Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
hi there, I am Cam. With your issue, you get no spark from the coil?
Ok, do you have access to the scan tool live data?
Ok, that’s going to be the key. We need to see if there is a crank signal being read by the PCM. You replaced the sensor, is there power to the sensor, ground? Wring damages? If you unplug the cam sensor, does it spark?
P1351 is the one of concern. That is the timing wire between the ignition module and the PCM. It’s the white wire. Trace that wire down. If you find no issue, then the PCM is bad as you have replaced the ignition module already.
Ok, let me get the code chart for this so you can follow it.
Here it is.Yes, it could if its not sending power properly. Follow through the document and it should get you there.
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Ok, so we may have a problem with the PCM, did you make it through the diagnosis in the document I posted?
I am going to see if any other experts have an idea of whats going on.
I guess they don't. So i have a question, you went through the code chart for ignition diagnosis that I posted. The steps to the end list what to do if its running, but you did not get it running. How could you complete those steps if it was not running?
Did you have it on AC volts or DC volts?
Then your issue remains your VCM. There is no way around that. If the voltage is not being sent then its bad provided everything else shows up properly.
New or reman? What source?
I would talk to them. Let them know your results and proceed from there.If it waddles like a duck and quacks like a duck......
That code is specific then, VCM, Ignition module or wire. Is there a pin fit issue on the wire at either end? Anything spliced into that wire where it should not be?
The voltage signal of 1-4 volts ac is vital for operation of the cool.
OK so with that we need to go back to the VCM. You replaced it so lets test the voltage at the VCM with the engine cranking. If you get voltage then your wiring is bad.
Terse is an orange in the grey connector, pink in the blue connector and a pink and brown in the black connector. Orange is battery and the other is ignition. Make sure those have power. Then black white wires in the grey connector are ground.