Fuel injectors not working

2006 VOLVO S40

320,000 MILES • 2.4L • 5 CYL • 2WD • AUTOMATIC

CHRISSHEETS1

MEMBER
1 POST

Hi,

Car listed above will crank, getting fire and gas, but the injectors are not kicking on. Checked everything that I was supposed to, but everything comes back normal, but the injectors won’t come on, and I can’t figure it out.

Dec 5, 2021 at 9:11 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Hi,

Is fuse 32 in the under-hood fuse box good? If you checked it, did you also check for power to and from the fuse?

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Next, here is how it works. Power to all injectors is constant from fuse 32 with the key in the run or start position. From there, the PCM provides a ground path at specific times to each of the injectors to complete the circuit and fire the injector.

I attached the wiring schematic below showing the power supply. It's highlighted. If you are not getting power there, it's between the fuse and injectors. If you are getting power, then it sounds like there is no ground path being provided by the PCM.

Let me know what you find.

Take care,

Joe

See pics below. The last pic identifies fuse location.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Dec 5, 2021 at 10:01 AM