Dtc P0087 Fuel Rail / System Pressure - Too Low

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 COMMON RAIL ASSEMBLY (FOR BANK 1) (FUEL PRESSURE SENSOR)

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

DESCRIPTION

HINT:

1. Check Common Rail Pressure and compare it to Target Common Rail Pressure in the Data List by entering the following menus: Engine and ECT / Data List / Common Rail Pressure, Target Common Rail Pressure. Under stable conditions, the difference between Common Rail Pressure 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 (Click here).
   
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, "Common Rail Pressure" 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 assembly 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 27000 to 37000 kPa (275 to 377 kgf/cm², 3915 to 5365 psi) when idling, and it increases to approximately 50000 to 70000 kPa (510 to 714 kgf/cm², 7250 to 10150 psi) when running the engine at 2500 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.
      
      
      
      
      
      

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

INSPECTION PROCEDURE

NOTICE:

1. After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
   
2. After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).
   
3. After replacing an injector assembly, the ECM needs registration (Click here).
   

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 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.
   

1. Connect the GTS to the DLC3.
   

2. Turn the ignition switch to ON and turn the GTS on.
   

3. Enter the following menus: Engine and ECT / Trouble Codes.
   

4. Read the DTCs.
   
   

   Result

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

1. Disconnect the fuel pressure sensor connector.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   
   

   for LHD

   Tester Connection	Condition	Specified Condition
   C82-2 (PR) - C45-72 (PCR1)	Always	Below 1 Ω
   C82-3 (VC) - C45-118 (VCM)	Always	Below 1 Ω
   C82-1 (E2) - C45-95 (E2M)	Always	Below 1 Ω
   C82-2 (PR) or C45-72 (PCR1) - Body ground	Always	10 kΩ or higher
   C82-3 (VC) or C45-118 (VCM) - Body ground	Always	10 kΩ or higher

   
   

   for RHD

   Tester Connection	Condition	Specified Condition
   C82-2 (PR) - C46-72 (PCR1)	Always	Below 1 Ω
   C82-3 (VC) - C46-118 (VCM)	Always	Below 1 Ω
   C82-1 (E2) - C46-95 (E2M)	Always	Below 1 Ω
   C82-2 (PR) or C46-72 (PCR1) - Body ground	Always	10 kΩ or higher
   C82-3 (VC) or C46-118 (VCM) - Body ground	Always	10 kΩ or higher

1. Disconnect the fuel pressure sensor connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   C82-3 (VC) - C82-1 (E2)	Ignition switch ON	4.5 to 5.5 V

   Text in Illustration

   *a	Front view of wire harness connector (to Fuel Pressure Sensor)

1. Replace the common rail assembly (for bank 1) (Click here).
   

1. Bleed the air from the fuel system (Click here).
   

   HINT:

   When fuel lines are disconnected, air may enter the fuel lines, leading to engine starting trouble. Therefore, perform forced regeneration and bleed the air from the fuel lines.

1. Connect the GTS to the DLC3.
   

2. Turn the ignition switch to ON and turn the GTS on.
   

3. Clear the DTCs (Click here).
   

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

5. Enter the following menus: Engine and ECT / Trouble Codes.
   

6. Read the DTCs.
   
   

   Result

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

1. Replace the ECM (Click here).
   

1. Repair or replace the harness or connector.
   

1. Connect the GTS to the DLC3.
   

2. Clear the DTCs (Click here).
   

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

4. Turn the ignition switch to ON.
   

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

6. Confirm that the DTC is not output again.
   

   HINT:

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

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

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

   3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or N/A, increase the idling time.