Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello and welcome!My name isCustomerand I can assist you with your question.
I am very sorry your having this issue with your vehicle.
I will try my best to answer all of your questions.
However, before we get started, please let me mention a few things.
1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.
2. If you dont understand any technical terms or anything that I mention (component tests or theory or operation), please let me know and I will provide you with a more in debt explanation or answer.
3. Please understand that I am here to help you any way I can.
Can I start by getting your VIN and any stored codes in the computer?
Thank you for that information Alex.
It would be best to speak over the phone. I can lower the cost of the phone call down to 5 bucks in order to better help you. I can speak on the phone right now and follow up phone calls are free.
Does that sound fair?
So is the anti theft light on or flashing with the key on or when cranking it over?
So your saying there is a security light with the key on correct?
SO the security light is on but there are no stored codes in the computer?
Did you check the BCM for codes?
If the vehicle is not starting due to the security system, there should be a stored code in the computer related to this.
YES, it sure sounds like a failed passlock sensor.
When testing the inputs to the sensor,
With your voltmeter, check the voltage from the Black wire to the White wire, backprobing with the sensor connected. It should have 9.0 V or higher at: IGN 0, IGN 1 and CRANK.
Then test voltage on the Yellow signal wire and it should have 4.7-5.0 V at: IGN 0, and then a drop to a specific value should occur as the key is rotated to IGN 1 and/or CRANK.
If all inputs check out ok, this leaves a faulty passlock sensor.
I am just checking in to see how things are going and to see if you need any further assistance?
If so, please let me know as I will be happy to help.