Component Location
Description

The FPR (Fuel Pressure Regulator) sets the correct pressure in the rail as a function of engine, loading and maintains it at this level.

If the rail pressure is excessive, the pressure control valve opens and a portion of the fuel returns from the rail to the fuel tank via a collector line.

If the rail pressure is too low, the pressure control valve closes and seals off the high pressurestage from the low pressure stage.

In case of the fuel pressure regulator failure, the engine symptoms will occur the shut down and the starting impossible.

If the FPR circuit generates threshold value, the ECM judged this as a fault and DTC is set.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Circuit continuity check

● Shrt to battery in power circuit

● Short to battery in control circuit

● Faulty FPR

● Faulty ECM

Enable Conditions

● Engine run

Threshold Value

● Short for fuel pressure regulator circuit.

Diagnostic Time

● 0.3 sec.

MIL

Fuel Limit

Fuel Cut

EGR Off

● Yes

● No

● Yes

● No

Specification

Fuel Pressure Regulator

Resistance

2.07 ~ 2.53 Ω at 20°C

Schematic Diagram
Signal Waveform
Яндекс.Метрика