10444994

1.

Possible DTC: P0190

Actual value for evaluation : Engine warm at approx. 80°C. Engine idling.

220 ~ 300 bar

260 bar

Rail pressure in limp home mode (fault state) :

Approx. 400 bar

Vehicle can be driven in limp home mode.

＊ CC-CODE

(1)

C001 (Signal below the lower limit- No signal)

A.

Possible causes of trouble:

Open circuit, contact resistance, or short circuit to GND line

RPS defective

ECU - sensor supply voltage 2 : DTC1527 C001

(2)

C002 (Signal above the upper limit)

A.

Possible causes of trouble:

Short circuit to Bat(+) line

RPS defective

ECU - sensor supply voltage 2 : DTC1527 C002

(3)

C003 (General error)

Rail pressure sensor error is determined by comparison of rail pressure regulator operation current value to rail pressure sensor output.

A.

Possible causes of trouble:

Short circuit to Bat(+) line or to GND

ECU - sensor supply voltage 2 : DTC1527

The CC-Code from this error reports the error source.

2.

Measure the supply voltage of RPS with ignition on. Pin 3(+) to pin 1(-)

4.5 ~ 5.5V

3.

Signal voltage measurement

If supply voltage set value is attained, measure the voltage from pin 2 to GND with ignition on.

Set value : Approx. 0.5V

Engine idling set value : 1V

Voltage increases with increasing pressure : Max. 4.5V

4.

If set values are attained : Ignition off, pull off the plug of control unit and sensor. Then check the following wiring for open/ short circuit.

ECU

CMP

Pin 90

Pin 92

Pin 3

Pin 1

5.

If the signal voltage set value is not attained, replace RPS.

6.

Note the followings

(1)

Always renew the sealing washer (soft iron sealing ring) even if the old sensor is re-used

(2)

When removing seal, take care not to damage sealing surface.

(3)

When installing RPS, apply sealing washer with grease if necessary.

(4)

Replace the faulty fuel rail assembly in case of new model vehicle within a year, or replace the faulty parts of vehicle of which model year is morethan a year.

35 ± 2Nm