DTC Code | DTC Name |
---|---|
P0087 | Fuel Rail / System Pressure - Too Low |
P0190 | Fuel Rail Pressure Sensor Circuit |
P0192 | Fuel Rail Pressure Sensor Circuit Low Input |
P0193 | Fuel Rail Pressure Sensor Circuit High Input |
DESCRIPTION
The ECM monitors the internal fuel pressure of the common rail assembly using the fuel pressure sensor, and controls the suction control valve to regulate the common rail internal pressure to the target pressure determined by the ECM. The pressure sensor is a semiconductor that varies its electrical resistance when pressure is applied to its silicon chip. This sensor outputs a voltage in proportion to the common rail internal fuel pressure.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0087 | Fuel Rail / System Pressure - Too Low | Fuel pressure sensor output voltage stays at fixed value for 90 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
P0190 | Fuel Rail Pressure Sensor Circuit | Fuel pressure sensor output voltage is 0.55 V or less, or 4.9 V or higher for 0.5 seconds (1 trip detection logic). |
Tip:
Trouble areas are related to the electrical system only (pumps are not involved) |
Comes on | DTC stored |
P0192 | Fuel Rail Pressure Sensor Circuit Low Input | Fuel pressure sensor output voltage is 0.55 V or less for 0.5 seconds (1 trip detection logic). |
Tip:
Trouble areas are related to the electrical system only (pumps are not involved) |
Comes on | DTC stored |
P0193 | Fuel Rail Pressure Sensor Circuit High Input | Fuel pressure sensor output voltage is 4.9 V or higher for 0.5 seconds (1 trip detection logic). |
Tip:
Trouble areas are related to the electrical system only (pumps are not involved) |
Comes on | DTC stored |
DTC No. | Data List |
---|---|
P0087 |
|
P0190 | |
P0192 | |
P0193 |
Check Fuel Press compared to Target Common Rail Pressure in the Data List by entering the following menus: Powertrain / Engine and ECT / Data List / All Data / Fuel Press, Target Common Rail Pressure. Under stable conditions, the difference between Fuel Press and Target Common Rail Pressure is within +/-5000 kPa.
For more information on the fuel pressure sensor and common rail system, refer to the System Description.
Click hereНажмите здесь
If DTC P0087 is stored, the following symptoms may appear:
Black smoke
Poor drivability
Lack of power
Lack of power due to accelerator restriction of fail-safe function
If DTC P0190, P0192 and/or P0193 is stored, the following symptoms may appear.
Lack of power due to accelerator restriction of fail-safe function
If DTC P0190, P0192 and/or P0193 is stored, "Fuel Press" always displays 0 kPa or 200000 kPa.
MONITOR DESCRIPTION
Under normal conditions, the internal fuel pressure of the common rail usually fluctuates 1000 to 2000 kPa (10 to 20 kgf/cm2, 145 to 290 psi) even when the driving conditions are constant. This DTC is stored if there is no fluctuation of the fuel pressure. The internal fuel pressure is approximately 27000 to 45000 kPa (275 to 459 kgf/cm2, 3915 to 6525 psi) when idling, and it increases to approximately 44000 to 78000 kPa (449 to 795 kgf/cm2, 6380 to 11310 psi) when running the engine at 3000 rpm.
If this DTC is stored, the ECM enters fail-safe mode and limits engine power. The fail-safe mode continues until the ignition switch is turned off.
The diagram below indicates that fuel pressure rises as engine speed increases, but for the malfunction indicated by this DTC, that does not happen.
These DTCs are stored if the fuel pressure sensor output voltage is out of the standard range due to an open or short malfunction of the sensor circuit.
If these DTCs are stored, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned off.
CONFIRMATION DRIVING PATTERN
DTC No. | DTC Detection Drive Pattern |
---|---|
P0087 | After idling for 60 seconds, repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds |
P0190 | Ignition switch ON for 1 second |
P0192 | |
P0193 |
WIRING DIAGRAM
*a | Fuel Pressure Sensor (Built into Common Rail Assembly) |
CAUTION / NOTICE / HINT
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
CHECK DTC OUTPUT
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Powertrain > Engine and ECT > Trouble CodesResult | ||||||
---|---|---|---|---|---|---|
|
B | Нажмите здесь |
GO TO STEP 4 |
A |
CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)
Disconnect the fuel pressure sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL PRESSURE SENSOR)
Disconnect the fuel pressure sensor connector.
*a |
Front view of wire harness connector (to Fuel Pressure Sensor) |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
GO TO STEP 7 |
OK |
REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)
Replace the common rail assembly.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
BLEED AIR FROM FUEL SYSTEM
Bleed the air from the fuel system.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0190, P0192, P0193)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsLet the engine idle for 60 seconds, and then repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Powertrain > Engine and ECT > Trouble CodesResult | ||||||
---|---|---|---|---|---|---|
|
B |
END |
A |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 9 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Repair or replace the harness or connector.
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off for 30 seconds or more.
Turn the ignition switch to ON.
Let the engine idle for 60 seconds, and then repeat quick engine speed accelerations (to 2500 rpm) for 30 seconds.
Turn the GTS on.
Confirm that the DTC is not output.
Perform the following procedure using the GTS to determine whether or not the DTC judgment has been carried out.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Powertrain > Engine and ECT > UtilityTester Display |
---|
All Readiness |
Input DTC P0087, P0190, P0192 and/or P0193.
Check that STATUS is NORMAL. If STATUS is INCOMPLETE or N/A, increase the idling time.
Result | ||
---|---|---|
|
NEXT |
END |