P0087 P0190 P0192 P0193

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.


ECD SYSTEM 2AD-FHV P0087 P0190 P0192 P0193 TOYOTA RAV4 / ACA30, 33, 38 ALA30


 

DTC No.DTC Detection ConditionTrouble Area
P0087Fuel 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
P0190Fuel 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
P0192Fuel 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
P0193Fuel 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

HINT:

  1. For more information on the fuel pressure sensor and common rail system, refer to the system description.
  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 SpeedFuel Pressure
IdlingApproximately 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.

    ECD SYSTEM 2AD-FHV P0087 P0190 P0192 P0193 TOYOTA RAV4 / ACA30, 33, 38 ALA30
  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 SensorsFuel pressure sensor
Frequency of operationContinuous
Duration1 second
MIL operation1 driving cycle

 

P0190: 
Required SensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 seconds
MIL operation1 driving cycle

 

P0192: 
Required SensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 seconds
MIL operation1 driving cycle

 

P0193: 
Required SensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 seconds
MIL operation1 driving cycle


 

TYPICAL ENABLING CONDITIONS

 

P0087: 
ItemSpecificationSpecification
MinimumMaximum
Engine speed500 rpm-
Battery voltage8 V-
Fuel volume5 mm3-
The monitor will not run if the fuel pressure sensor circuit (P0190, P0192 and P0193) is malfunctioning.


 

TYPICAL MALFUNCTION THRESHOLDS

 

P0087: 
Detection CriteriaThreshold
Changing value of fuel pressureVirtually no fluctuation

 

P0190: 
Detection CriteriaThreshold
Fuel pressure sensor output voltageLess than 0.55 V or more than 4.9 V

 

P0192: 
Detection CriteriaThreshold
Fuel pressure sensor output voltageLess than 0.55 V

 

P0193: 
Detection CriteriaThreshold
Fuel pressure sensor output voltageMore than 4.9 V


 

WIRING DIAGRAM


ECD SYSTEM 2AD-FHV P0087 P0190 P0192 P0193 TOYOTA RAV4 / ACA30, 33, 38 ALA30



 

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration and initialization.

HINT:

  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 SpeedFuel Pressure
    IdlingApproximately 35 to 45 MPa
    3,000 rpm (No engine load)Approximately 58 to 68 MPa

     

 

 NG
GO TO STEP 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.

  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 P0193A
    No outputB
 B
CHECK FOR INTERMITTENT PROBLEMS
 
A 
 
REPLACE ECM 

 

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


 

ECD SYSTEM 2AD-FHV P0087 P0190 P0192 P0193 TOYOTA RAV4 / ACA30, 33, 38 ALA30
  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 ConnectionSpecified 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 ground10 kΩ or higher
    B60-2 (PR2) or B32-114 (PCR2) - Body ground10 kΩ or higher
    B60-1 (VCS) or B32-68 (VCS) - Body ground10 kΩ or higher
    B60-6 (VC) or B32-69 (VCM) - Body ground10 kΩ or higher
    B60-4 (E2) or B32-91 (E2M) - Body ground10 kΩ or higher
    B60-3 (E2S) or B32-66 (E2S) - Body ground10 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