Center Air Bag Sensor Assembly (Camry 2.2L CNG Models, Celica, Corolla, Highlander, MR2, RAV4, Sequoia & Sienna)
Center air bag sensor assembly delivers an input signal to Engine Control Module (ECM) if an airbag is deployed. If ECM detects that air bags are deployed, ECM will stop fuel pump operation by opening the circuit opening relay. This operation is referred to as fuel cut control. If fuel cut control has been activated, turning ignition switch from OFF position to ON position cancels the fuel cut control operation and fuel pump will operate. Center air bag sensor assembly may also be referred to as air bag sensor assembly.
Center Air Bag Sensor Assembly (Prius)
Center air bag sensor assembly delivers an input signal to Hybrid Vehicle (HV) control Electronic Control Unit (ECU) if an airbag is deployed. Hybrid vehicle control ECU is referred to as HV ECU. The HV ECU then delivers input signal to Engine Control Module (ECM). If air bags are deployed, ECM will stop fuel pump operation by opening the circuit opening relay. This operation is referred to fuel cut control. If fuel cut control has been activated, turning ignition switch from OFF position to ON position cancels the fuel cut control operation and fuel pump will operate. Center air bag sensor assembly may also be referred to as air bag sensor assembly.
Fuel Manual Shutoff Valve & Fuel Filter Assembly (Camry 2.2L 4-Cyl. CNG Models)
Fuel manual shutoff valve can be used to shut off fuel supply from the fuel tank if a gas leak exists or when performing service procedures. Fuel manual shutoff valve is located near driver's side rear tire, underneath the vehicle, near fuel lines just below fuel tank, behind the rear seat. (Scheme 1) Rotating handle on fuel manual shutoff valve clockwise 90 degrees will close the valve and rotating the handle counterclockwise 90 degrees will open the valve.
Fuel filter assembly for CNG system is located below vehicle floor, next to fuel manual shutoff valve. (Scheme 1) Fuel filter assembly consists of a fuel filter body, fuel filter housing, fuel filter element and drain plug. (Scheme 1) Fuel filter element is located inside fuel filter housing and can be changed. Drain plug may be removed to allow water and oil to be drained from fuel filter assembly.
Scheme 1
Fuel Tank Valve Assembly (Camry 2.2L 4-Cyl. CNG Models)
Fuel tank valve assembly is located at end of fuel tank behind rear seat. see scheme 45 Fuel tank valve assembly contains fuel tank fuel shutoff valve, inlet check valve and relief valve.
Inlet check valve is used to prevent fuel leakage and is connected to the filler pipe. Inlet check valve remains closed by spring pressure and pressure of the gas in the fuel tank. When filling fuel tank, inlet check valve opens by pressure of incoming gas, then closes when filling is complete.
Relief valve is used to prevent damage to fuel tank by releasing excessive fuel pressure from fuel tank when fuel tank is exposed to abnormally hot temperatures. When fuel tank is exposed to abnormally hot temperatures, relief valve opens at specified temperature by melting, allowing excessive fuel pressure to be released by discharging gas through vent tube to the outside of the vehicle to prevent fuel tank from bursting.