2014 Ic Bus Casb TSBs
206 Technical Service Bulletins across 17 categories
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50 bulletinsIC Bus Operator's Manuals
This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes.
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(Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
J1939 Data Link Source Address Information
Diagnosis of chassis wander complaints.
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
J1939 Data link source address information
Pico Scope CCOS (Crankcase Separator Test)
PicoScope Test One Channel RCT
PicoScope Test Resistance and Ohmmeter
PicoScope Test for Datalink (CAN) Health Shorts & opens
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
How to obtain As built parameter list
Driveline Information Center and Troubleshooting Procedures
Cleaning and Disinfecting Trucks and Buses
J1939 Data Link Troubleshooting
J1939 Data Link Source Address Information
SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
Diagnosis and repair of intermittent operation of the Child Checkmate reset button.
Geotab with WYE Cable Installation; only models equipped with OnCommand Connection
DEF Tank Nozzle Insert; only models with SCR systems
Breather Filter and Crankcase Tube Freezing Issue in Below Freezing Temperatures; only models with Cummins ISB 6.7 and...
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QSB 6.7
Horn Sounds On Its Own While Vehicle Parked - OR - Horn Inoperative
To Get A Helios Capture; All 1939 and 1708 multiplexed trucks only
J1939 Data Link Troubleshooting; Only Models with 250k Baud Data Link (Black 9 Pin Diagnostic Connector)
J1939 Data Link Troubleshooting
NEW Ultrasonic DEF Tank Sending Unit; only models with SCR Aftertreatment system.
J1939 Data Link Troubleshooting
SCR Vehicles Setting 3363-16 (FC1713) due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
Cooling System Flush Procedure
J1939 Data Link Source Address Information
Updating OnCommand Link with Accelerator
OnCommand EZ-Tech
Winter Front Usage
Diagnostic Interface Cable Reference Guide
OnCommand EZ-Tech Download Center
EZ-Tech Download Center
Using Vehicle Health Report Faults
How To Get A Helios Capture
OnCommand EZTech
OnCommand EZ-Tech Download Center
SCR Vehicles Setting 3363-16 (FC1713) due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
ESPAR AirTronic Low Run Time.
ISB Starting System Diagnostics
Horn Sounds On Its Own While Vehicle Parked - OR - Horn Inoperative
RADIATOR INTERNAL RESTRICTION AND FLUSH PROCEDURE
TORQUE CHANGE FOR 5/8 INCH REAR AXLE SHAFT FLANGE MOUNTING STUD WITH CONE LOCKS AND FLAT WASHER TYPE HARDWARE.
Engine
47 bulletinsThis article only applies to Models w/ 0016UZL Built Between 06/23/2014 05/11/2020 OR Models w/ 0016UZL w/ Safety...
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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).
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature.
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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.
New CARB Idle Reduction Change Request
Engine replacements for all International engines will need to follow this procedure.
In some geographic areas, ambient temperatures reaching below 15F (-10 C), including high levels of humidity, an...
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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.
Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
How to request a horsepower quote; all International and Cummins engines
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI...
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engines or Cummins ISB engine with Allison transmissions
Calculating pulses per mile (speedometer setting); only models equipped with International engines
Engine Oil Capacities.
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All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines
Certain school buses may not conform to Federal Motor Vehicle Safety Standard (FMVSS) 217 the exit opening...
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configuration may not meet the minimum exit opening criteria.
Cummins engine vibration with aftermarket air conditioning installed
Bus with Cummins B6.7 engine and Dual A/C - Cylinder Head Failures
Fuel Filters, Winter Additives, and Blending Fuels for Cummins Engines
Oil Capacities; All Electronic International Engines 1994 - Present.
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Cummins ISB, ISM & ISX
Voltage gauge drops on cold engine start-up; Only models built with Cummins ISB, B6.7, ISL, or L9 engines
Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure
Aggressive Brakes with Air Brake Foot Valve Leak on Bus; only models with feature code 04WEA - Parking Brake Interlock -...
