Toyota Corolla Cross: EVAP System Switching Valve Control Circuit "B" High Circuit Short to Battery (P14CE12,P14CE14,P241812,P241814)

DESCRIPTION

Refer to EVAP (Evaporative Emission) System.

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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

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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.

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

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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.

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  (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.

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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

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

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

NEXT

(a) Read the DTCs.

B

CHECK FOR INTERMITTENT PROBLEMS

A

(a) Disconnect the ECM connector.

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

Standard Resistance:

HINT:

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

OK

REPLACE ECM

NG

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OK

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

NG

REPLACE FUEL VAPOR CONTAINMENT VALVE

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