Actron CP9135 OBD II AutoScanner - Manual (Page 6)

1-1 Quick Start
1.1 Introduction
Congratulations!
You've purchased an automotive scanner that can unlock the fault
code information stored in the on-board computer(s) of your car or
light truck. This information gives you the power to identify and repair
problems that may arise with the operation of your vehicle's engine.
Cars and trucks cannot completely diagnose their problems, and no
scanner available can tell you with pinpoint accuracy what is wrong
with the vehicle.
Once you have retrieved the diagnostic information from the computer,
you have taken the first step in finding and fixing the problem. Now it
is time to continue with the rest of the diagnostic process.
Important points to remember:
• Diagnostic Trouble Codes (DTCs) warn us of a symptom or
problem with a particular engine system, not a specific part.
• The computer can only report DTCs based on what its sensors
are telling it.
• Sometimes, sensors appear to be bad when in fact, they are not.
- A poor connection, broken wire or short circuit may be preventing
the sensor signal from reaching the computer.
- A malfunction in one system may cause a sensor in another
system to report a value that is too high or too low.
• We recommend the use of a vehicle specific service manual to
assist you with the diagnostic process.
• Some of the vehicle computer's sensors and actuators can be
pretty expensive; it is best to make sure they are defective prior
to replacing them!
Section 1
Quick
Start