Toyota Corolla Cross: Fuel Pump Control (All Phase) Circuit Open (P12D013-P12D313)

DESCRIPTION

Refer to DTC P062712.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
P12D013	Fuel Pump Control (All Phase) Circuit Open	When the fuel pump control ECU operation duty ratio is 3 to 65%, an open is detected in the FPU, FPV and FPW circuit for 3 seconds or more (1 trip detection logic).	Open in fuel pump control ECU circuit Fuel pump control ECU Fuel pump (for low pressure side)	Except Mexico models: Comes on Mexico models: Does not come on	SAE Code: P12D0 DTC for Mexico Models: Applies
P12D113	Fuel Pump Control (U Phase) Circuit Open	When the fuel pump control ECU operation duty ratio is 3 to 65%, an open is detected in the FPU circuit for 3 seconds or more (1 trip detection logic).	Open in fuel pump control ECU circuit Fuel pump control ECU Fuel pump (for low pressure side)	Except Mexico models: Comes on Mexico models: Does not come on	SAE Code: P12D1 DTC for Mexico Models: Applies
P12D213	Fuel Pump Control (V Phase) Circuit Open	When the fuel pump control ECU operation duty ratio is 3 to 65%, an open is detected in the FPV circuit for 3 seconds or more (1 trip detection logic).	Open in fuel pump control ECU circuit Fuel pump control ECU Fuel pump (for low pressure side)	Except Mexico models: Comes on Mexico models: Does not come on	SAE Code: P12D2 DTC for Mexico Models: Applies
P12D313	Fuel Pump Control (W Phase) Circuit Open	When the fuel pump control ECU operation duty ratio is 3 to 65%, an open is detected in the FPW circuit for 3 seconds or more (1 trip detection logic).	Open in fuel pump control ECU circuit Fuel pump control ECU Fuel pump (for low pressure side)	Except Mexico models: Comes on Mexico models: Does not come on	SAE Code: P12D3 DTC for Mexico Models: Applies

Related Data List

DTC No.	Data List
P12D013 P12D113 P12D213 P12D313	Fuel Pump Control Duty Ratio

MONITOR DESCRIPTION

The fuel pump control ECU monitors the fuel pump drive circuit.

When a malfunction is detected in the fuel pump drive circuit, the diagnosis output circuit in the fuel pump control ECU modifies the operation signal sent by the ECM to indicate that there is a malfunction.

When the fuel pump control ECU operation duty ratio is 3 to 65% and the FPU, FPV or FPW terminal voltage is less than a certain value for 3 seconds or more, the diagnosis output circuit in the fuel pump control ECU modifies the operation signal sent by the ECM to indicate that there is a malfunction, and the ECM stores a DTC.

MONITOR STRATEGY

Related DTCs	P12D0: Fuel pump connector disconnected P12D1: Fuel pump U phase circuit open P12D2: Fuel pump V phase circuit open P12D3: Fuel pump W phase circuit open
Required Sensors/Components (Main)	Fuel pump control ECU
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	3 seconds
MIL Operation	2 driving cycles: except Mexico Models Immediate: for Mexico Models
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Output duty cycle	3 to 65%
Auxiliary battery voltage	10.5 V or higher
Ignition switch	ON

TYPICAL MALFUNCTION THRESHOLDS

P12D0: Fuel Pump Connector Disconnected

Fuel pump connector disconnected error from fuel pump control module

Received

P12D1: Fuel Pump U Phase Circuit Open

Fuel pump U phase circuit open error from fuel pump control module

Received

P12D2: Fuel Pump V Phase Circuit Open

Fuel pump V phase circuit open error from fuel pump control module

Received

P12D3: Fuel Pump W Phase Circuit Open

Fuel pump W phase circuit open error from fuel pump control module

Received

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

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9. Start the engine and wait 10 seconds or more [A].
10. Turn the GTS on.
11. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
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: P12D013, P12D113, P12D213 or P12D313.
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 is malfunctioning.
    • If the judgment result is INCOMPLETE, run the engine at an engine speed of 2000 rpm or more for 10 seconds or more and check the DTC judgment result 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

Refer to DTC P062712.

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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.

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.

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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 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.

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PROCEDURE

1.	PERFORM ACTIVE TEST USING GTS (FUEL PUMP SINGLE PHASE ENERGIZATION)

*1

Fuel Pump Control ECU

-

-

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the O67 fuel pump control ECU connector.

(b) Enter the following menus.

Powertrain > Engine > Active Test

Tester Display
Fuel Pump Single Phase Energization

(c) Operate the fuel pump control ECU using the Active Test function and measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	GTS Operation	Specified Condition
O67-2 (FPU) - Body ground	U Phase	4.4 to 8.4 V*
O67-3 (FPV) - Body ground	V Phase	4.4 to 8.4 V*
O67-4 (FPW) - Body ground	W Phase	4.4 to 8.4 V*

HINT:

• *: This Active Test limits the fuel pump control ECU output duty cycle to 50%. Therefore, the output voltage of the fuel pump control ECU will be approximately 50% of the power source voltage (+B terminal).
• Before performing this inspection, check that the auxiliary battery voltage is between 11 and 14 V (not depleted).

NG

REPLACE FUEL PUMP CONTROL ECU

OK

2.	CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - FUEL PUMP (FOR LOW PRESSURE SIDE))

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the fuel pump control ECU connector.

(b) Disconnect the fuel pump (for low pressure side) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
O67-2 (FPU) - O220-3 (BLPU)	Always	Below 1 Ω
O67-3 (FPV) - O220-4 (BLPV)	Always	Below 1 Ω
O67-4 (FPW) - O220-2 (BLPW)	Always	Below 1 Ω

HINT:

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

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OK

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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