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Hours
- Mon 9:00AM - 5:00PM
- Tue 9:00AM - 5:00PM
- Wed 9:00AM - 5:00PM
- Thu 9:00AM - 5:00PM
- Fri 9:00AM - 5:00PM
- Sat Closed
- Sun Closed
- MORE >
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Semper Fi Fleet Maintenance LLC
444 West Lake Street
Suite 1700
Chicago, IL 60606
Fleet Computer Diagnostics Services
Fleet Computer Diagnostics in Chicago, IL
Modern fleet vehicles rely on onboard computers and electronic systems to monitor everything from engine performance and emissions to transmission operation and electrical components. When a warning light appears or a vehicle begins behaving differently, computer diagnostics can provide valuable information about where the problem may be coming from. Using professional diagnostic equipment alongside hands-on testing, technicians can pinpoint the underlying issue and recommend the appropriate repairs, helping reduce guesswork and unnecessary downtime.
Services We Perform
We carry OEM software for proper diagnostics. These are a few...
- Cummins Insite
- Service Maxx Pro
- Isuzu
- GMC
- Hino
- Detroit Diesel
- VCADS Pro
- Caterpillar SIS
- Allison DOC
- Nexiq
- Haldex Trailer ABS
- Meritor Wabco
- Bendix Diagnostics
What Can Fleet Computer Diagnostics Identify?
Computer diagnostics can provide valuable insight into problems affecting many of your fleet vehicle's major systems. By communicating with the vehicle's onboard computers, technicians can retrieve diagnostic trouble codes and vehicle data that help narrow down the source of performance, electrical, or drivability concerns.
Computer diagnostics can help technicians investigate problems involving:
- Engine performance and misfires
- Fuel and ignition systems
- Transmission operation
- Emissions systems
- Sensors and electronic controls
- Charging and electrical systems
- ABS and traction control
- Other vehicle-specific electronic modules
It's important to remember that a diagnostic trouble code does not necessarily identify the part that needs to be replaced. Instead, it provides technicians with a starting point for additional testing and inspection so they can determine the underlying cause of the problem.
Dashboard Warning Lights You Shouldn't Ignore
Dashboard warning lights are often one of the first signs that a fleet vehicle has detected a problem. While some warnings may indicate routine maintenance needs, others can point to issues that should be diagnosed promptly to prevent additional damage or an unexpected breakdown.
Warning lights fleet drivers should pay particular attention to include:
- Check Engine light
- ABS warning light
- Battery or charging system warning
- Transmission warning light
- Traction or stability control warnings
A steady Check Engine light typically indicates a problem that should be diagnosed soon, while a flashing Check Engine light can signal a more serious issue, such as an active engine misfire. Drivers should avoid ignoring warning lights and have the vehicle evaluated when necessary to help prevent a smaller problem from becoming a more costly repair.