NHTSA ID Number: 11034479
Manufacturer Communication Number: SER26-023
TSB/Document Date: 2026-07-03
Summary
This communication and associated release notes detail the specific areas of the software that were impacted with the current release.
Release Notes for APX™ SW8 Software
Released Version
6/4/2026
09.88.00
List of Features
1 MSM memory corruption mitigation enhancements
Implement proactive notification alarm
A26166 Check Cooling
2 System
3 Alarms A00021 and A00128 not reported in standby mode
Released Version
8/25/2025
List of Features
1 Data recorder reported value correction
62-90538-00 REV J
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09.87.00
List of Features
Correction for display reporting OLD SW when attempting to load
1 SW098600
Auto-recover control system after performing software update if
2
unsuccessful
Vector pretrip LIV alarm (P170) current limit change (1.0 to 0.2 A)
3 when solar panel is configured
Adjustment to preheat logic (17.0 to 17.1A) to prevent false
4 A00040 alarms.
5 Fuel heat relay logic changes to improve cold start performance
Released Version
3/7/2025
Models Affected
X4™
Vector™
7300 7500 7700
8500 8600MT 8611MT 8700 8800MT 8811MT
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Models Affected
X4™
Vector™
7300 7500 7700
8500 8600MT 8611MT 8700 8800MT 8811MT
X
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09.86.00
Models Affected
X4™
Vector™
7300 7500 7700
8500 8600MT 8611MT 8700 8800MT 8811MT
X
X
X
X
X
X
X
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X
6/12/2026
1 of 5
Release Notes for APX™ SW8 Software
Released Version
2/21/2024
09.85.00
List of Features
1 Update model number list
2 Select model screen blank
3 Current software version info in USB software install menu
4 Advance user mode access after remote software update
5 Added WIF sensor functionality
6 IntelliSleep selection
7 Intelliset file selection enhancements
8 PM maintenance alarms displayed in message center
9 Standby energy consumption (kWH) reporting for telematics
10 Remote software update enhancements
11 Engine fuel consumption data visiblity via telematics
12 Electric fuel pump prime function from display
13 Engine shutdown alarm system response
14 Electric fuel pump functionality
15 C2/C3 evaporator model display selection
16 Remote data download file display improvement
17 A00238 Configuration error after loading intelliset
18 A00073 alarm during pretrip when No AC power is set to ferry
19 EES regen message on display for units without EES
20 Fuse alarm number and description change
21 A00238 Loss of configuration alarm handling
22 CSMV (low suction) control for rail application
23 Vector second stage heat deactivation optimization
24 CSMV start-stop null control with auxillary battery monitor
25 Component test mode menu key functionality
26 C3 Heater contactor and motor overheat alarm handling
27 Electric fuel pump current draw limit change for pretrip
28 AC Voltage value on display correction
62-90538-00 REV J
Models Affected
X4™
Vector™
7300 7500 7700
8500 8600MT 8611MT 8700 8800MT 8811MT
X
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6/12/2026
2 of 5
Release Notes for APX™ SW8 Software
29 Unknown USB message displayed when Carrier USB is inserted
30 USB data download/software upload improvements
31 Fuel saver default setting change to ECO
32 3rd party door switch configuration
33 CURB RAT/RRAT configuration options
34 IntelliSet support for "Region" configuration parameter
35 Power down event reduction when exiting config mode
Released Version
X
X
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Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
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TSB/Document ID: SER26-023
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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