DTC P0087: Fuel Rail / System Pressure - Too Low: Procedure

1. Check around and beneath the car for fuel leaks, fumes, etc.

   OK

   No fuel leaks present.

NG → REPAIR OR REPLACE FUEL SYSTEM 

OK: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Clear DTCs.
4. Start the engine.
5. Enter the following menus: Powertrain / Engine / Trouble Codes.
6. Read the DTCs using Techstream.

   Result

   Display (DTC output)	Proceed to
   P0087	A
   P0087 and other DTCs	B

   HINT: 

   If any codes other than P0087 are output, perform troubleshooting for those DTCs first.

B → GO TO DTC CHART 

A: Go to next step 

1. Has the vehicle run out of fuel in past ?

YES → DTC CAUSED BY RUNNING OUT OF FUEL 

NO: Go to next step 

1. Connect Techstream to the DLC3.
2. Start the engine and warm up the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Way / Direct. (Procedure "A")
5. Allow the engine to idle.
6. Monitor all of the misfire rate values that are displayed on the tester (example: Cylinder #1). If no misfire counts occur for any of the cylinders, perform the following procedure: (Procedure "B")
   1. Shift the gear selector lever to the D position.
   2. Repeat procedure "A" to "B" above.
   3. Monitor all of the misfire rate values that are displayed on the tester (example: Cylinder #1).

      Result

      Misfire Count	Proceed to
      No misfire counts, or misfire counts occur randomly in all cylinders	A
      Misfire counts occur in particular cylinder	B

B → REPLACE FUEL INJECTOR FOR DIRECT INJECTION 

A: Go to next step 

1. Connect Techstream to the DLC3.
2. Start the engine.
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine / Active Test / Control the Target Fuel Pressure / Fuel Press.
5. Check that the fuel pressure fluctuates when the target fuel pressure changes.

   HINT: 

   The Control the Target Fuel Pressure operation lowers the target fuel pressure by 12.5% or increase the target fuel pressure by 24.8%.

   Result

   Inspection Result	Proceed to
   Fuel pressure does not fluctuate	A
   Fuel pressure fluctuates in accordance with tester operation	B
   Fuel pressure pulsates	C

A → REPLACE FUEL PRESSURE SENSOR 

B → See step   8 

C: Go to next step 

1. Check the fuel pump operation. Refer to ON-VEHICLE INSPECTION - Step 1 .

NG → REPLACE FUEL PUMP 

OK: Go to next step 

1. Check the fuel pressure (low pressure side). Refer to ON-VEHICLE INSPECTION - Step 2 .

NG → REPLACE FUEL PRESSURE REGULATOR 

OK: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn Techstream on.
3. Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
4. Start the engine.
5. Check that the fuel pressure fluctuations when the engine switch is turned off.

   HINT: 

   Turn the engine switch off and on (IG) before checking the fuel pressure.

   Fig 1: View Of Fuel Pressure Fluctuation Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result

   Inspection Result	Proceed to
   Fuel pressure is almost constant, or fluctuations are gradual	A
   Fuel pressure drops suddenly	B

A → See step   10 

B: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn Techstream on.
3. Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
4. Start the engine.
5. Check the fuel pressure fluctuations when the fuel hose is pressed with your fingers.

   Result

   Inspection Result	Proceed to
   Pressing the hose raises the fuel pressure slightly	A
   Fuel pressure does not fluctuate	B

A → REPLACE RELIEF VALVE 

B: Go to next step 

NEXT: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Clear DTCs.
4. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
5. Enter the following menus: Powertrain / Engine / Trouble Codes.
6. Read the DTCs.

   Result

   Display (DTC output)	Proceed to
   P0087	A
   No output	B

B → END 

A → See step   12