Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
IK1900198
Service Bulletin/Repair Instructions
This article only applies to Models w/ 0016UZL Built Between 06/23/2014 – 05/11/2020 OR Models w/ 0016UZL w/ Safety Recall 14516 Completed Reference the appropriate Technician Manual for models outside of this population. Safety Recall 14516 has been issued for units built before June 23, 2014. For LT and 2018+ LoneStar: If there is a complaint of the bunk blower turning off after an auto start event, the BCM needs to be updated to Data Version 323 or higher. • The bunk blower turning off was only present in BCM Data Version 309 to Data Version 322 To properly diagnose the system, you must ensure the recall has been performed. Only the "Cold Loop" sealed refrigerant core PN # 2614669C1 is to be replaced when the refrigerant circuit fails. DO NOT REPLACE THE COMPLETE UNIT IF THE A/C IS NOT FUNCTIONING. Complete unit is not Warrantable Refer to the BASIC TROUBLESHOOTING below before replacing any components. This will help you identify which component is at fault or any electrical issues. Refer to PARTS INFORMATION to properly identify the parts that may require replacement The A/C portion of the system is listed below in the parts section. The 16UZL No-Idle HVAC system is designed to disengage when the engine is started, and can be turned on with the key in any position. This battery-powered no-idle HVAC system provides heating and cooling of the sleeper area without use of the vehicle engine. The system is comprised of the no-idle HVAC components located in the sleeper HVAC module, a separate fuel-operated coolant heater mounted under the sleeper, and four additional batteries housed in a second battery box. The no-idle HVAC system shares the air handling assembly and several major components with the truck's standard HVAC system. Most importantly, the shared evaporator core contains refrigerant circuits for both the no idle system and the truck's standard A/C system. With this configuration, some procedures required to service the no idle A/C system will require opening the refrigerant circuit of the truck's standard A/C system. Trucks equipped with the 16UZL No-Idle HVAC system have two separate HVAC systems (Standard Truck A/C and the MaxxPower unit); it is important to identify each clearly, so you are troubleshooting the correct system. Per the Operator's Manual page 10: Run the heater at least once a month during the year (for a minimum of 15 minutes).
IK2600090
Other
New CARB Idle Reduction Change Request
IK4300035
Service Bulletin/Repair Instructions
This tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files. It allows users to quickly load files either manually or directly from the Diamond Logic Builder Vehicles folder using VIN-based selection. As files are added or removed, the comparison runs automatically with no manual action required. The program presents results in an interactive table that shows feature codes, descriptions, access levels, and whether each feature is present in each selected file. Built-in search, filtering, and sorting make it easy to locate specific features or focus only on differences between files. Column visibility can be customized to show or hide descriptions and access information as needed. Users can remove files individually or clear all files at once, with results updating instantly. The tool also includes reporting and export options that reflect exactly what is visible on screen, allowing results to be printed, copied, saved as text, or exported to CSV for use in Excel or other spreadsheet tools. Overall, the program streamlines the process of comparing vehicle feature configurations, helping users quickly identify differences, validate setups, and document results without manual comparison or external tools.
IK2600255
Other
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature. Customer requested changes will be approved in accordance with the requirements specified in 40 CFR Part 1037 to ensure continued compliance with greenhouse gas (GHG) regulations.
IK2600047
Service Bulletin/Repair Instructions
Engine replacements for all International engines will need to follow this procedure.
IK1600272
Service Bulletin/Repair Instructions
This document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and windshields using an ultrasonic sound detector.
