What to do if your OBD2 scanner is not working?
Do not worry about the connector not having that many pins in it most have pins missing which is normal. Try using the scan tool on other car first to see if it is working before checking the Mercedes. If it works check to see if the check engine lights works. Please let us know what you find so it will help others. helpful?
Why is my OBD2 not communicating with my ECU?
If you ARE getting power, then options are: Break in the harness between the OBD2 connector and the ECU. One of the pins in the connector is pushed back into the housing, or bent out of shape, so far that your tool’s OBD2 cable can’t make contact. This is easy to do with a probe if you’re not careful.
Where are the fuses for the OBD2 scanner?
If not please check the system fuses 17, and 15. Also check the ALDL for corrosion and clean up the terminals as needed. Here is a wiring diagram which pertains to most cars showing the power going to the ALDL connector. (below) If anyone reading this needs the wiring and the fuse ID to there car please send there request here.
Why is the OBD2 port pinout not communicating?
Thanx in advance. Here is is the OBD2 port pinout, a bad ground will prevent communication, pin 5 is a ground. See if it has a good ground. Key off and use a good 10 megaohm impedance ohmmeter to test the pin 5 to ground. If no ground the circuit is broken somewhere between the OBD2 connector and the PCM
Do not worry about the connector not having that many pins in it most have pins missing which is normal. Try using the scan tool on other car first to see if it is working before checking the Mercedes. If it works check to see if the check engine lights works. Please let us know what you find so it will help others. helpful?
Thanx in advance. Here is is the OBD2 port pinout, a bad ground will prevent communication, pin 5 is a ground. See if it has a good ground. Key off and use a good 10 megaohm impedance ohmmeter to test the pin 5 to ground. If no ground the circuit is broken somewhere between the OBD2 connector and the PCM
Can you read your OBD-II code on a car?
If you’re resourceful enough to use your car’s OBD system, then you’re way ahead of the game, but let’s start with a refresher on the OBD-II code ‘s diagnostics, error messages, scan ports, and more. What Is OBD? Since the mid-1990s vehicles have had a built-in troubleshooting system known as OBD.
Is the communication line on the OBD II working?
Communication line does not provide the power. The power is pulled from the pos and neg ports on the obd ii. There is something wrong with your communication wire Click to expand… This is what I feared….. I checked all the fuses and couldn’t find a single blown one.