NHTSA ID Number: 10172395
Manufacturer Communication Number: LI4673E
TSB/Document Date: 2020-03-09
Summary
Obsolete AIC3 module needs to be replaced by the newer AIC4 module
L569
—
—
L82U4B4000001
L82U4B4000001
1
Moncton (Codiac) - New Brunswick
L570
—
—
L82U6B4000002
L82U6B4000002
1
Saskatoon - Saskatchewan
L568
—
—
S92U9B3000013
S92U9B3000013
1
New York City Transit - New York
L608
8000
8014
L82U6B4000047
L82U0B4000061
15
New York City Transit - New York
L620
8015
8074
L82U2B4000062
L82U7B4000123
60
New York City Transit - New York
L621
8075
8089
L82U9B4000124
L82U9B4000138
15
Greater Toronto Airports Authority - GTAA - Ontario
L616
—
—
L82U4C4500001
L82U4C4500001
1
Clemson Area Transit - South Carolina
L617
—
—
S92U5C4500002
S92U5C4500002
1
Sudbury - Ontario
L632
811
817
L82U9B3000326
L82U4B3000332
7
Saskatoon - Saskatchewan
L618
—
—
S92U1C3000377
S92U1C3000377
1
New York City Transit - New York
L643
5895
5895
S92U1B4000143
S92U1B4000143
1
New York City Transit - New York
L670
5770
5894
S92U9B4000147
S92UXC4500061
125
New York City Transit - New York
L681
5896
5283
S92U2C4500023
S92U9C4500195
122
New York City Transit - New York
L692
5284
5363
S92U3C4500158
S92U3D4500274
80
PAGE 2 OF 8
NQF772001 VERSION 3
INFORMATION LETTER
LI4673E
FOLLOW YOUR INTERNAL SAFETY PROCEDURES.
PROCEDURE
1.1.
Park the vehicle on an even surface with transmission in neutral (N).
1.2.
Turn the ignition switch to OFF position and engage the parking brake.
1.3.
Set the master control switch in the STOP position (see figure 1).
Master control switch in
STOP position
Figure 1 - Master Control Switch in STOP Position
1.4.
Set the battery disconnect switch in the battery compartment to the OFF position (see figure 2).
Battery disconnect
switch in OFF
position
Main power light
turned OFF
Figure 2 - View of Battery Disconnect Switch
PAGE 3 OF 8
NQF772001 VERSION 3
INFORMATION LETTER
LI4673E
CAUTION
Before removing, dismantling or maintaining any electrical component the electrician should take the
necessary precautions to avoid any risk of personal injury or damage to the equipment.
ACCESSING THE +RF0 PANEL
1.5.
Unlock the driver's overhead panel door latches and lower the panel access door (see figure 3).
Access Door Panel
Latch
Latch
Figure 3 - Driver Overhead +RF0 Panel
PAGE 4 OF 8
NQF772001 VERSION 3
INFORMATION LETTER
LI4673E
REMOVING THE AIC3 MODULE
1.6.
Locate the AIC3 module (see figure 4).
1.7.
Disconnect the display connector and the green JAE type connectors.
1.8.
Depending on the vehicle configuration, aslo disconnect the RJ-45 type connector and the Mitsumi USB
type connector.
1.9.
Remove and retain the four screws holding the AIC3 module to the +RF0 panel.
1.10.
Remove the module from the panel.
AIC3 Module
Figure 4 - AIC3 Module Located on the Right Panel Section
INSTALLATION OF AIC4 MODULE
1.11.
Using the previously retained screws, install the AIC4 module PN N76971 at the location where AIC3 was
removed.
1.12.
Reconnect the green connectors to the AIC4 module (reconnect the RJ-45 connector if present).
1.13.
Connect the display adapter cable PN 21816238 between the AIC4 module VGA connection and the display
cable previously disconnected (see figure 5 & 6).
PAGE 5 OF 8
NQF772001 VERSION 3
INFORMATION LETTER
LI4673E
Figure 5 - Display Adapter Cable
USB Connection
VGA
USB Connection
Figure 6 - Rear View of AIC4 Module
NOTE
If a Mitsumi (USB) connector type has been disconnected from AIC3 module then continue with Level 2
procedure using USB adapter cable PN 21875266.
PAGE 6 OF 8
NQF772001 VERSION 3
INFORMATION LETTER
LI4673E
PROGRAMMING THE AIC4 MODULE
1.14.
Program the AIC system using the program and revision shown in the table entitled " AIC programs List" or
the one recommended by your customer support manager. See Section 16: Advanced Information Centre
from your maintenance manual for the programming procedure under the heading "Reprogramming".
AIC program List
CLIENT
ORDER
ROAD NUMBER
FROM
TO
VIN (2NVY/4RKY...)
FROM
TO
QTY
PROGRAMS
St. John - New Brunswick
L272
—
—
S92U483000011
S92U483000011
1
*
St. John - New Brunswick
L273
—
—
S92U383000050
S92U383000050
1
*
Saskatoon - Saskatchewan
L359
—
—
S92U583000289
S92U583000289
1
*
Regina - Saskatchewan
L360
—
—
L82U283000290
L82U283000290
1
*
BC Transit - BCT - British Columbia
L414
9268
9289
L82U983000299
L82U783000320
22
AIC4FW_BCT_S_I
BC Transit - BCT - British Columbia
L417
9290
9297
L82U983000321
L82U183000328
8
AIC4FW_BCT_S_I
Moncton (Codiac) - New Brunswick
L358
358-1
358-1
L82U093000001
L82U093000001
1
*
Moncton (Codiac) - New Brunswick
L361
361-1
361-1
L82U293000002
L82U293000002
1
*
BC Transit - BCT - British Columbia
L430
9301
9318
L82U483000503
L82U483000520
18
AIC4FW_BCT_S_I
BC Transit - BCT - British Columbia
L458
9298
9300
L82U683000521
L82UX83000523
3
AIC4FW_BCT_S_I
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TSB/Document ID: LI4673E
Replacement Service Bulletin Number:
MFR Communication Date: 2020-02-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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