IK0600030
Service Bulletin/Repair Instructions
This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes. (Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)
IK2200119
Service Bulletin/Repair Instructions
IC Bus Operator's Manuals
IK1201009
Service Bulletin/Repair Instructions
In some geographic areas, ambient temperatures reaching below 15°F (-10 °C), including high levels of humidity, an operator may experience engine stalling, low performance, and or poor aftertreatment performance. This is caused by condensation accumulating and freezing within the Charge Air Cooler (CAC); affecting air flow into the engine. This article lists all the currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
IK3400001
Service Bulletin/Repair Instructions
Title: Service Portal iKNow Feedback Case Types Applies To: All
IK1400005
Service Bulletin/Repair Instructions
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
IK1900022
Service Bulletin/Repair Instructions
Title: A/C Refrigerant and Oil Capacities Applies To: All current models
IK0900157
Service Bulletin/Repair Instructions
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
IK0500054
Service Bulletin/Repair Instructions
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
IK2600069
Service Bulletin/Repair Instructions
Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
IK1400023
Service Bulletin/Repair Instructions
This article addresses chassis lean conditions on all chassis. This does not include any diagnostics for body leans such as a cab lean. Keep in mind that a chassis lean may cause or accentuate a cab lean. Filling out the printable form and using the notes in blue will help you to determine the source of the lean and identify the action and parts required to correct the lean.
IK0200013
Service Bulletin/Repair Instructions
Suggested alignment target values when performing a vehicle axle alignment.
IK0800351
Service Bulletin/Repair Instructions
J1939 Data Link Source Address Information
IK0300010
Service Bulletin/Repair Instructions
Diagnosis of chassis wander complaints.
IK0400040
Service Bulletin/Repair Instructions
General Wheel Speed Sensor Troubleshooting
IK2200109
Service Bulletin/Repair Instructions
Bus seat back foam inspection guidelines
IK1201457
Service Bulletin/Repair Instructions
Cummins B6.7 Grid Heater Relay
IKo800080
Service Bulletin/Repair Instructions
J1939 Data Link Troubleshooting
IK0700120
Service Bulletin/Repair Instructions
QLS Emergency Calibration Revert Process
IK1200101
Service Bulletin/Repair Instructions
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
IK0800554
Service Bulletin/Repair Instructions
Telematics installation guidelines - Only units with 500K data link
IK0800407
Service Bulletin/Repair Instructions
Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI engines or Cummins ISB engine with Allison transmissions
IK0700115
Service Bulletin/Repair Instructions
QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
IK1201472
Service Bulletin/Repair Instructions
Pico Scope CCOS (Crankcase Separator Test)
IK0800607
Service Bulletin/Repair Instructions
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
IK0800609
Service Bulletin/Repair Instructions
PicoScope Test for Datalink (CAN) Health Shorts & opens
IK0800610
Service Bulletin/Repair Instructions
PicoScope Test Resistance and Ohmmeter
IK1201469
Service Bulletin/Repair Instructions
PicoScope Test One Channel RCT
IK0400046
Service Bulletin/Repair Instructions
WABCO Full Power Brake Diagnostic Code (DTC) Index
IK0800080
Service Bulletin/Repair Instructions
J1939 Data Link Troubleshooting
IK1000003
Service Bulletin/Repair Instructions
Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
IK2600251
Service Bulletin/Repair Instructions
How to obtain As built parameter list
IK0400028
Service Bulletin/Repair Instructions
How to program parameters after changing WABCO FPB ECU (Parking brake shows N/A)
IK2600254
Service Bulletin/Repair Instructions
New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
IK1201299
Service Bulletin/Repair Instructions
Engine Oil Capacities. All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines
IK0700112
Service Bulletin/Repair Instructions
Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
IK1500074
Service Bulletin/Repair Instructions
Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
IK0800504
Service Bulletin/Repair Instructions
Repair Procedures for Vehicles Struck by Lightning
IK2200149
Service Bulletin/Repair Instructions
This article is for adding additional protection to the driver's area of the bus to help mitigate the transmission of germs.
