Intermittent Communication Between the TrailerTRACS
Transmitter and the Qualcomm Unit 54-279

FLA COE Century Class Conventional Coronado ightli
FLB COE Argosy COE Business Class M2 Freightliner
FLD Conventional Cargo > Cascadia Service Bulletin
Business Class Columbia 408sD/1148D

FLC 112 Conventional

General Information

On some Cascadia vehicles, communication can be intermittent between the TrailerTRACS transmitter and the
Qualcomm unit. Routing the wiring along the back of the cab will ensure more reliable signal strenth.

Use the instructions in this bulletin to modify the TrailerTRACS wiring.

Parts

Refer to Table 1 for parts required for this repair.

Parts Required
Part Part Number (Quantity
Plug 23-13142-229 1
Connector PAC 12033731 B 4
Fuse, ATC, 5-Amp BUS ATC5 4
Terminal MP630P2S PAC 12020156 L 4
Terminal GT280S PAC 15304719 L. 2
18-Gauge Cable 48-02493-182 20 ft.
Wire Crimp, Solder PHM 1 1861 1
Terminal Seal 23-12497-281 1

Table 1, Required Parts

Work Instructions

1. Shut down the engine and apply the parking brakes. Chock the tires.
2. Access the driver-side wiring harness.

NOTE: There are three possible installations. On vehicles equipped with a driver-side luggage door,
the wiring harness cover is located at the front edge of the luggage compartment. See Fig. 1. On ve-
hicles without a driver-side luggage compartment, the harness is under the side panel located be-
neath the lower bunk. On daycabs, the harness is located behind the rear upholstery panel.
* On Sleepercabs with a driver-side luggage compartment, open the compartment and remove all
stored items. Remove the fasteners from the harness cover, then remove the cover.
© On Sleepercabs without a driver-side luggage compartment, raise the lower bunk and remove the
support panel. Remove the bolt that secures the side panel to the cab floor, then remove the side
panel. See Fig. 2.
* On daycabs, move the driver and passenger seats as far forward and possible. Remove the backwall
upholstery panel and the backwall panel. Support the backwall panel with blocks to gain access to
the Qualcomm wiring. See Fig. 3.
3. Inspect circuit 45 to make sure that the wiring modification has not already been completed. If the proce-
dure was aready performed, circuit 45 will be spliced with an 18-gauge wire and routed as shown in Fig. 5.
if the procedure has not been performed, continue with the next step.

4. Remove the tread plate, kick panel, and lower dash panel from the passenger side of the vehicle. See Fig.
4,

NOTE: See Fig. 5 for the parts required for the wire splice.

Freightliner Service Bulletin, September 2013 Page 1

Intermittent Communication Between the TrailerTRACS
54-279 Transmitter and the Qualcomm Unit

ightli FLA COE Century Class Conventional Coronado
Freightliner FLB COE Argosy COE Business Class M2
Service Bulletin FLD Conventional Cargo > Cascadia
Business Class Columbia 408SD/114SD

FLC 112 Conventional

5. Measure and cut enough 18-gauge wire to extend from the driver-side wall under the bunk to the
passenger-side wall, and under the passenger-side kick panel to the Qualcomm ECU connector under the
dash.

6. Feed the wire through the fuse holder. Strip the wire, then crimp on the fuse holder terminal end.

03/26/2013
1. Harness Cover

Fig. 1, Driver-Side Luggage Compartment without
Auxiliary Heater Option (Sleepercab)

04/02/2013
1. Side Panel

Fig. 2, Under Bunk Side Panel Removal
7. Cut a 4 to 6 inch (10 to 15 cm) strand of wire.

8. Feed the short strand of wire through the fuse holder. Strip the wire on both ends, then crimp on the fuse
holder terminal end.

9. Inside the cab, cut and strip the circuit 45 blue wire.
10. Splice the new wire into circuit 45. See Fig. 6.
10.1 Slide a butt connector onto the the end of circuit 45 that leads to the SAM Chassis.
10.2 Slide the new wire and the other end of circuit 45 into the opposite end of the butt connector.
10.3 Crimp each end of the butt using a crimp tool to secure the wires. See Fig. 7.
10.4 Pull test the wires by hand to ensure the crimp is mechanically solid.

