Applicable Vehicles
All, 2015 to 2018, Freightliner M2 trucks.
Symptoms
SPN 879 or 881 FMI 6 Active Fault Codes.
Issue
SPN 879 FMI 6 Fault Code in Service Literature described as Front Left Turn Lamp – Current above expected value, and is associated with CHM C3-N pin.
There is another pin, CHM C1-N on Chassis Module, that is progra
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Applicable Vehicles
Freightliner New Cascadia vehicles equipped with Holland air sliding 5th wheels (Family Data Code 578-A02) and frame rail web mounted ramps.
Build dates between 01/01/2019 and 07/01/2023
Symptoms
On certain tractor configuration vehicles, when the 5th wheel is slid aft, there is potential for the 5th wheel top plate to contact the 5th wheel ramps. This interference re
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SYMPTOMSABS light on, loss of battery power to ABS, Blown 10A DLU (data logger unit) fuse in auxiliary PDM.APPLICABLE VEHICLES24U Coronado with p/n 06-41905-000 Auxiliary PDMISSUENormally, ABS battery power is supposed to be supplied via the 15A fuse in the F1 position of the auxiliary PDM labeled as "ABS BAT1".It has been discovered that some auxiliary PDM schematics incorrectly show 15A fuse F1
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FTL New Cascadia
Symptoms
Window Regulator Motor Stop Working or Operates Intermittently in Driver Side / Passenger Side or both sides.
Issue
The window regulators motors are not designed to be run continuously. The window regulator motors have a thermal cutoff. If they are run long enough, there will eventually be an open circuit and get a fault code. It would stop all the way up or all
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Applicable Vehicles
All P4 Vehicles
Symptoms
Fuel gauge reads empty.
Issue
Fuel sending connector detached/unplugged.
Solution
Tie strap fuel sending unit on the plug locking tab to prevent disconnection (See Figure 1)
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Applicable Vehicles
All Cascadia (P3) daycab and sleeper cab
Symptoms
N/A
Issue
There is a severe supply constraint on the main HVAC controller, A22-60645-101. An electronic component is no longer available to manufacture the main HVAC controller. Part supplies are extremely limited, and there are no alternative parts.
As information is gathered to identify reasons that the HVAC controller i
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Applicable Vehicles:
All Freightliner and Western Star vehicles that use the backup light switch P/N POL 21 465, POL 21 465P, POL 21 566 or POL 21 566PF (typically manual transmissions) built up to March of 2019 can be affected.
Symptoms:
Backup lights and if equipped with a backup alarm, may not function when the vehicle is shifted into reverse.
Issue:
The ba
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Diesel Exhaust Fluid (DEF) systems are critical for reducing emissions in modern diesel engines, particularly in semi-trucks. Here’s an overview of how these systems work:
Components of a DEF System
A DEF system typically includes the following components:
DEF Tank: Stores the DEF, which is a mixture of 32.5% urea and 67.5% deionized water.
DEF Pump: Moves the fluid from the tank to th
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Applicable VehiclesAll vehicles equipped with a bulkhead module (BHM).SymptomsScenario 1: Technician updates the Features in ServiceLink, then Flashes the BHM, while in "connected Online" mode (see attachment below). This has been confirmed to put the BHM in "Boot Block" (the programming / flashing attempt fails and will not allow you to reattempt).May also be seen as ServiceLink Error
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Applicable Vehicles
M2 106-112 with LED Headlamps
Symptoms
LED Headlamp Failures caused by water / moisture ingress
Issue
Most of the LED Headlamp failures are due to water/moisture ingress. The root cause was identified during inspection and testing of returned failed parts. The connector seal of the Turn - Parking Lamp part of the HARN-LT TRN,OL,CHAS was not installed at the productio
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