GPS Tracking vs CAN Bus Telematics

When evaluating fleet telematics for heavy machinery, the most important question you can ask is: "Does this system read CAN bus data, or just GPS?" The answer determines whether you're getting a basic location tracker or a full diagnostic platform.

The Comparison

When GPS-Only Tracking is Enough

GPS-only tracking is appropriate for light vehicles, trailers, and assets where location and trip history are the primary requirements. If you're tracking a fleet of utes, vans, or trailers — and you don't need engine diagnostics — GPS-only is a cost-effective solution.

Pacific Fleet Systems offers GPS-only tracking for light vehicles at AUD $22/asset/month — the Light Fleet plan. This is appropriate for passenger vehicles, light commercial vehicles, and trailers.

When You Need CAN Bus Telematics

For heavy machinery — excavators, dozers, graders, haul trucks, forklifts — CAN bus telematics is essential. Here's why:

Engine hours matter more than kilometres. Heavy machinery is serviced based on engine hours, not distance. GPS-only trackers estimate engine hours from ignition-on time — which is inaccurate because it includes idle time. CAN bus reads actual engine hours directly from the ECU. For billing, maintenance scheduling, and asset valuation, this accuracy is critical.

Fault codes prevent breakdowns. When a fault code is logged on a machine's ECU, CAN bus telematics can alert you immediately — before the operator notices the warning light. Early detection prevents unplanned breakdowns that cost $50,000–$200,000 in lost production on a mining site.

Idle time is invisible to GPS. GPS-only trackers can't distinguish between a machine that's working and a machine that's idling. CAN bus measures idle time accurately — giving you the data to reduce it and save $80,000–$120,000 per year on a 20-machine fleet.

The Bottom Line

For light vehicles and trailers, GPS-only tracking is sufficient. For heavy machinery — any asset where engine hours, fuel consumption, fault codes, and maintenance matter — CAN bus telematics delivers 5–10x more value than GPS alone.

When evaluating telematics providers, always ask: "Does your hardware connect to CAN bus, or just GPS?" If the answer is just GPS, you're paying for a location tracker and calling it fleet management.