Compressor Oil for R1234yf
Working on R-1234yf systems is not that different from the R-134a variety.
Starters & Alternators – Tips For Diagnostics
Here are 4 tips to follow when replacing starters and alternators.
Talking To Customers About Oxygen Sensors
One of the toughest components to sell as a maintenance item, or even a replacement item, is an oxygen sensor.
Exhaust Gas Recirculation Operation and Diagnostics
Since exhaust gas does not burn, this lowers the combustion temperatures and reduces NOx emissions from the engine.
ECM Damage
Engineers have devised two strategies that can be called the “immune system” for the electrical system.
Voltage Drop Testing
The measurement of voltage is like the speed of the traffic.
CAN Bus Communications
There are three types of bus configurations that you will come in contact with — loop, star and a hybrid of both.
PCV System DTC
PCV systems are far more complex now, but they are also much better at controlling crankcase pressure.
GM Diagnostic Tip on Misfires, Noises and DTCs
Determine which description best matches the vehicle you are working on, and perform the suggestions as necessary.
Fuel Pumps and Cranking
Diagnosing the problem comes down to understanding what causes a loss of fuel pressure.
Auxiliary Coolant Pumps
Don’t be fooled into thinking that these pumps will go away with the surge in hybrid and electric vehicle production.
AC Condensers
The characteristics that make the parallel-flow condenser so efficient are among its major drawbacks as well.
