Dtc P0088 Fuel Rail / System Pressure - Too High

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

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0088 AND/OR P1229)

INSPECT SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)

CHECK IF DTC OUTPUT RECURS

CHECK WIRE HARNESS (SCV - ECM)

REPLACE COMMON RAIL ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS

DTC P0088 Fuel Rail / System Pressure - Too High

DTC P1229 Fuel Pump System


DESCRIPTION


DTC No.
DTC Detection Condition
Trouble Area
P0088
Internal fuel pressure of common rail is too high:
Fuel pressure exceeds 200 MPa (2,039 kgf/cm2, 29,007 psi)
(1 trip detection logic)
  1. Supply pump (suction control valve)
  2. Common rail assembly (pressure discharge valve)
  3. Short in supply pump (suction control valve) circuit
  4. ECM
P1229
Fuel over-feed:
Internal fuel pressure continues exceeding target fuel pressure despite ECM closing suction control valve
(1 trip detection logic)
  1. Short in supply pump (suction control valve) circuit
  2. Supply pump (suction control valve)
  3. ECM

УКАЗАНИЕ:
  1. DTC P0088 and P1229 can be detected if the vehicle is driven at 50 km/h (31 mph) for 5 minutes.
  2. For more information on the supply pump (suction control valve) and common rail system, refer to the system description (see page RAV4_ACA30 RM000000XSN008X.html).
  3. When DTC P0088 and/or P1229 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 35 to 40 MPa
3,000 rpm (No engine load)
Approximately 78 to 88 MPa

MONITOR DESCRIPTION

  1. P0088 (Internal fuel pressure too high):
    The ECM sets this DTC if the fuel pressure inside the common rail is more than 200 MPa (2,039 kgf/cm2, 29,007 psi). This DTC indicates that: 1) the suction control valve may be stuck open or 2) there may be a short in the suction control valve circuit.
    If this DTC is set, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned off.
  1. P1229 (Fuel over-feed):
    The ECM sets this DTC if the actual fuel pressure inside the common rail remains higher than the target fuel pressure, despite the ECM closing the suction control valve. This DTC indicates that the suction control valve may be stuck open, or there may be a short in its circuit. Under this condition, the pressure discharge valve operates frequently.
    If this DTC is 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


P0088:
Required sensor
Fuel pressure sensor
Frequency of operation
Continuous
Duration
1 second
MIL operation
1 driving cycle

P1229:
Required sensor
Fuel pressure sensor
Frequency of operation
Continuous
Duration
10 minutes
MIL operation
1 driving cycle

TYPICAL ENABLING CONDITIONS


P0088:
Specification
The monitor will not run if the fuel pressure sensor or suction control valve circuit is malfunctioning.

P1229:
Item
Specification
Target fuel pressure variation
Small
The monitor will not run if the fuel pressure sensor or suction control valve circuit is malfunctioning.

TYPICAL MALFUNCTION THRESHOLDS


P0088:
Detection Criteria
Threshold
Fuel pressure sensor
200 MPa (2,039 kgf/cm2, 29,007 psi) or more

P1229:
Detection Criteria
Threshold
The internal fuel pressure of the common rail when the suction control valve is closed.
Remains higher than target fuel pressure

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0088 Fuel Rail / System Pressure - Too High


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
  1. After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ400AX.html) and initialization (see page RAV4_ACA30 RM000000TIN009X.html).
  2. After replacing a supply pump, the ECM needs initialization (see page RAV4_ACA30 RM000000TIN009X.html).
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0088 AND/OR P1229)

  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.

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0088 and/or P1229
    		A
    P0190, P0192 and/or P0193
    		B


B
GO TO DTC CHART
A


2.INSPECT SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0088 Fuel Rail / System Pressure - Too High

  1. Disconnect the B46 suction control valve connector.

  1. Measure the resistance of the suction control valve.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B46-1 - B46-2
    		20°C (68°F)
    		1.9 to 2.3 Ω

  1. Reconnect the suction control valve connector.



NG
REPLACE SUPPLY PUMP ASSEMBLY
OK


3.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. Clear DTCs (see page RAV4_ACA30 RM000000PDK01GX.html).

  1. Disconnect the suction control valve connector and then start the engine. Wait for 1 minute.

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

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    No output or engine does not start
    		A
    P1229
    		B

  1. Reconnect the suction control valve connector.



B
REPLACE SUPPLY PUMP ASSEMBLY
A


4.CHECK WIRE HARNESS (SCV - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Ftv.Система Ecd. Dtc P0088 Fuel Rail / System Pressure - Too High

  1. Disconnect the B46 valve connector.

  1. Disconnect the B32 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    B46-1 - B32-42 (PCV+)
    		Below 1 Ω
    B46-2 - B32-41 (PCV-)
    		Below 1 Ω
    B46-1 or B32-42 (PCV+) - Body ground
    		10 kΩ or higher
    B46-2 or B32-41 (PCV-) - Body ground
    		10 kΩ or higher

  1. Reconnect the suction control valve connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.REPLACE COMMON RAIL ASSEMBLY

  1. Replace the common rail assembly.


NEXT


6.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

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

  1. Clear DTCs (see page RAV4_ACA30 RM000000PDK01GX.html).

  1. Start the engine and drive the vehicle for approximately 15 minutes.

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

  1. Read the DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P0088 and/or P1229
    		A
    No output
    		B


B
SYSTEM IS OK
A

REPLACE ECM