Using a Generic OBD2 scan tool and list of functions.THINKOBD series

To find what you are after:
:50 Remove plug cap
1:02 tool should turn on if the fuse is ok
1:18 protocol search CAN or older types PWM or VPW
1:35 list overview
2:02 CEL is on Toyota also turns on other lamps example.
2:10 State inspection monitors list
2:20 Data PIDS (lines of Data)
2:30 Read codes
3:00 Individual IM (inspection maintenance monitors) state inspection requirements vary by state
3:55 Data stream overview
4:20 Long and short-term fuel trim data
4:36 RPM data useful for cranks no start testing
5:13 Onboard monitors (Mode 6 Data) some will have misfire history (not all) and pass-fail of other systems.
6:40 Code search using scan tool (Google is faster) and codes can vary by manufacturer (same number but means different circuit be very careful here!)
7:56 Freeze frame (what set the code and what was the engine doing JUST PRIOR to setting the code this delay can be seconds long which will make a difference so it does not always catch the root cause but is helpful.
8:51 example of high long-term fuel trim (19% it must be above 20% to set a code) this truck has catch cans that are causing higher at idle long-term fuel trim.
9:33 Fuel rail pressure (if equipped) and supported useful for cranks but does not start testing.
10:15 Fly by wire data (electronic throttle and gas pedal (note values will never show 0% at idle in generic).
10:59 VIN and calibration data (look for software to be modified here if a tuner was used)
11:19 Non EGR vehicle but has EGR monitor on a 3.5 EcoBoost Ford which is not equipped with EGR but with dual VVT and can still make exhaust gas recirculate so has the monitor.