Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000255X8
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P2C9000; Crankcase Ventilation System - Hose "A" Disconnected; 2023 - 2025 MY GR Corolla [09/2022 -        ]

DTC

P2C9000

Crankcase Ventilation System - Hose "A" Disconnected

DESCRIPTION

When blowby gas is introduced from the crankcase to the intake system, fresh air is introduced to maintain pressure inside the crankcase.

In order to prevent leaks from the fresh air hose during boosting, the intake air flow and PCV pressure are monitored to detect hose detachment or damage.

*1

Air Cleaner

*2

Compressor

*3

Intercooler

*4

Throttle Valve

*5

PCV Valve

*6

Vacuum Sensor Assembly

*a

Blowby Gas

*b

Fresh Air

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P2C9000

Crankcase Ventilation System - Hose "A" Disconnected

The change in PCV pressure is less than the threshold value when the change in intake air flow for each bank is at or above the specified value (2 tripdetection logic).
  • PCV hose (air inlet duct - cylinder head cover)
  • Air hose (vacuum sensor assembly - cylinder head cover)
  • Air inlet duct (bank 1)
  • Cylinder head cover (bank 1)

Comes on

SAE Code: P2C90

MONITOR DESCRIPTION

If the change in PCV pressure does not exceed the threshold value in response to an increase in the intake air flow for each bank, it is determined that the hose is detached or damaged and a DTC is stored.

MONITOR STRATEGY

Related DTCs

P2C90: PCV fresh air hose monitor (bank 1)

P2C91: PCV fresh air hose monitor (bank 2)

Required Sensors/Components (Main)

Vacuum sensor assembly

Required Sensors/Components (Related)

Mass air flow meter sub-assembly

Engine coolant temperature sensor

Frequency of Operation

Once per driving cycle

Duration

Within 3 seconds

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Atmospheric pressure

76 kPa(abs) [11 psi(abs)] or higher

Estimated ambient temperature

-10°C (14°F) or higher

Engine coolant temperature

75°C (14°F) or higher

Engine speed

Less than 3800 rpm

Mass air flow meter fail (P0102, P0103, P010F)

Not detected

Intake air temperature sensor (mass air flow meter sub-assembly) fail (P0112, P0113)

Not detected

Engine coolant temperature sensor fail (P0117, P0118)

Not detected

Vacuum sensor assembly fail (P051C, P051D)

Not detected

Canister pressure sensor - vacuum sensor assembly correlation fail (P109E)

Not detected

All of the following conditions (a), (b) and (c) are met

10 times or more

(a) Single calculation term for PCV pressure integral

0.4 seconds or more

(b) Intake air amount for each bank

45 gm/sec or higher

(C) Delta intake air amount for each bank

6 gm/sec or higher

TYPICAL MALFUNCTION THRESHOLDS

Cumulative value of PCV pressure integral

Below 5 kPa(abs) [0.73 psi(abs)]

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON [A].
  7. Turn the GTS on.
  8. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].

    HINT:

    The A/C switch and all accessory switches should be off.

  9. Accelerate the vehicle to 60 km/h (37 mph) for 5 seconds or less [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  10. Repeat step [C] above at least 2 times in one driving cycle.
  11. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
  12. 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.
  13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  14. Input the DTC: P2C9000.
  15. 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.
    • If the judgment result is INCOMPLETE, perform steps [C] through [D] again.
    • [B] to [D]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

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.
  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

    DTC

    Suspected Area

    P2C9000

    Bank 1

    P2C9100

    Bank 2

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2C9000 AND/OR P2C9100)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

P2C9000 and/or P2C9100 and other DTCs are output

A

P2C9000 and/or P2C9100 is output

B

NOTICE:

If the Freeze Frame Data "Initial Engine Coolant Temperature" is 0°C (0°F) or less, the hose may be temporarily clogged due to freezing

HINT:

If any DTCs other than P2C9000 and/or P2C9100 are output, troubleshoot those DTCs first.

A

GO TO DTC CHART
B

2.

CHECK PCV FRESH AIR LINE (CYLINDER HEAD COVER - AIR INLE DUCT, VACUUM SENSOR ASSEMBLY)

(a) Check the PCV hose connections.

OK:

PCV hose is connected correctly.

NG

SECURELY RECONNECTION PCV HOSE
OK

3.

CHECK PCV FRESH AIR LINE (CYLINDER HEAD COVER - AIR INLE DUCT)

(a) Check the PCV hose clogged and damaged.

OK:

PCV hose is not clogged and damaged.

NG

CLEAN OR REPLACE PCV HOSE
OK

4.

CHECK PCV FRESH AIR LINE (VACUUM SENSOR ASSEMBLY - CYLINDER HEAD COVER)

(a) Check the PCV hose clogged and damaged.

OK:

PCV hose is not clogged and damaged.

NG

CLEAN OR REPLACE PCV HOSE
OK

5.

INSPECT AIR INLET DUCT

(a) Inspect the air inlet duct.

OK:

PCV fresh air port of the air inlet duct is not clogged and damaged.

NG

CLEAN OR REPLACE AIR INLET DUCT
OK

6.

INSPECT CYLINDER HEAD COVER

(a) Inspect the cylinder head cover.

OK:

PCV fresh air port and PCV pressure sensor port of the cylinder head cover is not clogged and damaged.

OK

REPLACE ECM 2023 MY GR Corolla [09/2022 - 11/2022]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY GR Corolla [11/2022 -        ]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL

NG

CLEAN OR REPLACE CYLINDER HEAD COVER