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With Air Brakes Only
Fuel Fired Engine Coolant Heaters
ISB Starting System Diagnostics; Only models built with cummins ISB engines
Cylinder Performance Analyzer (CPA) Resource Center
Engine Oil Capacities All Electronic International Engines 1994 - Present.
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Cummins ISB, ISM & ISX
Optional Fuel Fired Engine Coolant Heaters fuel fired engine coolant heaters may require the fuel system to be primed...
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prior to use.
On certain DuraStar and CE Bus models with Cummins ISB engines, the upper radiator hose saddle clamps are positioned...
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improperly,and may cause punctures in the upper radiator hose. New saddle clamps, with a revised design and positioning, must be installed to correct the issue, as outlined in the following document.
EPA 2010 MaxxForce 7 Engine Calibration Releases
Certain IMMI Driver seat belt assemblies with L9 end-release seat belt buckles may fail to conform to the requirements...
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of Federal Motor Vehicle Safety Standard No. 209 ?Seat Restraint Systems.?
Certain IMMI Driver and/or passenger seat belt assemblies with L9 end-release seat belt buckles may fail to conform to...
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the requirements of Federal Motor Vehicle Safety Standard No. 209 ?Seat Restraint Systems.?
Certain IMMI Driver seat belt assemblies with L9 end-release seat belt buckles may fail to conform to the requirements...
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of Federal Motor Vehicle Safety Standard No. 209 ?Seat Restraint Systems.?
Urea Quality Sensor (UQS) Supplemental Diagnostic and Service Information; only models with SCR Aftertreatment system...
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and N9, N10, N13, A26 or Cummins ISB, ISL, ISX engines built from January 2016
Cummins ISB Engine Remote Engine Speed Control with Feature 12XAT
ISB Frequent Regeneration; only models equipped with ISB engine
Ordering SCR Aftertreatment Parts for Vehicles Powered by Cummins Engines
Certain MaxxForce DT, 9, 10 engines with feature code 15LKG were built with incorrect fuel filter assembly, thereby...
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missing the integral 12-volt, 250-watt fuel heater
Bus with ISB Frequent Regeneration; only models with Cummins ISB engine
ISB CAC Port Plug; onle vehicles with Cummins ISB engine
Engine Oil Capacities
Engine Oil Capacities
Cummins Engine Remote Engine Speed Control; only with feature code12XAT or 12XBM
2010 MaxxForce 7 engine DPF Cracking
Dash Cluster Lamp Operation, Functions and Regeneration Instructions, With International engines
CPA Injector Misfire Detection; Only models with 2004 thru 2017 International engines.
Cylinder Performance Analyzer (CPA) Resource Center; Only models with 2004 thru 2017 International engines.
Front Blower Motor Runs Breifly At Initial Power Up
Voltage gauge drops on cold engine start-up; only Cummins ISB equipped vehicles
Installing and Servicing the Rear Sump Stainless Steel Oil Pan on N13 Engines
NAVISTAR: IN CERTAIN TRUCKS, AN EMISSIONS RECALL IS REQUIRED TO RECALIBRATE ENGINE ECM SOFTWARE TO REDUCE INCORRECT...
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FAULT CODES AND TO PREVENT OVERLOAD OF DIESEL PARTICULATE FILTER (DPF). *PE
Electrical
20 bulletinsThis document details the procedure that must be followed to ensure proper alternator troubleshooting.
This document covers battery diagnostics, maintenance and storage requirement.
Cummins B6.7 Grid Heater Relay
General Wheel Speed Sensor Troubleshooting
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
General wheel speed sensor troubleshooting
Cummins B6.7 Grid Heater Relay
Applying Advanced Logic Templates; only models equipped with a BCM or ESC
How to Diagnose Electrical Problems with Diamond Logic Builder; only models equipped with a BCM or ESC
How to Get from History and Program a BCM or ESC; only models equipped with a BCM or ESC
ECM Recalibration to prevent possible frequent DPF level 1, 2, or 3 excessive soot levels and dash warning lights...
