2023 Ic Bus Evsb TSBs
71 Technical Service Bulletins across 13 categories
Categories
Electrical
23 bulletinsThis document will guide the user through diagnosing a failed high-voltage battery when there is a suspected concern...
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indicated by symptom or fault code.
Certain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
Certain IC BusTM Electric CE Series buses may have incorrect suction and discharge pressure sensors.
Certain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
This document will walk the user through correcting the battery State of Charge (SOC) calibration.
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It has been found on some electric vehicles that the SOC calibration can become incorrect over time. Often times this is from the vehicle sitting a long period without use or charging the batteries. This will result in the SOC value on the cluster becoming inaccurate compared to the SOC value in the battery packs. This may also result in a low value for the vehicle range estimate on the EGC.
This document will guide the user through determining why the vehicle is not able to enable the high voltage system or...
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enter Drive Ready mode.
This document will guide the user through the TPIM HV ( High Voltage ) DC Cable installation with proper shielding...
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position.
Title: eCE EV Bus Sealed Relay Kit
Certain IC Bus Electric CE Series buses may have the front and rear A/C evaporator temperature sensor harness routed...
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incorrectly.
DEFECT DESCRIPTION: Certain IC Bus Electric CE Series buses may have an A/C Relay Board that was incorrectly assembled.
This document will guide user how to properly inspect for the location of A/C evaporator temperature sensors and replace...
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the sensor/harness connection if necessary.
This document will guide the user through the TIPM HV (High Voltage) DC cable installation with proper shielding...
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position.
Updates to Air Conditioning (A/C) Control Module Software and ECU software links in Tool Information table.
Certain electric vehicles may have been built without the Level 2 Manual Service Disconnects (MSDs).
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This document walks the user through installing the Level 2 MSDs and high-voltage circuits needed.
This document AC circuit overcurrent causing Level 2 AC charger failires
Certain IC Bus Electric CE may experience liquid refrigerant migrating into the compressor, which could reduce the...
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electrical insulation below the calibrated threshold.
Printed Circuit Board (PCB) for the 2-1 Inverter causing a false overvoltage condition when heat is applied.
EV CE Bus Electric Heater Fuse Inspection and Heater Control Adjustment
EV High Voltage HVAC Diagnostic Looper Plugs
General Wheel Speed Sensor Troubleshooting
SDS EV Battery Health Session
Certain International eMV Series trucks and IC Bus Electric CE Series school buses may have been built without charge...
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port warning label, high-voltage warning label, and 12 volt disconnect warning label.
N2 telematics module not communicating with OCC systems.
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Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
Other
14 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
Certain IC Bus Electric CE Series school buses may have loose or missing bracket.
Vehicle experiencing coolant pump fault code (spn 523580 fmi 31) with no vehicle symptoms or concerns.
Guide users through proper operation of the air dryer for electric eCE & eMV
Cabin Heat Coolant Over Boil with fault SPN 5574 FMI 7
J1939 Data Link Source Address Information
Diagnosis of chassis wander complaints.
Luggage rack upholstery repair; only busses equipped with luggage rack.
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
Power Electronics and Cabin Heat Cooling system Fitting Leaks
Engine
7 bulletinsThis 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 40F (4C), including high levels of humidity, an operator...
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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 currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
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
Certain IC Bus Electric CE Series buses may have drive motors that do not operate to their full potential.
Software & Calibration
6 bulletinsIC Bus Electric CE Series and International eMV Series VCU calibration release information
IC Bus Electric CE Series and International eMV Series VCU calibration release information
IC Bus Electric CE Series and International eMV Series VCU calibration release information
IC Bus Electric CE Series and International eMV Series VCU calibration release information:
Certain IC Bus Electric CE Series school buses may need to have the VCU calibrated to the latest calibration.
IC Bus Electric CE Series and International eMV Series VCU calibration release information
HVAC & Climate
5 bulletinsThis document will guide the user through information required to know before servicing air conditioning systems on an...
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electric vehicle
Title: Air Conditioning Software Versions Applies To: IC Bus Electric CE Series
Title: A/C Refrigerant and Oil Capacities Applies To: All current models
Servicing Air Conditioning Systems on Electric Vehicles
Air Conditioning Shuts Off During Full Throttle
Hybrid & EV
5 bulletinsTitle: Electric Vehicle State of Charge Calibration Applies To: All Electric Vehicles
Improve charging capability with new calibration for eCE School Bus and eMV trucks
CE EV and eMV Calibration Release information
SDS EV OCI charging session instructions
SDS EV Signal Monitor CAN logging session instructions
Body & Paint
4 bulletinsTitle: Next Gen Bus Air Entrance Door Exterior Switch
This 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.
These certain buses may have roof water leaks resulting from incorrect assembly described in Roof Joint Recalls 23501...
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and 23502.
Bus roof leaks
Pre-Delivery & Maintenance
2 bulletinsTitle: Service Portal iKNow Feedback Case Types Applies To: All
Bus seat back foam inspection guidelines
Infotainment
1 bulletinThis 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.
Brakes
1 bulletinThis 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.
Suspension
1 bulletinTitle : Correct Driveline Angles and Their Relationship with the Truck Suspension Applies To : all truck & bus...
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(including BEV / EV)
Transmission
1 bulletinTitle: Steering Gear Seal Repair Guidelines Applies To: Steering gears
Lighting
1 bulletinCertain IC Bus Electric CE Series school buses may have an outdated decal explaining LED light meanings after V10000...
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calibration has been completed.