Sudden crank no start issue

Hello,

This could be a problem with your vehicle's Body Control Module (BCM) or the wires going to it. In the diagrams down below I have included a description of how your vehicle's ignition system works as well as wiring diagrams of the starting circuit. I have also included a diagram of the BCM Connector and a guide on how to properly test electrical connectors. You will need to use a multi-meter to do this, so I have included this link below if you are unfamiliar with how to use one.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Can you please take a voltage reading at Pin #2(White Wire) of the body control connector with a helper turning the vehicle's ignition switch to the "start" position and get back to us with what you find out.

Thanks,
Alex
2CarPros

Hello again,

Okay, so what was the voltage reading at Pin #2 of the connector X1 at BCM? Remember, you want a helper turning the ignition key to the "start" position when you are doing this.

Thanks,
Alex
2CarPros

Hello again,

It's the light green connector. The white wire on the top left is the wire/pin we are testing. Please get back to us with the voltage reading.

Thanks,
Alex
2CarPros

Hello again,

Okay, that looks good, we were looking for battery voltage. So next let's test the Crankshaft Position Sensor (CKP). In the diagrams down below I have included the factory diagnostic guide for testing the CKP and its location on the vehicle. Please go through this guide and get back to us with what you find out.

Thanks,
Alex
2CarPros

Hello again,

Test the wires coming out of Pin #16 (pink wire) and #47 (gray wire) of the Fuel Pump Flow Control Module to the Fuel Pump. Check the wires for opens. I have included instructions for you in the diagrams down below. If the wires check out okay, then the problem is going to be in the Fuel Pump Flow Control Module. I have included the fuel pump wiring diagrams and the instructions for the removal and installation of the Fuel Pump Flow Control Module as well as a guide for finding Open Circuits in an electrical circuit for you, also, in the diagrams down below. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Hello again,

Actually, it does. I didn't realize that the component was replaced, otherwise I would got to this sooner. In the diagrams down below I have included what the vehicle manufacturer has to say on the subject, but it looks like something that the dealer is going to have do. Please keep us informed.

Thanks,
Alex
2CarPros

Hello again,

What was wrong with it in the first place? The Fuel Pump Flow Control Module acts as the fuel pump relay. I have included a description of it's operation in the diagrams down below for you. I have previously sent you a wiring diagram of the fuel pump system of your vehicle. It will have all the components of the fuel pump system on it. Please get back to us.

Thanks,
Alex
2CarPros

Hello again,

I understand. Why did you originally replace the Fuel Pump Flow Control Module for?

Thanks,
Alex
2CarPros

Hello again,

Well it very well could be the original problem, but according to the vehicle manufacturer, the Fuel Pump Flow Control Module does need to be programmed for it to work properly. What was the original problem?

Thanks,
Alex
2CarPros

Hello,

In the diagrams down below I have included the factory description for programming after replacement of the Fuel Pump Flow Control Module. Please go through it and keep us informed as to how things are progressing.

Thanks,
Alex
2CarPros