Dtc P0087 Fuel Rail / System Pressure - Too Low

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)

CHECK ECM (FUEL PRESSURE SENSOR VOLTAGE)

REPLACE FUEL PRESSURE SENSOR (COMMON RAIL ASSEMBLY)

BLEED AIR FROM FUEL SYSTEM

CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0190, P0192, P0193)

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0087 Fuel Rail / System Pressure - Too Low

DTC P0190 Fuel Rail Pressure Sensor Circuit

DTC P0192 Fuel Rail Pressure Sensor Circuit Low Input

DTC P0193 Fuel Rail Pressure Sensor Circuit High Input


DESCRIPTION

The ECM monitors the internal fuel pressure of the common rail using the fuel pressure sensor, and controls the suction control valve to regulate the internal pressure so that it reaches the target pressure. The pressure sensor is a semiconductor that varies electrical resistance when pressure is applied to its silicon chip. This sensor outputs a voltage in proportion to the internal fuel pressure.

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0087 Fuel Rail / System Pressure - Too Low


P0087
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
After idling for 60 seconds, quickly increase engine speed to 2500 rpm repeatedly for 30 seconds
Fuel pressure sensor output voltage stays at fixed value for 90 seconds (1 trip detection logic).
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor (common rail assembly)
  3. Ran out of fuel
  4. Fuel frozen
  5. ECM

P0190
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 1 second
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).
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor (common rail assembly)
  3. ECM
HINT:
Trouble areas are related to the electrical system only (pumps are not involved)

P0192
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 1 second
Fuel pressure sensor output voltage is 0.55 V or less for 0.5 seconds (1 trip detection logic).
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor (common rail assembly)
  3. ECM
HINT:
Trouble areas are related to the electrical system only (pumps are not involved)

P0193
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 1 second
Fuel pressure sensor output voltage is 4.9 V or higher for 0.5 seconds (1 trip detection logic).
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor (common rail assembly)
  3. ECM
HINT:
Trouble areas are related to the electrical system only (pumps are not involved)

Related Data List
DTC No.
Data List
P0087
  1. Fuel Press
  2. Target Common Rail Pressure
P0190
P0192
P0193
HINT:
  1. Check Fuel Press and compare it to Target Common Rail Pressure in the Data List by entering the following menus: Powertrain / Engine and ECT / Data List / Fuel Press, Target Common Rail Pressure. Under stable conditions, the difference between Fuel Press and Target Common Rail Pressure is 5000 kPa or less.
  2. For more information on the fuel pressure sensor and common rail system, refer to System Description (HILUX_TGN26 RM000000XSN01XX.html).
  3. If DTC P0087 is stored, the following symptoms may appear:
    1. Black smoke
    2. Poor drivability
    3. Lack of power
    4. Lack of power due to accelerator restriction performed by fail-safe function
  4. If DTC P0190, P0192 and/or P0193 is stored, the following symptom may appear:
    1. Lack of power due to accelerator restriction performed by fail-safe function
  5. If DTC P0190, P0192 and/or P0193 is stored, "Fuel Press" always displays 0 kPa or 200000 kPa.

MONITOR DESCRIPTION

  1. P0087 (Fuel pressure sensor output stays at fixed value):
    1. Under normal conditions, the internal fuel pressure of the common rail usually fluctuates by 1000 to 2000 kPa (10 to 20 kgf/cm2, 145 to 290 psi) even when driving conditions are constant. This DTC is stored if there is no fluctuation of the fuel pressure. The internal fuel pressure is approximately 28000 to 40000 kPa (285 to 408 kgf/cm2, 4060 to 5801 psi) when idling, and it increases to approximately 30000 to 60000 kPa (306 to 612 kgf/cm2, 4351 to 8700 psi) when running the engine at 3000 rpm.
      If this DTC is stored, the ECM enters fail-safe mode and limits engine power. The ECM continues operating in fail-safe mode until the ignition switch is turned off.

    2. The diagram below indicates that fuel pressure rises as engine speed increases, but for the malfunction indicated by this DTC, that does not happen.


      Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0087 Fuel Rail / System Pressure - Too Low

  1. P0190, P0192 and P0193 (Open or short in fuel pressure sensor circuit):
    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 ECM continues operating in fail-safe mode until the ignition switch is turned off.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0087 Fuel Rail / System Pressure - Too Low


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK042X.html) and initialization (HILUX_TGN26 RM000000TIN04EX.html).
HINT:
  1. If DTCs relating to different systems which share terminal E2 as their ground are stored, check this ground circuit first.
  2. Read freeze frame data using the intelligent tester. 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.
1.CHECK DTC OUTPUT

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0190, P0192 or P0193 is output
    		A
    P0087 is output
    		B


B
Go to step 4
A


2.CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)

  1. Disconnect the fuel pressure sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C16-5 (PR) - C22-26 (PCR1)
    		Always
    		Below 1 Ω
    C16-2 (PR2) - C22-33 (PCR2)
    		Always
    		Below 1 Ω
    C16-1 (VCS) - C23-2 (VCS)
    		Always
    		Below 1 Ω
    C16-6 (VC) - C22-18 (VC)
    		Always
    		Below 1 Ω
    C16-4 (E2) - C22-28 (E2)
    		Always
    		Below 1 Ω
    C16-3 (E2S) - C23-1 (E2S)
    		Always
    		Below 1 Ω
    C16-5 (PR) or C22-26 (PCR1) - Body ground
    		Always
    		10 kΩ or higher
    C16-2 (PR2) or C22-33 (PCR2) - Body ground
    		Always
    		10 kΩ or higher
    C16-1 (VCS) or C23-2 (VCS) - Body ground
    		Always
    		10 kΩ or higher
    C16-6 (VC) or C22-18 (VC) - Body ground
    		Always
    		10 kΩ or higher
    C16-4 (E2) or C22-28 (E2) - Body ground
    		Always
    		10 kΩ or higher
    C16-3 (E2S) or C23-1 (E2S) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the fuel pressure sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 8
OK


3.CHECK ECM (FUEL PRESSURE SENSOR VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0087 Fuel Rail / System Pressure - Too Low

  1. Disconnect the fuel pressure sensor connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C16-6 (VC) - C16-4 (E2)
    		Ignition switch ON
    		4.5 to 5.5 V
    C16-1 (VCS) - C16-3 (E2S)
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Fuel Pressure Sensor)

  1. Reconnect the fuel pressure sensor connector.



NG
Go to step 7
OK


4.REPLACE FUEL PRESSURE SENSOR (COMMON RAIL ASSEMBLY)

  1. Replace the common rail assembly (HILUX_TGN26 RM000002SY501SX.html).


NEXT


5.BLEED AIR FROM FUEL SYSTEM

  1. Bleed the air from the fuel system (HILUX_TGN26 RM000002SY8025X_01_0002.html).


NEXT


6.CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0190, P0192, P0193)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0T9X.html).

  1. Let the engine idle for 60 seconds, and then quickly increase the engine speed to 2500 rpm repeatedly for 30 seconds.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0087, P0190, P0192 or P0193 is output
    		A
    No DTC is output
    		B


B
END
A


7.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z0019X.html).



NEXT
Go to step 9

8.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


9.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0T9X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Turn the ignition switch to ON.

  1. Let the engine idle for 60 seconds, and then quickly increase the engine speed to 2500 rpm repeatedly for 30 seconds.

  1. Confirm that the DTC is not output again.

    HINT:
    Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0087, P0190, P0192 and/or P0193.

    3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, increase the idling time.


NEXT

END