10.5 Heat the splice using a heat gun rated at 1,000°F (538°C) until the sleeve has completely shrunk
against the wire and the solder inside the butt connector flows.

Page 2 Freightliner Service Bulletin, September 2013

Intermittent Communication Between the TrailereTRACS
Transmitter and the Qualcomm Unit

54-279

FLA COE Century Class Conventional Coronado

FLB COE Argosy COE Business Class M2
FLD Conventional Cargo > Cascadia
Business Class Columbia 108SD/1148D

FLC 112 Conventional

Freightliner
Service Bulletin

04/09/2013
1. Tread Plate
2. Kick Panel

06/12/2013 546039

A. Circuit 45 can be accessed once the cab backwall
is lifted off of the cab floor.

1. Support Blocks

2. Cab Backwall

Fig. 3, Support the Cab Backwall with Blocks (daycabs)
11. Route the wire to the Qualcomm ECU.

Fig. 4, Passenger-Side Tread Plate and Kick Panel

11.1. On Sleeper cabs, route the wire underneath the bunk along the bunk support wall and underneath

the floor mat.
On daycabs, route the wire along the cab backwall.

NOTE: On Sleepercabs with a driver-side luggage compartment, the wire needs to be routed

along the cab wall, underneath the harness cover.

11.2 On Sleepercabs, route the wire behind the passenger side B-pillar panel and under the harness

cover using fish tape or a wire guide. See Fig. 8.

On daycabs, feed the wire underneath the passenger-side harness cover. See Fig. 9.

11.3. Strip the wire end and crimp on terminal 23-13212-120 with seal 23-12497-281.

Freightliner Service Bulletin, September 2013

Page 3

Intermittent Communication Between the TrailerTRACS
54-279 Transmitter and the Qualcomm Unit

i i FLA COE Century Class Conventional Coronado
Freig htliner . FLB COE Argosy COE Business Class M2
Service Bulletin FLD Conventional Cargo > Cascadia

Business Class Columbia 108SD/114SD_

FLC 112 Conventional

oto: . . . " 1546015
1. Fuse Holder Housing (23-13302-800) 5. Butt Connector with Solder (phm 1 1861)

2. Fuse, 5-Amp 6. 18-Gauge GXL Wire

3. Fuse Terminal (23-13213-460) 7. Terminal Seal (23-12497-281)

4. Fuse Holder (23-13142-229) 8. Terminal End for Wire 376C4 (23-13212-120)

Fig. 5, Wiring Modification Parts

12. Disconnect the 14- or 16-pin Qualcomm ECU connector. It is located on the passenger-side of the vehicle,
behind the kick panel. See Fig. 10.

13. Remove wire 376C4 (orange) from the Qualcomm connector. Refer to module 330 for terminal details. Ter-
minate the wire by adding shrink tubing to the end of the wire. Heat the tubing using a heat gun rated at
1,000°F (538°C) until the sleeve has completely shrunk against the wire.

14. Insert the new wire into the Qualcomm connector in the same cavity where wire 376C4 was connected. See
Fig. 11.

15. Tape down the new wire along the inner bunk support, along the cab wall and the passenger-side door
frame. See Fig. 12.

16. Install the kick panel, tread plate, and lower dash panel on the passenger-side of the vehicle.
17. On Sleepercabs, install the harness cover on the driver side of the vehicle.

Page 4 Freightliner Service Bulletin, September 2013

Intermittent Communication Between the TrailerTRACS
Transmitter and the Qualcomm Unit 54-279

FLA COE Century Class Conventional Coronado ightli

FLB GOE Argosy COE Business Class M2 Freightliner
FLD Conventional Cargo > Cascadia Service Bulletin
Business Class Columbia 108SD/114SD

FLC 112 Conventional

A

03/26/2013 : : ~ 548010" Ay
A. Circuit 45 inserted into the butt connector with the

new 18-gauge wire.
1. Circuit 45
2. Wire to Circuit 45 from the Fuse Holder 08/03/2010 1545671
3. Wire to Qualcomm ECU 7 a 5,
4. Fuse Holder A The crimp tool must have a minimum 3/16-inch

