PurgeControl Solenoid Valve, Canister Close Valve, RCV Control Solenoid Valve, Fuel Pump Relay, E/R Junction Block (Cooling Fan High Relay, Fuel Pump Relay), [G4KJ/G4KH] Variable Intake Solenoid Valve, Oil Control Valve (Exhaust), [G4FJ] Oil Control Valve #1/#2 (Intake/Exhaust) 1 ECU: 10A: PCM/ECM:
FuelPump Relay, Powertrain Control Module: 18- -19: 7.5: Remote Controlled Mirror (Mirror Heater) 20: 7.5: A/C Compressor Clutch Relay, A/C-ECU, Blower Relay, Condenser Fan Motor, Fan Control Relay, Front-ECU, Heated Seat Relay, Outside/Inside Air Selection Damper Control Motor, Radiator Fan Relay, Rear Window Defogger Relay:
Thisrange has been set by the car's manufacturer. When the PCM makes the determination that the fuel rail pressure sensor is outside of the predetermined range, it stores the P0190 trouble code and the Check Engine Light comes on. What causes the P0190 code? Bad fuel pump; Bad fuel pump driver/relay; Bad fuel rail pressure sensor; Clogged
FuelPump: 23: 15A: Charging System: 24: 20A: Auxiliary Power Outlet: 25: 30A: Passenger Seat (Long Wheel Base Only) 26: 30A: Cooling Fan-Low Speed (Circuit Breacker) 27: 20A: Anti-Lock Brakes: 28 — PCM Diode: 29 — Not used: Relays: 1 — Fuel Pump Relay: 2 — A/C Clutch Relay: 3 — PCM Power Relay: 4 — Air Suspension Relay: 5 — Rear

Thefollowing is a simple electrical diagram showing how power is supplied to the fuel pump. It is important to note that the fuel pump relay is "triggered" by the vehicle's DME (engine control unit); when the key in the car's ignition is turned to start the vehicle, the DME supplies a ground to the relay, allowing power from the battery to flow to the fuel pump.

Gasoline Powertrain Control Module, Fuel Pump Relay; Diesel: Engine Control Module, Powertrain Control Module, Fuel Pump Relay, 4: 20: Junction Block ((Passenger Compartment) Combination Flasher) 5: 20: Stop Lamp Switch, Electric Brake Provision, Center High Mounted Stop Lamp, Turn Signal/Hazard Switch: 6: 30:
NuVD.
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    • when a fuel pump relay is bad