURE:
________________________________________________________________
COMMENTS:
F A X T O : 800-360-8886
MAILING ADDRESS:
MOTOR COACH INDUSTRIES
ATTN: WARRANTY DEPT.
7001 UNIVERSAL COACH DRIVE
LOUISVILLE, KY 40258
MCI part # 03-15-7738C