Fig. 6, Wire Re-Routed to Qualcomm ECU Fig. 7, Crimp Tool

18. On daycabs, remove the support blocks, then install the backwall panel, and the upholstery panel.

Freightliner Service Bulletin, September 2013 Page 5

Intermittent Communication Between the TrailerTRACS
54-279 Transmitter and the Qualcomm Unit

Freightliner FLA COE Century Class Conventional Coronado

. . FLB COE Argosy COE Business Class M2
Service Bulletin FLD Conventional Cargo > Cascadia
Business Class Columbia 108SD/114SD

FLC 112 Conventional

04/02/2013 1546017

1. Passenger Seat 3. 18-Gauge Wire
2. Harness Cover 4. Wire Guide

Fig. 8, Passenger-Side Wire Routing (tread plate removed)

Page 6 Freightliner Service Bulletin, September 2013

Intermittent Communication Between the TrailerTRACS

Transmitter and the Qualcomm Unit

54-279

FLA COE Century Class Conventional Coronado ightli

FLB COE Argosy COE Business Class M2 Freightliner
FLD Conventional Cargo > Cascadia Service Bulletin
Business Class Columbia 108SD/1148D

FLE 112 Conventional

06/12/2013 "1546038,

Fig. 9, Wire Fed into the Passenger-Side Harness
Cover (daycabs)

06/13/2013 1546011

1. Qualcomm Connector
2. Cab Wall

Fig. 10, Qualcomm Connector

Freightliner Service Bulletin, September 2013

Page7

54-279

Freightliner
Service Bulletin

Intermittent Communication Between the TrailerTRACS

Transmitter and the Qualcomm Unit

FLA COE Century Class Conventional Coronado

FLB COE Argosy COE Business Class M2
FLD Conventional Cargo > Cascadia

Business Class Columbia 1088D/114SD

FLC 112 Conventional

06/13/2013

1. New 18-Gauge Wire

Fig. 11, Qualcomm Connector Wire Location

1546012 a
04/02/2013 1546016
4. Bunk 4. Floor Insulation
2. Electrical Tape 5. Floor Mat
3. 18-Gauge Wire 6. Auxiliary Heater

Fig. 12, Wire Routing Under Bunk (auxiliary heater
installation shown)

Page 8

Freightliner Service Bulletin, September 2013

Intermittent Communication Between the TrailerTRACS

Transmitter and the Qualcomm Unit 54-279

FLA COE Century Class Conventional Coronado i i

FLB COE Argosy COE Business Class M2 Freightliner
FLD Conventional Cargo > Cascadia Service Bulletin
Business Class Columbia 108SD/114SD

FLC 112 Conventional

Warranty

This procedure is warrantable only if the described condition exists and the repair is performed within the appli-
cable base or extended coverage warranty period. If a failure is not found, this procedure is considered preven-

tive and warranty does not apply.

Normal warranty applies. See Table 2 for QuickClaim damage code and labor allowance information. Refer to
this service bulletin by number at the beginning of the claim comments. See Table 3 for OWL VMRS codes and

labor allowance information. Enter this service bulletin number in the Service Bulletin # field.

QuickClaim Damage Code and Labor Allowance
Damage Code SRT Code Description Time: Hours
996-0896A | Qualcomm, TrailerTRACS, Inspect and Rewire 08
786-000A04600 996-0896B | Qualcomm, TrailerTRACS, Inspect 03
Table 2, QuickClaim Damage Code and Labor Allowance
OWL VMRS Codes and Labor Allowance
Primary Failed Part Component Cause Code | SRT Code Description Time: Hours
Qualcomm, 12 996-0896, Qualcomm, TrailerTRACS, Inspect and 08
TrailerTRACS 051-008-008
12 996-0896B | Qualcomm, TrailerTRACS, Inspect 0.3
Table 3, OWL VMRS Codes and Labor Allowance
Page 9

Freightliner Service Bulletin, September 2013