Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Chart A-5, Cranks But Won't Run: Notes
With ignition on, ECM will activate fuel pump relay and operate fuel pump for 2 seconds. If ECM receives ignition reference pulses, fuel pump will continue to operate. If no ignition reference pulses are received, fuel pump will be turned off. The ECM is located below left side of instrument panel.
- Fuel pump should operate for approximately 2 seconds with ignition on.
- This checks for open circuit between fuel pump relay and ignition fuse.
- This checks for open circuit or defective ECM fuel pump driver.
- Installing jumper wire will verify if fuel pump and power circuit are okay.
- This determines if ECM fuel pump driver circuit is defective.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.