Component Location
General Description

Rail pressure regulator valve is installed in common rail and controls common rail pressure fast as regulating returning quantity of fuel which is delivered to common rail when fast rise of rail pressure is required like the moment of turning engine ON or when fast relief of pressure is required like at the point of deceleration.

The lower Rail pressure regulator valve current is, the more fuel is supplied to common rail. Thus it leads rail pressure to be high. On the contrary, the higher Rail pressure regulator valve current is, the less fuel is supplied to common rail.

DTC Description

P0089 is set when excessive current in control circuit of Rail pressure regulator valve(integrated with high common rail) is detected for more than 0.22 sec.. This code is due to short to battery in control circuit orRail pressure regulator valve internal short.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Voltage monitoring

● Rail pressure regulator valve circuit

● Rail pressure regulator valve component

Enable Conditions

● IG KEY "ON"

Threshold Value

● Short to battery (control circuit of Rail pressure regulator valve)

Diagnostic Time

● 220ms

Fail Safe

Fuel Cut

YES

EGR Off

NO

Fuel Limit

NO

Check Lamp

YES

Specification

Rail pressure regulator valve resistance

Operating frequancy

3.42 ~ 3.78Ω (20℃)

1000Hz(1KHz)

Schematic Diagram
Signal Waveform
Яндекс.Метрика