2011 Kenworth T680 TSBs
24 Technical Service Bulletins across 10 categories
Categories
Electrical
8 bulletinsInformation Only C hassis equipped with MY2021 B EPA emission s standards will be shipped through atleast ...
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the end of the 2021 calendar year without particulate matter (PM) sensors installed .
Non-Safety Campaign Chassis with the City Horn option may generate unexpected alerts.
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A VECU software update is available to resolve the issue.
Non-Safety Campaign The batteries may drain quickly due to the VECU not going to sleep.
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Updated VECU software is available to resolve the issue.
Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the...
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appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
Information Only Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead...
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to water intrusion and corrosion in some vehicles.
Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
Information Only: The AutoStart System Test does not recognize the hood opening and closing when running the test on a...
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model 579 or 567 chassis equipped with a VECU software version 9.8 and 9.9. The issue will be fixed on a future VECU software update. This bulletin will be updated when the resolution is available.
Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
Engine
3 bulletinsCertain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual gauge may...
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display incorrect restriction levels. The virtual gauge will be temporarily disabled until a revised sensor strategy is developed.
T680 predictive cruise control(PCC) incompatibility with cummins engine.
Fix-As-Fail The evaporator core may crack in vehicles with the ISX-15 engine.
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An improved suction line has been released that removes stress transferred to the evaporator core.
HVAC & Climate
3 bulletinsInformation Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the...
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A/C compressor.
Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent...
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changes in fan speed that can be remedied with an updated HVAC software.
FIX-AS-FAIL: AN INTERNAL ISSUE MAY CAUSE SOME HVAC MODE DOOR ACTUATORS TO FAIL.
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THIS WILL CAUSE THE HVAC SYSTEM TO ACT ERRATICALLY OR CONSTANTLY TURN ON AND OFF.
Other
2 bulletins"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes.
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2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
Body & Paint
2 bulletinsInformation Only Windshield washer pumps have a high No Trouble Found rate.
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Washer pumps may fail to spray due to a clogged filter.
Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
Transmission
2 bulletinsTech Tip concerning Pushbutton Shift Selector on Kenworth and Peterbilt Trucks will skip the oil level check and proceed...
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to Prognostics
Tech Tip concerning Pushbutton Shift Selector on Kenworth and Peterbilt Trucks will skip the oil level check and proceed...
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to Prognostics
Brakes
1 bulletinCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume...
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requirements per FMVSS/CMVSS 121 Air Brake Systems. This bulletin will be updated when repair parts and procedures are available.
Software & Calibration
1 bulletinInformation Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer.
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The issue can be temporarily resolved using any one of the included procedures.
Pre-Delivery & Maintenance
1 bulletinInformation Only This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke...
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Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
Lighting
1 bulletinInformation only - Customer installed inverters may be wired incorrectly.