CFMoto CForce cranks but won't start: tip-over sensor and fuel pump

Applies to: CFMoto CForce 400, 450, 500, 600, 625 and 1000 (EFI)

Symptoms

  • Cranks strongly but never fires
  • No fuel pump hum when you turn the key on
  • Happened after a rollover or tip

Why it happens

EFI ATVs cut fuel and spark if the tip-over (lean angle) sensor trips, the kill switch is off, or the fuel pump relay or fuse fails. After a tip, the sensor may need the key cycled to reset.

How to fix it

  1. Check the kill switch is on, then cycle the key off and on.
  2. Listen for the fuel pump to prime for a few seconds at key-on.
  3. Check the EFI and fuel pump fuses and relay.
  4. Test the tip-over sensor connector and mounting per the manual.
  5. Check for fault codes on the display.

Tools and parts

  • Multimeter
  • Fuses and relay

What the factory service manual covers

EFI system: fuel pump circuit, tip-over sensor test, fault codes, wiring diagrams. The full procedure, specs and wiring diagrams are in the factory service manual for your machine.

Get the factory service manual

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