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

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

   OK

   No gasoline 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 and ECT / 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 the past?

YES → DTC CAUSED BY RUNNING OUT OF FUEL 

NO: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Enter the following menus: Powertrain / Engine and ECT / Data List / Misfire / Cylinder #1 Misfire Count, #2, #3, #4, #5 and #6.
4. Allow the engine to idle.
5. Read each value of CYL #1 to #6 displayed on the tester.
6. Check if there is a particular cylinder that the misfire count is concentrated on.

   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 

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 and ECT / Data List / Fuel Press.
5. Check that the fuel pressure fluctuates when the engine condition changes from idling to racing.

   Result

   Inspection Result	Proceed to
   Fuel pressure does not fluctuate	A
   Fuel pressure fluctuates	B
   Fuel pressure does not rise	C

B → See step   8 

A → REPLACE FUEL PRESSURE SENSOR 

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 and ECT / 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: 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 and ECT / 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 

1. Replace the fuel pump for high pressure. Refer to COMPONENTS .

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. Start the engine.
5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
6. Read the DTCs using Techstream.

   Result

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

B → END 

A → REPLACE ECM