NHTSA ID Number: 10120472
Manufacturer Communication Number: sbw5462
TSB/Document Date: 2017-10-21
Summary
sbw5462 Aftertreatment Harness Modification
54-62
Aftertreatment Harness Modification
Constellation
Heritage
> 4700 Models
> 4800 Models
Western Star
Service Bulletin
> 4900 Models
> 6900 Models
General Information
EPA10 vehicles with a Detroit 1-Box aftertreatment device may experience engine-induced derate. If the MIL
light illuminates, and the derate occurs in conjunction with engine-related fault codes, this condition may be due
to wear or damage to the aftertreatment electrical harness. Use the instructions in this bulletin to inspect, and if
necessary, replace the harness.
New service harnesses are available for EPA10 vehicles with Detroit 1-Box aftertreatment devices. The new
harnesses feature friction tape and heat sleeves, instead of corrugated conduit. These harnesses also have additional length, to allow them to be routed along the back-of-cab crossmember.
EPA10 vehicles built before March 5, 2012, and equipped with a Detroit 1-Box aftertreatment device, require a
single harness part number A66-02790-000 to replace factory installed ACM and DEF wiring on the chassis.
Vehicles built on or after March 5, 2012 use part number A66-02790-001. Vehicles equipped with a 6-gallon
DEF tank also require harness part number A66-02790-002 to adapt the 6-gallon tank to the main -000 or -001
harness.
Parts
See Table 1 for a list of parts required for this procedure.
Part Number
A66-02790-000
A66-02790-001
A66-02790-002*
23-13482-005
TYC DCT110HIR
23-12069-001
23-13481-000
Parts
Description
Harness, vehicles built before March 5, 2012
Harness, vehicles built on or after March 5,
2012
Harness, vehicles with a 6-gallon DEF tank
Tie Strap, Fir-Tree
Cable Tie, Dual-Clamp
Cable Tie, Nylon
Tie Strap, Push-On
Figure
—
—
—
Fig. 3
Fig. 4
Fig. 6
Fig. 7
* This harness is installed with the harness listed above, based on build date.
Table 1, Parts
Work Instructions
1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
2. Inspect the aftertreatment harness.
2.1
Check the harness around the area of the frame rail, the crossmember, and the air lines.
2.2
Make sure that the harness is not worn through, and that the wires are not expose or damaged.
2.3
If the harness is damaged, continue with these instructions.
3. Disconnect the batteries.
4. Disconnect the harnesses from the ACM and the DEF tank, then remove the harnesses.
5. Route the new aftertreatment harness. See Fig. 1. Make sure that there is no contact with sharp edges.
See Fig. 2 and Fig. 3.
6. Secure the harness away from the air lines using part number TYC DCT110HIR. See Fig. 4.
Western Star Service Bulletin, November 2014
Page 1
54-62
Aftertreatment Harness Modification
Western Star
Service Bulletin
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900 Models
> 6900 Models
7. Loop any excess harness and secure. See Fig. 5.
8. Secure the harness in the crossmember, including any excess, using nylon cable ties, part number 2312069-001. See Fig. 6.
9. Secure the harness at the DEF tank and the pump brackets using part number 23-13481-000. See Fig. 7.
Allow enough slack to account for transmission movement. See Fig. 8.
Warranty
This procedure is warrantable only if the described condition exists and the repair is performed within the applicable base or extended coverage warranty period. If a failure is not found, this procedure is considered preventive and warranty does not apply.
Normal warranty applies. See Table 2 for OWL VMRS codes and labor allowance information. Enter this service
bulletin number in the Service Bulletin # field.
Primary Failed Part
A66-02790-000 or
A66-02790-001
OWL VMRS Codes and Labor Allowance
Component
Cause Code SRT Code
Description
Code
043-006-010
08
Time: Hours
28F-5005A Aftertreatment Harness, Modification
1.2
Table 2, OWL VMRS Codes and Labor Allowance
A
10/13/2014
f546101
A. Harness routing, with a finger-length width from the
frame.
Fig. 2, Aftertreatment Harness Routed Along the Frame
A
B
10/16/2014
f546103
A. EPA10 Service Harness Routing.
B. EPA10 Factory Harness Routing.
Fig. 1, Aftertreatment Harness Routing
Page 2
Western Star Service Bulletin, November 2014
54-62
Aftertreatment Harness Modification
Constellation
Heritage
> 4700 Models
> 4800 Models
Western Star
Service Bulletin
> 4900 Models
> 6900 Models
A
A
10/13/2014
f546098
A. Harness secured away from the air line using dualclamp cable ties, part number TYC DCT110HIR.
Fig. 4, Secure the Harness
10/08/2014
f546095
A. There must be at least a finger width between the
harness and the frame.
Fig. 3, Aftertreatment Harness Installed Away from the
Frame
10/13/2014
f546097
Fig. 5, Excess Harness Secured
Western Star Service Bulletin, November 2014
10/13/2014
f546099
Fig. 6, Harness Secured in the Crossmember with
nylon Cable Ties, Part Number 23-12069-001
Page 3
54-62
Aftertreatment Harness Modification
Western Star
Service Bulletin
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900 Models
> 6900 Models
A
A
10/13/2014
f546100
A. Use push-on tie straps, part number 23-13481000, to secure the harness.
Fig. 7, Harness Secured at the DEF Tank
Page 4
10/13/2014
f546102
A. Allow enough slack to account for transmission
movement.
Fig. 8, Securing Excess Harness
Western Star Service Bulletin, November 2014
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TSB/Document ID: sbw5462
Replacement Service Bulletin Number:
MFR Communication Date: 2014-11-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT ADAPTIVE/MOBILITY
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