Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Fuel Rail / System Pressure - Too High (P008800)

DESCRIPTION

Refer to DTC P008700.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P008800

Fuel Rail / System Pressure - Too High

Although the ECM is requesting the fuel pump assembly (for high pressure side) to open the spill control valve, fuel pressure increases 3 MPa (30.6 kgf/cm2, 435 psi) from target pressure for about 10 seconds (1 trip detection logic).

  • Fuel pump assembly (for high pressure side)
  • Fuel pressure sensor (for high pressure side)
  • ECM

Comes on

  • SAE Code: P0088
  • DTC for Mexico Models: Applies

MONITOR DESCRIPTION

If the fuel pressure (for high pressure side) increases despite a decrease request signal being sent to the fuel pump assembly (for high pressure side) by the ECM, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P0088: Fuel pressure too high

Required Sensors/Components (Main)

Fuel pressure sensor (for high pressure side)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

About 10 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Fuel pressure sensor (for high pressure side) malfunction (P0192, P0193)

Not detected

High pressure fuel pump malfunction (P1235)

Not detected

Fuel injector driver malfunction (P0201, P0202, P0203, P0204, P062D)

Not detected

Time after engine start

0.2 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

Duration that both of the following conditions (a) and (b) are met

10 seconds or more

(a) Difference in fuel pressure between actual and target

3 MPa (30.6 kgf/cm2, 435 psi) or higher

(b) Actual discharge rate of high pressure fuel pump

0 mm3/st or less

CONFIRMATION DRIVING PATTERN

HINT:

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  • Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Record the Freeze Frame Data.
  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  6. Turn the ignition switch off and wait for at least 30 seconds.
  7. Turn the ignition switch to ON.
  8. Turn the GTS on.
  9. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  10. Start the engine.
  11. Based on the engine speed, engine load, injection mode and other conditions displayed in the Freeze Frame Data, reproduce the conditions present when the DTC was stored.
  12. Enter the following menus: Powertrain / Engine / Trouble Codes.
  13. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  15. Input the DTC: P008800.
  16. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P008800)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P008800 is output

A

DTC P008800 and other DTCs are output

B

HINT:

If any DTCs other than P008800 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

INSPECT FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)

(a) Put the engine in Inspection Mode (Maintenance Mode).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(b) Start the engine.

(c) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Fuel Pressure (High)

(d) According to the display on the GTS, read the Data List while racing the engine.

OK:

Fuel pressure fluctuates.

HINT:

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).

Click here

NG

REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)

OK

3.

REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)

Click here

HINT:

Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).

Click here

NEXT

4.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(b) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

5.

CHECK IF DTC OUTPUT RECURS (SEE IF DTC P008800 IS OUTPUT AGAIN)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P008800 is output

B

A

END

B

REPLACE ECM

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