NHTSA ID Number: 10200211
Manufacturer Communication Number: PI 0859-03
TSB/Document Date: 2021-08-09
Summary
Certain MACK
CHU, CXU, and GU trucks built between 11/11/2013 and 01/14/2015, equipped with front radar may experience loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.
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TSB/Document ID: PI 0859-03
Replacement Service Bulletin Number:
MFR Communication Date: 2016-01-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Service Program
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
This Service Program replaces PV729–PI0859, “Front Radar, Failure
(USA72879)” dated 10.2015.
Date
Group
No.
Release
Page
1.2016
366
859
03
1(19)
Front Radar, Failure
CHU, CXU, GU
PI0859, Front Radar, Failure
(January 2016)
Certain MACK CHU, CXU, and GU trucks built between 11/11/2013 and 01/14/2015,
equipped with front radar may experience loss of front object detection or erratic operation of
cruise control functions. The terminal seals of the harness is allowing moisture and corrosion
to build up in the front radar harness. To ensure proper operation of the front radar, the
harness is inspected for the proper seal and/or corrosion. If the harness or seal fail
inspection, replacement of the harness is required. Follow the inspection and repair
procedures outlined in this document.
If the truck is eligible for this repair, call 1-877-986-5862 and provide the following information:
17 digit Vehicle Identification Number (VIN), Product Improvement Number (PI0859), Dealer
Code, and the Purchase Order (PO) Information.
Note: This bulletin does not apply to MACK Trucks Australia.
W3109331
Required Parts
Front Radar Replacement Parts
PV729-PI0859
Item
Description
Part Number
Qty
1
Harness, Front Antenna
22638506
1
2
Clamp, Universal
20428158
3
3
Cable Tie
980464
2
USA74318
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
Decommissioning the Truck for Repair
You must read and understand the precautions and guidelines in Service Information,
group 30, "General Safety Practices, Electrical" before performing this procedure. If you
are not properly trained and certified in this procedure, ask your supervisor for training
before you perform it.
NOTE: Information is subject to change without notice. Illustrations are used for reference
only and can differ slightly from the actual vehicle being serviced. However, key
components addressed in this information are represented as accurately as possible.
1 Park the vehicle on a flat and level surface.
2 Apply the parking brake.
3 Place the transmission in neutral or park.
4 Install the wheel chocks.
W7086748
Page
2(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
5 Disconnect all of the cables from the battery’s negative terminals.
W3086747
Front Radar Inspection
1 Disconnect the radar connector.
W3103584
Page
3(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
2 Inspect the radar connector for water intrusion and corrosion on the terminal pins.
Note: If there are signs of water intrusion, corrosion of the harness , continue to page 5
(Front Radar Harness Replacement) section and follow the replacement procedure.
3 Inspect the harness to determine if the proper seal was installed in the connector housing.
Note: If the color of the terminal seals are (BLACK) , connect the radar connector, and no
further action is required. Continue to page 18, (Commission the truck for Operation),
and follow steps 1 – 2.
Note: If the color of the terminal seals are (YELLOW), continue to page 5, (Front Radar
Harness Replacement) and replace the harness.
W3103448
4 If corrosion is found in the front radar module, clean the connector pins with contact
cleaner to remove any trace of corrosion or debris. If corrosion is present after cleaning,
create and submit an e-Service case with attached photos to determine if the front radar
module requires replacement.
Page
4(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
Front Radar Harness Replacement
1 Open the hood.
W8090572
2 Remove the fasteners and flat washers securing the front radar sensor and shroud.
Note: Store the flat washers, and fasteners in a clean and secure location for installation.
W3103585
Page
5(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
3 Remove the front radar sensor, spacers, and shroud.
Note: Store the front radar sensor, spacers, and shroud in a clean and secure location for
installation.
W3103588
4 Remove the cable ties securing the front radar harness.
5 Disconnect the front radar harness from the main cab harness.
W3103450
Page
6(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
6 Remove the existing front radar harness.
Note: Note the routing of the existing harness for installation of the replacement harness.
7 Route the replacement front radar harness into position as noted.
8 Connect the replacement front radar harness to the main cab harness.
W3103450
9 Use the cable ties listed on page 1 to secure the front radar harness.
Note: Ensure there is enough harness at the other end to connect to front radar sensor.
10 Position the front radar sensor, spacers, and shroud.
W3103588
Page
7(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
11 Install the fasteners and flat washers securing the front radar sensor and shroud.
W3103585
12 Tighten the fasteners securing the front radar sensor and shroud to 27 ± 4 Nm (20 ± 3 ftlb).
13 Connect the front radar harness to the radar module.
W3103584
Page
8(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
14 Close the hood.
W8090584
15 Continue to page 18, and (Commission the truck for Operation).
Front Radar and Harness Replacement
1 Open the hood.
W8090572
Page
9(19)
Mack Trucks, Inc.
Service Program
Date
1.2016
Group
No.
Release
366
859
03
2 Remove the fasteners and flat washers securing the front radar sensor and shroud.
Note: Store the flat washers, and fasteners in a clean and secure location for installation.
W3103585
3 Remove the front radar sensor, spacers, and shroud.
Note: Return radar assembly to the Core Hub for credit and processing.
Note: Store spacers and shroud in a clean and secure location for installation.
W3103588
Page
10(19)
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