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between 1,000 and 1,500 miles; only models equipped with a 12X10 Diesel Particulate Filter (DPF). Retired
IC Bus Electric Entrance Door Fuse
HVAC fault 2609-19 with 4th Gen BCM; Only models equipped with 4th generation BCM
Urea Quality Sensor (UQS) Boot Order
Battery Testing, Diagnostics, and Maintenance information
Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
Urea Quality Sensor (UQS) Supplemental Diagnostic and Service Information
Determine Wheel Speed or Driveline Vibration using a Smart Phone and Free VibSensor Application
Air Conditioning Electrical Diagnostics
CUMMINS ISB WITH 15 GALLON DEF TANK WIRING SCHEMATIC
Body & Paint
17 bulletinsThis article addresses chassis lean conditions on all chassis.
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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.
Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
This document will guide the user through determining if there is a sealing issue with the rear emergency door on a CE...
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Bus.
Bus Body Entry Door Switch, LH Panel Mounted
Bus Door Adjustment procedure for Electric and Air; only models built 09/15/11 or later
Bus Door Adjustment procedure for Electric and Air
Body Controller Resource Center
Headlight Condensation or Frost; excludes sealed beam headlights such as on WorkStar, Paystar and 9900i)
Mirror Repair Procedures and Replacement Parts Availability
Body Controller/ESC Software Updates
Bus Door Adjustment procedure for Electric and Air; only Models Built 9/15/11 or later
Bus Entrance Door Adjustment Procedures; only models built prior to 9/15/2011
Bus Passenger Window Troubleshooting; only buses built after 4/17/17
Bus Body Tie Down, Floor Sill Repair
First Check to make when Troubleshooting any Body Controller or ESC Issue
The First Check to make when Troubleshooting any Body Controller or ESC Issue
Headlight Condensation or Frost; excludes sealed beam headlights such as on WorkStar, Paystar and 9900i)
HVAC & Climate
15 bulletinsTitle: A/C Refrigerant and Oil Capacities Applies To: All current models
Factory Installed Air Conditioning, EC4.0 System operating instructions and the service manual
Bus Air Conditioning Service Contacts for HVAC Information
A/C Refrigerant and Oil Capacities
The formed heater hose to the driver?s heater over time may fatigue, resulting in a split hose.
The formed heater hose to the driver?s heater over time may fatigue, resulting in a split hose.
Troubleshooting & Resetting HVAC Doors; only vehicles with Feature Codes 0016WCT and 0016WCS
A/C Refrigerant and Oil Capacities
2010 and Newer Vehicle Air Conditioning Diagnostics (Start Here)
2010 and Newer Vehicle Air Conditioning Diagnostics (Start Here)
Factory Installed Air Conditioning, EC4.0 System
2010 and Newer Vehicle Air Conditioning Diagnostics (Start Here)
2010 and Newer Vehicle Air Conditioning Diagnostics (Start Here)
Espar Airtronic Heater Diagnostic Guide
2010 AND NEWER VEHICLE AIR CONDITIONING DIAGNOSTICS (START HERE)
Brakes
14 bulletinsThis document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and...
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windshields using an ultrasonic sound detector.
This document is to guide users to eliminate brake pedal rattle noise.
WABCO Full Power Brake Diagnostic Code (DTC) Index
How to program parameters after changing WABCO FPB ECU (Parking brake shows N/A)
The lower outside corners of the passenger seat back may not have sufficient padding to conform to all requirements of...
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FMVSS 222 or CMVSS 222; only School bus models equipped with IC Bus passenger seats.
Hydraulic Brake System Park Brake Inspection and Adjustment Procedures; only models with Hydraulic Brake system equipped...
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with 04GBJ Park Brake
IC Bus Service Brake Switch Inspection
Brake Light Operation on HPV with Full Power Brakes; only models equipped with Meritor WABCO Full Power Hydraulic Brakes
Wabco Hydraulic Power Brake cap/grounds diagnostics and repair procedure
Wabco Full Power Hydraulic Brake Diagnostic Code (DTC) Index
WABCO Full Power Brakes Park Brake Troubleshooting; only with SAHR (hydraulic powered) praking brake
Wabco FPB/Quadraulic Brake Uneven Wear
Chassis with Quadraulic Brakes; Quadraulic Brake Pads
IKNOWLEDGE: NAVISTAR CE BUS, BE BUS, AND DURASTAR MODELS DUE TO VEHICLE VOCATION, LOADING, OPERATING ENVIRONMENT, AND...
