Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome! My name is ***** ***** I can assist you with your question. Can I start by getting your VIN?
Thank you for the VIN! Does the check engine light come on with the key on? Does the throttle position sensor have 5 volts going to it with the key on?
Hello and sorry for the delay! I had to step out and my phone was not working to reply back. Anyway, do you know if the ASD relay is activing when cranking the engine over?
Still waiting for your reply.
Hello and sorry for the delay! Did you check the powers and grounds going into the PCM before replacing it? If so, what pins did you check and what were the results?
If there is no voltage at the TPS with the key on, then the computer is not awake. Does the check engine light come on with the key on for a bulb check?
Please send over the VIN number again as it says invalid VIN
Hello and sorry for the delay! Next, check the 5 volt power supplies for shorts to ground. The Manifold Absolute Pressure sensor, Throttle Position Sensor, Crankshaft Position sensor, Camshaft Position sensor and the A/C pressure transducer are all powered by the two 5 volt supplies coming from pin 17 on the C1 connector and pin 31 of the C2 connector.
You could cut this wire a few inches from the PCM to see if the reference voltage comes back. This way you will know if there is a shorted sensor or wiring issue shorting out the PCM.
YES, I do believe so
YES, it does. As long as the PCM is not getting shorted out when this happens and the powers and grounds check out good when this happens, then yes, the PCM is bad and will need to be replaced.
I am glad I can help! Please dont forget to honor your good faith deposit by rating my answer as "excellent service" for assisting you with your question.
Hello! YES, if the PCM is good and all the inputs are good, the PCM should operate. If not, it is bad and needs to be replaced.
Hello! It's Amedee from just answer. I am just checking in to see how things are going and to see if you need any further assistance? Let me know!
Hello! Your saying that the PCM was replaced and now the engine starts and runs? The No bus message is there?
So at least we got it running right? Excellent! I am glad I was able to help get it running!
The next step is to find out which cylinder is misfiring and then check for spark, fuel and compression on that cylinder.
HOW DID YOU CHECK FOR THESE AND WHAT WERE THE RESULTS/READINGS?
So the engine cranks and does not start? What is the fuel pressure readings? What is the engine compression readings?
IT sure sounds to me like it is an electrical issue. However, I need to understand the big picture in order to point you in the right direction.
Hello! It's Amedee from just answer. I am just checking in to see if you need any further assistance?