Dtc P0087 Fuel Rail / System Pressure - Too Low

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF FUEL PRESSURE SENSOR

CHECK IF DTC OUTPUT RECURS

CHECK WIRE HARNESS (FUEL PRESSURE SENSOR - ECM)

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 to the target pressure. The pressure sensor is a semiconductor that varies electrical resistance when pressure is applied to its silicon chip. This sensor outputs the voltage in proportion to the internal fuel pressure.

Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0087 Fuel Rail / System Pressure - Too Low


DTC No.
DTC Detection Condition
Trouble Area
P0087
Fuel pressure sensor output voltage stays at fixed value
(1 trip detection logic)
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor
  3. ECM
P0190
Fuel pressure sensor output voltage is 0.55 V or less, or 4.9 V or more for 0.5 seconds
(1 trip detection logic)
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor
  3. ECM
P0192
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
  3. ECM
P0193
Fuel pressure sensor output voltage is 4.9 V or more for 0.5 seconds
(1 trip detection logic)
  1. Open or short in fuel pressure sensor circuit
  2. Fuel pressure sensor
  3. ECM

УКАЗАНИЕ:
  1. For more information on the fuel pressure sensor and common rail system, refer to the system description (see page RAV4_ACA30 RM000000XSN006X.html).
  2. When DTC P0087, P0190, P0192 and/or P0193 is set, check the internal fuel pressure of the common rail by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / Fuel Press.

Reference:
Engine Speed
Fuel Pressure
Idling
Approximately 37 to 43 MPa
3,000 rpm (No engine load)
Approximately 60 to 66 MPa

MONITOR DESCRIPTION

  1. P0087 (Fuel pressure sensor output stays at fixed value):
    Under normal conditions, the internal fuel pressure of the common rail usually fluctuates 1 to 2 MPa (10 to 20 kgf/cm2, 145 to 290 psi) even when the driving conditions are constant. The internal fuel pressure is approximately 35 to 45 MPa (357 to 459 kgf/cm2, 5,076 to 6,525 psi) when idling, and it increases to approximately 58 to 68 MPa (592 to 694 kgf/cm2, 8,410 to 9,860 psi) when running the engine at 3,000 rpm. This DTC is set if there is no fluctuation of the fuel pressure.
    If this DTC is set, the ECM enters fail-safe mode and limits engine power. The fail-safe mode continues until the ignition switch is turned off.

    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0087 Fuel Rail / System Pressure - Too Low

  1. P0190, P0192 and P0193 (Open or short in fuel pressure sensor circuit):
    These DTCs are set if the fuel pressure sensor output voltage is out of the standard range and an open or short malfunction of the sensor circuit has occurred.
    If these DTCs are set, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned off.

MONITOR STRATEGY


P0087:
Required Sensors
Fuel pressure sensor
Frequency of operation
Continuous
Duration
1 second
MIL operation
1 driving cycle

P0190:
Required Sensors
Fuel pressure sensor
Frequency of operation
Continuous
Duration
0.5 seconds
MIL operation
1 driving cycle

P0192:
Required Sensors
Fuel pressure sensor
Frequency of operation
Continuous
Duration
0.5 seconds
MIL operation
1 driving cycle

P0193:
Required Sensors
Fuel pressure sensor
Frequency of operation
Continuous
Duration
0.5 seconds
MIL operation
1 driving cycle

TYPICAL ENABLING CONDITIONS


P0087:
Item
Specification
Specification
Minimum
Maximum
Engine speed
500 rpm
-
Battery voltage
8 V
-
Fuel volume
5 mm3
-
The monitor will not run if the fuel pressure sensor circuit (P0190, P0192 and P0193) is malfunctioning.

TYPICAL MALFUNCTION THRESHOLDS


P0087:
Detection Criteria
Threshold
Changing value of fuel pressure
Virtually no fluctuation

P0190:
Detection Criteria
Threshold
Fuel pressure sensor output voltage
Less than 0.55 V or more than 4.9 V

P0192:
Detection Criteria
Threshold
Fuel pressure sensor output voltage
Less than 0.55 V

P0193:
Detection Criteria
Threshold
Fuel pressure sensor output voltage
More than 4.9 V

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0087 Fuel Rail / System Pressure - Too Low


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
УКАЗАНИЕ:
  1. After completing repairs, check that P0087, P0190, P0192 and/or P0193 is not set again.
  2. If DTCs relating to different systems are output, and they share terminal E2 as their ground, check this ground circuit first.
1.READ VALUE OF FUEL PRESSURE SENSOR

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.

  1. Read the values.

    OK:
    The internal fuel pressure of the common rail is within the specification below.
    Engine Speed
    		Fuel Pressure
    Idling
    		Approximately 35 to 45 MPa
    3,000 rpm (No engine load)
    		Approximately 58 to 68 MPa


NG
Перейдите к шагу 3
OK


2.CHECK IF DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

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

  1. Clear the DTCs (see page RAV4_ACA30 RM000000PDK01FX.html).

  1. Let the engine idle for 60 seconds, and then repeat quick engine RPM accelerations (to 2,500 rpm) for 30 seconds.

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

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0087, P0190, P0192 or P0193
    		A
    No output
    		B


B
CHECK FOR INTERMITTENT PROBLEMS
A

REPLACE ECM

3.CHECK WIRE HARNESS (FUEL PRESSURE SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0087 Fuel Rail / System Pressure - Too Low

  1. Disconnect the B60 fuel pressure sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B60-5 (PR) - B32-67 (PCR1)
    		Below 1 Ω
    B60-2 (PR2) - B32-114 (PCR2)
    		Below 1 Ω
    B60-1 (VCS) - B32-68 (VCS)
    		Below 1 Ω
    B60-6 (VC) - B32-69 (VCM)
    		Below 1 Ω
    B60-4 (E2) - B32-91 (E2M)
    		Below 1 Ω
    B60-3 (E2S) - B32-66 (E2S)
    		Below 1 Ω
    B60-5 (PR) or B32-67 (PCR1) - Body ground
    		10 kΩ or higher
    B60-2 (PR2) or B32-114 (PCR2) - Body ground
    		10 kΩ or higher
    B60-1 (VCS) or B32-68 (VCS) - Body ground
    		10 kΩ or higher
    B60-6 (VC) or B32-69 (VCM) - Body ground
    		10 kΩ or higher
    B60-4 (E2) or B32-91 (E2M) - Body ground
    		10 kΩ or higher
    B60-3 (E2S) or B32-66 (E2S) - Body ground
    		10 kΩ or higher

  1. Reconnect the fuel pressure sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE COMMON RAIL ASSEMBLY