A CAN scanner (controller area network) is by far the most advanced step in
the computerized world of automotive diagnostics. Because car's have several
onboard computers which "talk" to each other and share data such as the PCM (powertrain control module), SRS (safety
restraint system), ABS (anti-lock brake system) Traction control, HVAC, Proximity warning,
Self driving controls to name a few, malfunctions can now be easily detected across
the entire system network using the CAN. Though there are many levels of CAN
scanner tools available you can get an inexpensive unit from
Amazon for about $35.00.
Much like an simple drivetrain (engine) scan the CAN scanner plugs into
the same OBD2 port which is located under the dash on the drivers side in
most cases.
The screen will prompt you choose the manufacturer of the vehicle, then the VIN identification feature
will "pop up" which follows
this step.
The VIN number id will tell the scanner exactly which car you have
including the engine and transmission type, trim level and other options your car may have.
Once you have selected to start the scan it will begin showing each
system status once the scan of a particular system is complete, the
status of said system will appear while detecting communication errors.
If a problem is detected it will allow you to select the system which
will then display the error code. Once the repair is complete you can simple
choose the clear codes prompt and you are done, it's that easy.
Each scanner model will have its own set of options and tasks it
performs so its a good idea to examine a scanner capabilities before
purchasing.
Potential Scanner Capabilities
Read/clear codes for all available systems
Create new keys
ABS valve control for bleeding brake systems
Crankshaft Relearn
Reset battery monitor
PCM and BCM flashing
Reset Steering Angle Sensor (SAS)
Support forced DPF regeneration and adjusting injectors
Reset service mileage and service intervals
Support TPMS sensor relearn
Display live data in text, graph & analog for easy data review
Relearn parking brake pad monitor after replacement