Skip the auto shop - Our mechanics make house calls

Q: Issue with the scanner connection to the EC

asked by on

2000 Blazer. I tried to use my scanner and it was connected with no problems but it wouldn't communicate with the EC. What could be the problem?

A: If you've got a scanner and it's no...

If you've got a scanner and it's not communicating with the computer system, there are really only three possible issues if your scanner has actually worked.

The first possible issue is with wiring pins, specifically in the connector where you plug it in. If the data link connectors are bent they will be unable to operate. Check to make sure that none of them are bent.

Another probably issue is that you've got a wiring problem in the car somewhere and it's shorting the system out. It could be a bad MAF sensor or the itself wiring that is connected to the MAF sensor.

Lastly, the third possibility is a bad EC. If the main computer goes bad, you can't communicate with it. If this is the case, you'll want to hope that you can find the wiring short so that it will be able to communicate.

If you need assistance with these checks, contact a certified mechanic who can find the root of your electrical problems and fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Engine in auto theft mode/ remote is lost, so valet key won't turn on engine.

Hey there, unfortunately there is no way to reset the alarm without having a new key and having it cut and programmed to work on your car by a dealer scanner to program it for you. I recommend having 2...

Q: it will crank but won't start, have replaced and checked so much

The engine will need to be tested to see if you have lost fuel pump operation. Since you replaced the fuel pump, you may have to check to see if the circuit opening relay to the fuel pump and...

Q: My car has a mass air flow circuit range issue

Hello. P0101 is the trouble code for an issue with the MAF sensor circuit range. This code is set when the computer detects an issue with the vehicle's MAF sensor signal. If the MAF sensor has been replaced, then it...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.