OEM technology
OEM Electronic Diagnostics for Class 5–8 Fleets
Reading a code off a generic scanner tells you a circuit is unhappy. OEM-level diagnostics tell you which part is failing and why — and that difference is usually the whole repair bill.
The work
What an OEM diagnostic session covers
Most of the expensive mistakes in heavy-duty repair start at the diagnostic step. A generic reader hands you a fault code, the code names a circuit, somebody replaces the component in that circuit, and the light comes back a week later because the actual fault was upstream — a chafed harness, a failing sensor reference voltage, an air leak fooling the ECM into reporting something that is not wrong.
We run the manufacturer’s own diagnostic software. That means live and recorded parameter data, the OEM guided test procedures, bi-directional actuator control to make a component prove itself, and calibration or reflash work where the platform supports it. It is the same tooling a dealer service bay uses, brought to your yard instead of your unit going into their queue.
- Full engine and aftertreatment fault-code scan, active and stored
- Freeze-frame and live parameter data around the fault
- OEM guided test procedures rather than parts-swapping
- Bi-directional actuator and cylinder cut-out testing
- Harness, connector and reference-voltage checks
- ECM calibration and reflash where the platform supports it
- A written summary of what was found and what it needs
When to call
Worth a diagnostic session when
- The same fault has come back after a previous repair
- A unit is in derate with no obvious mechanical cause
- Regens are happening far more often than they should
- A truck fails an inspection on something nobody can pin down
- You are buying used and want to know what you are buying
Coverage
Engines and makes
Cummins and Detroit Diesel, including Cummins LNG and CNG alternative-fuel systems, across Freightliner, International, Isuzu, Hino, Autocar.
Every session ends with a written finding — what the fault is, what it will take, and what it will not take. If the honest answer is that the unit needs a dealer or a shop, that is what the report says.
Where we work
Electronic Diagnostics across Greater Los Angeles
We bring this work to your yard across the districts we cover from our Glassell Park base:
Related
Other services
Diesel Engine Repair
Cummins and Detroit Diesel engine work carried out at your yard — diagnosed with OEM software before a single part comes off, by technicians who spent seventeen years doing it inside Freightliner and International dealerships.
Read moreDPF & Aftertreatment
A truck that regens constantly is not telling you the filter is full. It is telling you something upstream is putting soot into it faster than it should.
Read moreCNG & LNG Service
Very few shops in Los Angeles will touch a natural-gas heavy-duty engine. If you run CNG or LNG and have been told to take it to a dealer, talk to us first.
Read moreClean Truck Check
A Clean Truck Check failure does not just cost a retest. Compliance is tied to DMV registration — an unresolved failure can stop you registering the unit at all.
Read moreBrake, Air & Suspension
An out-of-service brake defect takes a unit off the board until it is corrected. We carry the components and the tooling to correct it in your yard rather than in a shop queue.
Read moreDrivetrain & Transmission
Wheel-end and axle work is the job most people assume has to go into a shop. With the heavy jacks and tooling on board, most of it does not.
Read moreNeed electronic diagnostics at your yard?
Call dispatch with the yard address, unit number, make and engine, and any fault codes on the dash.
Straight answers