NHTSA ID Number: 11010239
Manufacturer Communication Number: TSB240061
TSB/Document Date: 2024-11-07
Summary
This Technical Service Bulletin describes the verification and resolution steps for the coolant heater control module which may contain a faulty combination of software and firmware, resulting in low cabin heat. This is an update to a previously submitted communication.
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TSB/Document ID: TSB240061
Replacement Service Bulletin Number:
MFR Communication Date: 2024-10-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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11/6/24, 11:06 AM
Coolant Heater Control Module Preventing Heating: Low Cabin Heat
Technical Service Bulletin
Technical Service Bulletin: TSB240061
Released Date: 09-Oct-2024
Coolant Heater Control Module Preventing Heating: Low Cabin Heat
Coolant Heater Control Module Preventing Heating:
Low Cabin Heat
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
BES CM2450 EV107B
BES CM2450 EV110B
BES CM2450 EV111B
Issue Summary
Symptom:
Low cabin heat
Root Cause:
Coolant heater control module has a faulty combination of software and firmware
Verification
Visually check one of the three coolant heaters has the Cummins
® part number 5678778
label below.
If coolant heater part number is not part number 5678778, this TSB does not apply.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2024/tsb240061.html?q=tsb240061
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11/6/24, 11:06 AM
Coolant Heater Control Module Preventing Heating: Low Cabin Heat
Figure 1, Coolant Heater Part Number Label.
Visually check the “ASW” and “SW” versions on the label of the coolant heater control module.
Figure 2, Coolant Heater Control Module Label.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2024/tsb240061.html?q=tsb240061
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11/6/24, 11:06 AM
Coolant Heater Control Module Preventing Heating: Low Cabin Heat
1. ASW: correct version 3.0.0SW: correct version 1.3
2. SW: correct version 1.3
Faulty combinations of “ASW” and “SW”:
ASW 3.0.0 and SW 1.1
ASW 3.0.0 and SW 1.2
ASW 3.1.0 and SW 1.3
Correct combination of “ASW” and “SW”:
ASW 3.0.0 and SW 1.3
Resolution
If the faulty combination of “ASW” and “SW” is present, replace coolant heater control module.
If the correct combination of “ASW” and “SW” is present, continue through published
Troubleshooting Tree.
Service Parts
Service parts are offered. See Table 1 for part numbers.
Table 1, Service Parts
Part Description
Existing Part
Number
Obsolete
Superseded
New Part
Number
Coolant Heater
Control Module
5678860
No
No
-
Document History
Date
Details
2024-3-19
Module Created
2024-10-9
Added EV111B to Product Affected list.
Last Modified: 09-Oct-2024
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2024/tsb240061.html?q=tsb240061
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