Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026JRX
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P14CE12,P14CE14,P241812,P241814; EVAP System Switching Valve Control Circuit "B" High Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

P14CE12

EVAP System Switching Valve Control Circuit "B" High Circuit Short to Battery

DTC

P14CE14

EVAP System Switching Valve Control Circuit "B" Low Circuit Short to Ground or Open

DTC

P241812

EVAP System Switching Valve Control Circuit High Circuit Short to Battery

DTC

P241814

EVAP System Switching Valve Control Circuit Low Circuit Short to Ground or Open

DESCRIPTION

Refer to EVAP (Evaporative Emission) System.

Click here 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: EVAP System+ 2023 MY Corolla Corolla Hatchback [11/2022 - 03/2023]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: EVAP System+ 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: EVAP System+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P14CE12

EVAP System Switching Valve Control Circuit "B" High Circuit Short to Battery

Short in CCV B circuit for 0.5 seconds or more (1 trip detection logic).

  • Short in fuel vapor-containment valve circuit
  • Fuel vapor-containment valve
  • ECM

Comes on

DTC stored

  • SAE Code: P14D1
  • DTC for Mexico Models: Does not apply

P14CE14

EVAP System Switching Valve Control Circuit "B" Low Circuit Short to Ground or Open

Open or short in CCV B circuit for 0.5 seconds or more (1 trip detection logic).

  • Open or short in fuel vapor-containment valve circuit
  • Fuel vapor-containment valve
  • ECM

Comes on

DTC stored

  • SAE Code: P14D0
  • DTC for Mexico Models: Does not apply

P241812

EVAP System Switching Valve Control Circuit High Circuit Short to Battery

Short in CCV A circuit for 0.5 seconds or more (1 trip detection logic).

  • Short in fuel vapor-containment valve circuit
  • Fuel vapor-containment valve
  • ECM

Comes on

DTC stored

  • SAE Code: P2420
  • DTC for Mexico Models: Does not apply

P241814

EVAP System Switching Valve Control Circuit Low Circuit Short to Ground or Open

Open or short in CCV A circuit for 0.5 seconds or more (1 trip detection logic).

  • Open or short in fuel vapor-containment valve circuit
  • Fuel vapor-containment valve
  • ECM

Comes on

DTC stored

  • SAE Code: P2419
  • DTC for Mexico Models: Does not apply

DTC No.

Monitoring Item

Detection Timing

Detection Logic

SAE Code

P14CE12

CCV B circuit range check (high current)

Always

1 trip

P14D1

P14CE14

CCV B circuit range check (low voltage)

P14D0

P241812

CCV A circuit range check (high current)

P2420

P241814

CCV A circuit range check (low voltage)

P2419

MONITOR DESCRIPTION

These DTCs are stored if an open or short in the fuel vapor-containment valve circuit is detected.

Example:

  • If the CCA+, CCA-, CCB+ or CCB- operation signal is off, but the step motor output signal is on, the ECM determines that there is a short in the fuel vapor-containment valve circuit, and stores a DTC P14CE12 or P241812.
  • If the CCA+, CCA-, CCB+ or CCB- operation signal is on, and the step motor output signal is off, the ECM determines that there is an open or short in the fuel vapor-containment valve circuit, and stores a DTC P14CE14 or P241814.

MONITOR STRATEGY

Required Sensors/Components (Main)

Fuel vapor-containment valve

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

Auxiliary battery voltage

10 V or higher

TYPICAL MALFUNCTION THRESHOLDS

P14D0

Both of the following conditions are met

-

Command to motor phase B

OFF

Either of the following conditions is met

A or B

A. Motor phase B positive terminal voltage level

Low

B. Motor phase B negative terminal voltage level

Low

P14D1

Either of the following conditions is met

A or B

A. Motor phase B positive terminal current detected by motor driver IC

2.5 A or more

B. Motor phase B negative terminal current detected by motor driver IC

2.5 A or more

P2419

Both of the following conditions are met

-

Command to motor phase A

OFF

Either of the following conditions is met

A or B

A. Motor phase A positive terminal voltage level

Low

B. Motor phase A negative terminal voltage level

Low

P2420

Either of the following conditions is met

A or B

A. Motor phase A positive terminal current detected by motor driver IC

2.5 A or more

B. Motor phase A negative terminal current detected by motor driver IC

2.5 A or more

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 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (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.
  7. Turn the GTS on.
  8. Wait 5 seconds or more [A].
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  10. 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.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P14CE12, P14CE14, P241812 or P241814.
  13. 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 is malfunctioning.
    • If the judgment result is INCOMPLETE, perform the steps [A] through [B] again.
    • [A] to [B]: 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 auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU 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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): VEHICLE CONTROL HISTORY (RoB)

    (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, 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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): VEHICLE CONTROL HISTORY (RoB)

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.
  • If the cable is disconnected from the Auxiliary Battery terminal, the fuel vapor containment valve cannot close completely and an EVAP SYSTEM DTC will be stored. If the DTC is output, drive the vehicle at a speed of 10 km/h (6 mph) or more and then leave the vehicle for 30 seconds or more. Then perform the Evaporative System Check again.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTC after recording the Freeze Frame Data and DTC.

Powertrain > Engine > Clear DTCs

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

NEXT

2.

READ OUTPUT DTC (IN ADDITION TO DTC P14CE12, P14CE14, P241812 OR P241814)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P14CE12, P14CE14, P241812 or P241814 is output

A

DTCs are not output

B

B

CHECK FOR INTERMITTENT PROBLEMS

A

3.

CHECK HARNESS AND CONNECTOR

(a) Disconnect the ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A46-7 (CCA+) - A46-8 (CCA-)

20°C (68°F)

29 to 33 Ω

A46-20 (CCB+) - A46-21 (CCB-)

20°C (68°F)

29 to 33 Ω

A46-7 (CCA+) or A46-8 (CCA-) - Body ground and other terminals

Always

10 kΩ or higher

A46-20 (CCB+) or A46-21 (CCB-) - Body ground and other terminals

Always

10 kΩ or higher

HINT:

The standard values shown are fuel vapor-containment valve resistance values.

OK

REPLACE ECM 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL

NG

4.

INSPECT FUEL VAPOR CONTAINMENT VALVE

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (EMISSION CONTROL): FUEL VAPOR CONTAINMENT VALVE (w/ Canister Pump Module): INSPECTION

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL VAPOR-CONTAINMENT VALVE - ECM)

NG

REPLACE FUEL VAPOR CONTAINMENT VALVE