Fuel Pressure Release: Service and Repair
FUEL SYSTEM PRESSURE RELEASEWARNING:
- Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury.
- Fuel in the fuel system remains under high pressure, even when the engine is not running. Before servicing or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel, causing personal injury or a fire hazard.
All vehicles except Hybrid
1. Remove the fuel pump relay.
Hybrid
2. With the vehicle in NEUTRAL, position it on a hoist.
3. Disconnect the fuel pump driver module electrical connector.
All vehicles
4. Start the engine and allow it to idle until it stalls.
5. After the engine stalls, crank the engine for approximately 5 seconds to make sure the fuel injection supply manifold pressure has been released.
6. Turn the ignition switch to the OFF position.
All vehicles except Hybrid
7. When fuel system service is complete, install the fuel pump relay.
Hybrid
8. Connect the fuel pump driver module electrical connector.
All vehicles
9. NOTE: It may take more than 1 key cycle to pressurize the fuel system.
Cycle the ignition key and wait 3 seconds to pressurize the fuel system. Check for leaks before starting the engine.
10. Start the vehicle and check the fuel system for leaks.