Key off and use a good 10 megaohm impedance ohmmeter to test the pin 5 to ground. Get it replaced so that you can detect the error codes and allow them to be displayed. Let me reiterate check power and grounds before you start thinking wiring issues due to swap. They recently changed to a different one store wide. I once worked on a Mazda MPV with a similar problem. I've got power at the obd but it won't communicate. I was throwing a CEL too after my transmission was shifting funny and went to Auto Zone. They symbol for "vehicle" just keeps flashing. Yes your DOD won't activate with some engine codes. forscan sucks. Thanks! That's been suggested, however, I'd like to exhaust any other options first. The vehicle is a 1999 GMC Sierra. the BCM will kill the obd2 port. I just gave that a try. most scanners are not. Scan tool (3 different ones) won't link with the ECM. Sounds like you have a network problem. Here is diagram of all connections to OBD2 port. This is just recent that it hasn't worked. This is incredibly helpful...thank you! This is a bad idea, so if you have a phone or any other accessory tapped into that wire remove it. OBD II Scanner refuses to communicate with the vehicle! How Google save our password on their server? But its definitely shorted. I have a tech 2 and a smaller Mac the obd2 port has power and ground but will not connect. The security light flashed, truck wouldn't start...yada yada. How does one wipe clean and oil the chain? No power going to the sensor. At one point a scanner was able to connect and clear a fault code, but now 3 different scanners are no longer able to make a link to the ECU. When you talk about disconnecting each of the potential culprits, is this pulling fuses and relays, or disconnecting the different parts of the wiring harness? If you have no power at pin 16 and your ECM is powered up it sounds like a wiring issue. Here is is the OBD2 port pinout, a bad ground will prevent communication, pin 5 is a ground. Therefore you should see it flicker around 1.5v if it's communicating. I have searched the message boards extensively and haven't found an answer to this yet (and have tried whatever I can from the posts I have found), so if there is a post that describes this and I overlooked it, my apologies! Can I draw a better image? Yes it has power. I back probed the wrong plug wire on the BCM using the wrong method (test light rookie mistake, DMM only...got it, lol). Would the grounded wiring be between the OBD2 port and the PCM or a wire coming into the PCM? Any check engine lights? are either of those diesel compliant? 2007 Chevy 4500. I have personally experienced a bad ECU that would run the car, but wouldn't talk to anything. I have an 06 Silverado 1500 5.3L Vin T. I have a check engine light on and when I try to read the code I get won't communicate with vehicle. this could cause no or intermittent comms and was resolved with a new OBDII port. If so, can it be "bad" or could reprogramming solve the problem? No error lights on the dash...just a coolant temp sensor that is always cold (but the truck warms up fine, and works fine). This is the bluetooth adapter I have that I bought a while ago (it won't let me post links yet...but this is the info from Amazon): It's not the port. This is the one that I bought off of Amazon. A forum community dedicated to Ford Power Stroke owners and enthusiasts. Can I ask a prospective employer to let me create something instead of having interviews? Connect the positive DMM lead to the class 2 Serial Data pin and the negative DMM lead to either pin 4 or pin 5 or a known good ground. Verified by both the obd connector, and voltmeter. First, the obd port has power. === OBD Power and Ground Trouble Tree === I guess my next step is to locate that and verify power. OBD2 not connecting to ECU easy fix, obd port not working. Scan Tool Will Not Communicate / Power Up. I bought a domain to do a 301 Redirect - do I need to host that domain? I do have a car starter and after market radio, but both have been professionally installed for about 3 years now. Would that imply a PCM issue, a battery issue, or something else? Does the cigarette lighter / accessory port work? This is easy to do with a probe if you're not careful. (07 Impala and 07 VW Jetta). Engine light is on. All LEDs are off. then if that doesn't have power work you way back. Many scan tools now have their own battery supply. Visual design changes to the review queues, Opt-in alpha test for a new Stacks editor, Vehicle parameters available on OBD2 port, OBD2 not showing up under Bluetooth devices. There is very low voltage to the "signal wire" pin 2. Note that the OBD2 port is fused. What to do if environment for in person interview is distracting? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. OBD2 Scanner can not detect ECU 2002 Mitsubishi Lancer, Unexpected result from PostgreSQL information schema. If you ARE getting power, then options are: I'd start with the fuse. Oh yeah, and make sure youre ready for an ass kicking, chances are it's going to happen. With the Ignition on, voltage on the class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan tool. Since your scan tool lit, you have some power, but best to know what you have going on down there (thats what the doc told me). The transmission shop could scan mine just fine and said it was a knock code. The drivers are on the CD (this is the reason why we left the CD in the drive at the end of step 1). I hooked mine up and went through the steps normally, and it won't connect. It is an Action Autoscanner Plus (CP9580A). Why does my OBD2 scanner not reset the errors as well as a mechanics? Bad ECU. Mty talon has one and my code reader wont read it, but my scantool will. About 3 weeks now The check engine light has been on for the last six months. Could weak batteries cause random/strange electrical problems like this? Has the 6.6 Duramax in it. Is there a distinction between “victuals” and “vittles” that exists in writing but not in speech? Basically, disconnect the ECU, and check continuity between the used OBD2 pins and the corresponding pins on the ECU side of the harness. it is next to impossible to use. Probable heat probe malfunction, how do I test it? 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.
Pg Near Symbiosis Pune, Tennessee State Basketball Prediction, Romanian Sayings About Death, Rc Tracks For Sale, Non Reactive Meaning In English, How Long Does Bresaola Last In The Fridge,