IK0800475
Service Bulletin/Repair Instructions
Radio Diagnostics and Information
IK2200088
Service Bulletin/Repair Instructions
Factory Installed Air Conditioning, EC4.0 System operating instructions and the service manual
IK2200001
Service Bulletin/Repair Instructions
Bus Air Conditioning Service Contacts for HVAC Information
IK1600258
Service Bulletin/Repair Instructions
Cleaning and Disinfecting Trucks and Buses
IK1201398
Service Bulletin/Repair Instructions
ISB 6.7 Frequent Regeneration
IK2200026
Service Bulletin/Repair Instructions
Sound Off Bus Monitor Lamps Not Illuminating While Circuits and Exterior Lights are Operating and Test Good
IK0700097
Service Bulletin/Repair Instructions
NEW Ultrasonic DEF Head Unit; All SCR vehicles
IK1201389
Service Bulletin/Repair Instructions
Cummins ISB Fan Drive Belt Chirp; Cummins ISB and Cummins B6.7
IK0700079
Service Bulletin/Repair Instructions
SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
IK0800484
Service Bulletin/Repair Instructions
Voltage gauge drops on cold engine start-up; Only models built with Cummins ISB, B6.7, ISL, or L9 engines
K1200716
Service Bulletin/Repair Instructions
Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure
IK2200116
Service Bulletin/Repair Instructions
Bus Door Adjustment procedure for Electric and Air; only models built 09/15/11 or later
IK0900077
Service Bulletin/Repair Instructions
Fuel Fired Engine Coolant Heaters
IK0800503
Service Bulletin/Repair Instructions
ISB Starting System Diagnostics; Only models built with cummins ISB engines
IK0800564
Service Bulletin/Repair Instructions
Child Checkmate is not functioning correctly; Only buses with features 47EXC, 47EXD, 47EXE built from 4/18/16 to 5/15/17
IK0800445
Service Bulletin/Repair Instructions
Body Controller Updates for 500k Baud data link
IK2600007
Service Bulletin/Repair Instructions
How to Get from History and Program a BCM or ESC; only models equipped with a BCM or ESC
IK2600215
Service Bulletin/Repair Instructions
Applying Advanced Logic Templates; only models equipped with a BCM or ESC
IK2200143
Service Bulletin/Repair Instructions
Diagnosis and repair of intermittent operation of the Child Checkmate reset button.
IK1201360
Service Bulletin/Repair Instructions
Cylinder Performance Analyzer (CPA) Resource Center
IK1500093
Service Bulletin/Repair Instructions
Cummins L9 EPA 17 Supplemental Fuel System Diagnostics - Racor Chassis Mounted Fuel Filter / Cummins fault 559
IK0700106
Service Bulletin/Repair Instructions
DEF Tank Nozzle Insert; only models with SCR systems
IK2200139
Service Bulletin/Repair Instructions
Driver?s seat belt tongue button; Only with Seat Belt Part numbers 4091405c1 thru 4091408c1
IK2500511
Service Bulletin/Repair Instructions
Using Supplier Software to Check DTCs
IK2200087
Service Bulletin/Repair Instructions
Bus Entrance Door Adjustment Procedures; only models built prior to 9/15/2011
IK0400155
Service Bulletin/Repair Instructions
IC Bus Service Brake Switch Inspection; only models with Hydraulic Brakes
IK0400154
Service Bulletin/Repair Instructions
Hydraulic Brake System Park Brake Inspection and Adjustment Procedures; only models with Hydraulic Brake system equipped with 04GBJ Park Brake
IK0700096
Service Bulletin/Repair Instructions
Urea Quality Sensor (UQS) Supplemental Diagnostic and Service Information; only models with SCR Aftertreatment system and N9, N10, N13, A26 or Cummins ISB, ISL, ISX engines built from January 2016
IK0800546
Service Bulletin/Repair Instructions
HVAC fault 2609-19 with 4th Gen BCM; Only models equipped with 4th generation BCM
IK2600008
Service Bulletin/Repair Instructions
How to Diagnose Electrical Problems with Diamond Logic Builder; only models equipped with a BCM or ESC
IK1201359
Service Bulletin/Repair Instructions
Breather Filter and Crankcase Tube Freezing Issue in Below Freezing Temperatures; only models with Cummins ISB 6.7 and QSB 6.7