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DRIVING HABITS, MAY EXPERIENCE BRAKE LINING WEAR RATE THAT WILL VARY. *TA
Infotainment
11 bulletinsThis tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files.
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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.
Radio Diagnostics and Information
NEW Ultrasonic DEF Head Unit; All SCR vehicles
NEW Ultrasonic DEF Head Unit available; Only models equipped with SCR Aftertreatment.
NEW Ultrasonic DEF Head Unit; Only vehicles Equipped with SCR
NEW Ultrasonic DEF Head Unit; only models equipped with SCR Aftertreatment
NEW Ultrasonic DEF Head Unit
Radio Diagnostics and Information
Radio Diagnostics and Information
Asterisk in Lower Right Quadrant of Dash Display
RADIO DIAGNOSTICS AND INFORMATION
Lighting
7 bulletinsRepair Procedures for Vehicles Struck by Lightning
Bus Strobe Light Replacements
Repair Information for Damaged Headlight Connector
Repair Information for Damaged Headlight Connector
Repair Information for Damaged Headlight Connector
Service Interval and Maintenance Lamp information; when equipped with ISX and ISB Cummins
Upper Radiator (Inlet) Hose Saddle Clamp Causing Leaks
Pre-Delivery & Maintenance
5 bulletinsTitle: Service Portal iKNow Feedback Case Types Applies To: All
Bus seat back foam inspection guidelines
Post Trip Inspection System Will Not Disarm or Does Not Operate Correctly; excludes Child Reminder System or Child Check...
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Mate.
Ricon Public Use,"S" 2000 and 5500 Series lift recall
Ricon Public Use,"S" 2000 and 5500 Series lift recall
Transmission
4 bulletinsTitle: Steering Gear Seal Repair Guidelines Applies To: Steering gears
Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
This article is for adding additional protection to the driver's area of the bus to help mitigate the transmission of...
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germs.
Transmission Upshifting too Fast; Only with Allison Gen 4 LCT (1000 and 2000 series) Transmission
Fuel System
4 bulletins2010 Dash Cluster Lamp Operation with new DPF Lamp Locations , Functions and Regeneration Instructions
2010 Dash Cluster Lamp Operation with new DPF Lamp Locations , Functions and Regeneration Instructions
DPF Snap Accel Test - Quick Test to All vehicles with DPFs
ONLY VEHICLES EQUIPPED WITH DAVCO FUEL PRO 382; TECHNICAL MANUAL INSTALLATION DIAGNOSTICS AND SERVICE
Suspension
3 bulletinsTo prevent premature steer axle wheel bearing failure.
Suspension Lean Diagnostics; All models
Improper torque was applied to six left (driver) side, front IROS suspension hanger, and two crossmember bolts
Air Bags & Safety
3 bulletinsDriver?s seat belt tongue button; Only with Seat Belt Part numbers 4091405c1 thru 4091408c1
Change in Seat Belt Manufacturer - Inspection and Replacements
DRIVER AND PASSENGER SEAT BELTS
Tires & Wheels
2 bulletinsThis article describes how to fix a speedometer that does not read accurately.
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An inaccurate speedometer can be caused by changing the tire size, changing rear axle ratio (RAR), or by parameters being inadvertently changed during a programming event. Use the formulas and calculator below to correct the pulses per mile (PPM).
Suggested alignment target values when performing a vehicle axle alignment
Software & Calibration
2 bulletinsUsing Supplier Software to Check DTCs
Dealer EZ-Tech and Diagnostic Software Support Resource Center
Hybrid & EV
1 bulletinISB 6.7 Frequent Regeneration
Steering
1 bulletinSteering Fluids