13150489-13150487-13150502-13150504-13150508-13150484-13150494-13150491-13150498-13150496-13150500

Component Location

General Description

RPS(Rail Pressure Sensor), consists of piezzo electric element, measures rail pressure inside of common rail.

ECM determines optimum fuel injection quantity at specific engine condition based on RPS signal. RPS signal is also used as rail pressure regualtor feed back signal in order to achieve optimum rail pressure at certain engine condition.

DTC Description

P0192 is set when RPS output voltage is below the minimum value of 254mV for more than 0.2 sec.. This code is due to the open in power circuit or the short to ground in signal circuit.

DTC Detecting Condition

Item	Detecting Condition			Possible Cause
DTC Strategy	● Voltage monitoring			● RPS circuit ● RPS component
Enable Conditions	● Engine running
Threshold Value	● Output sinal below minimum value (below 189mV)
Diagnostic Time	● 200ms
Fail Safe	Fuel cut	NO	● Rail press. Sensor value fixed at 330bar
	EGR Off	NO
	Fuel Limit	YES
	Check Lamp	YES

Specification

Diagnostic Circuit Diagram

Signal Waveform

Fig.1) This waveform shows the rise of RPS output voltage at rapid acceleration.

Monitor GDS Data

Connect GDS to Data Link Connector (DLC).

Warm engine up to normal operating temperature.

Measure the waveform of "Rail pressure sensor".

Fig.1) This waveform shows the rise of RPS output voltage at rapid acceleration.

Terminal and Connector Inspection

Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damge of component.

Perform checking procedure as follows.

(1)

Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.

(2)

Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking device and connecting condition between terminal and wiring.

note

Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition. ( after checking, reconnect the pin at correct position. )

Is the problem found?

	▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
	▶ Go to "Power Circuit Inspection".

Power Circuit Inspection

IG KEY "OFF", ENGINE "OFF".

Disconnect RPS connector.

IG KEY "ON".

Measure the voltage between power terminal of RPS harness connector and chassis ground.

Specification : 4.8V~5.1V

Is the measured voltage within the specification?

▶ Go to "Signal Circuit Inspection".

▶ Repair open in RPS power circuit and go to "Verification of Vehicle Repair".

[ Check between power terminal of RPS harness connector and ECM harness connector.]

Signal Circuit Inspection

Check signal circuit voltage

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect RPS connector.

(3)

IG KEY "ON".

(4)

Measure the voltage between signal terminal of RPS harness connector and chassis ground.

Secification : 4.8V~5.1V

(5)

Is the measured voltage within the specification?

	▶ Go to "Component Inspection".
	▶ Repair short to ground in signal circuit and go to "Verification of Vehicle Repair".

Component Inspection

Visual Inspection of RPS

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Disconnect RPS connector.

(3)

Check if corrosion and damage in RPS terminal is detected.

(4)

Check RPS mounting torque and oil leakage.

(5)

Are the problems relevant to RPS found?

	▶ Replace RPS if necessary and go to "Verification of Vehicle Repair".
	▶ Go to "RPS waveform Inspection".

RPS Waveform Inspection

(1)

IG KEY "OFF", ENGINE "OFF".

(2)

Connect RPS connector.

(3)

Connect an Oscilloscope to signal teminal of RPS connector.

(4)

After turning engine "ON", Check waveform at idle and during acceleration.

Specification : Refer to "Signal Waveform & Data" of "General Information".

(5)

Does RPS waveform look similar to standard "Signal Waveform & Data"?

	▶ Go to "Verification of Vehicle Repair".
	▶ Replace RPS and go to "Verification of Vehicle Repair".

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault is corrected.

After connecting GDS select "Diagnostic Trouble Codes(DTCs)" mode to and then clear DTC.

Drive the vehicle within DTC Enable conditions in General information.

After selecting "Diagnostic Trouble Codes(DTCs)" mode and check DTC is recorded again.

Are any DTCs recorded ?

	▶ Go to the DTC guide of recorded NO. in GDS.
	▶ System operates within specification.