Toyota Avalon (XX50): Fuel Pump "A" Control Circuit Short to Battery (P062712). Fuel Pump "A" Control Circuit Short to Ground or Open (P062714). VIN Not Programmed (P063051)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Fuel Pump "A" Control Circuit Short to Battery (P062712). Fuel Pump "A" Control Circuit Short to Ground or Open (P062714). VIN Not Programmed (P063051)

Fuel Pump "A" Control Circuit Short to Battery (P062712)

DESCRIPTION

The fuel pump control ECU performs PWM (Pulse Width Modulation) control to control the fuel pump (for low pressure side) speed steplessly over a wide range.

The fuel pump control ECU controls the speed of the fuel pump (for low pressure side) by switching the current of FPU, FPV and FPW based on operation signals output from the ECM.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P062712	Fuel Pump "A" Control Circuit Short to Battery	When the fuel pump control ECU operation duty ratio is 3 to 65%, the FPC terminal voltage is at a certain value or more for 3 seconds or more (1 trip detection logic).	Short in fuel pump control ECU circuit Fuel pump control ECU ECM	Comes on	DTC stored	SAE Code: P0629

Related Data List

DTC No.	Data List
P062712	Fuel Pump Control Duty Ratio

MONITOR DESCRIPTION

The ECM monitors the fuel pump control ECU operation signals.

When the output duty ratio of the operation signal from the ECM is 3 to 65% and the FPC terminal voltage is a certain value or more for 3 seconds or more, the ECM stores a DTC.

MONITOR STRATEGY

Related DTCs	P0629: Fuel pump control circuit range check (high voltage)
Required Sensors/Components (Main)	Fuel pump control ECU
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	3 seconds
MIL Operation	Immediate
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
Power switch	On (IG)

TYPICAL MALFUNCTION THRESHOLDS

Fuel pump control module terminal voltage level

High for 0.3 seconds 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
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and wait 10 seconds or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P062712.

Check the DTC judgment result.

Techstream 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 2500 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

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.)

Click here
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 Techstream. 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.	INSPECT ECM (CHECK FOR SHORT)

*a	Front view of wire harness connector (to Fuel Pump Control ECU)

(a) Disconnect the fuel pump control ECU connector.

(b) Turn the power switch on (IG).

Standard Voltage:

Tester Connection	Condition	Specified Condition
K15-2 (FPC) - Body ground	Power switch on (IG)	Below 1 V

REPLACE FUEL PUMP CONTROL ECU

2.	CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)

(a) Disconnect the fuel pump control ECU connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K15-2 (FPC) or A19-6 (FPC) - Other terminals	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

Fuel Pump "A" Control Circuit Short to Ground or Open (P062714)

DESCRIPTION

Refer to DTC P062712.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P062714	Fuel Pump "A" Control Circuit Short to Ground or Open	When the fuel pump control ECU operation duty ratio is 3 to 65%, the FPC terminal voltage is a certain value or less for 3 seconds or more (1 trip detection logic).	Open or short in fuel pump control ECU circuit Fuel pump control ECU EFI-MAIN NO. 2 relay ECM	Comes on	DTC stored	SAE Code: P0628

Related Data List

DTC No.	Data List
P062714	Fuel Pump Control Duty Ratio

MONITOR DESCRIPTION

The ECM monitors the fuel pump control ECU operation signals.

When the output duty ratio of the operation signal from the ECM is 3 to 65% and the FPC terminal voltage is a certain value or less for 3 seconds or more, the ECM stores a DTC.

MONITOR STRATEGY

Related DTCs	P0628: Fuel pump control circuit range check (low voltage)
Required Sensors/Components (Main)	Fuel pump control ECU
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	3 seconds
MIL Operation	Immediate
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
Power switch	On (IG)

TYPICAL MALFUNCTION THRESHOLDS

Fuel pump control module terminal voltage level

Low for 1.163264 seconds 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
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and wait 10 seconds or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P062714.

Check the DTC judgment result.

Techstream 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 2500 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.

Click here

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
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.)

Click here
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:

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (POWER SOURCE OF FUEL PUMP CONTROL ECU)

*a	Front view of wire harness connector (to Fuel Pump Control ECU)

(a) Disconnect the fuel pump control ECU connector.

(b) Turn the power switch on (IG).

Standard Voltage:

Tester Connection	Condition	Specified Condition
K15-1 (+B) - K15-3 (GND)	Power switch on (IG)	11 to 14 V

GO TO STEP 4

2.	INSPECT ECM (FPC TERMINAL)

*a	Front view of wire harness connector (to Fuel Pump Control ECU)

(a) Disconnect the fuel pump control ECU connector.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Fuel Pump Single Phase Energization.

Powertrain > Engine > Active Test

Tester Display
Fuel Pump Single Phase Energization

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

Standard Resistance:

Tester Connection	Techstream Operation	Specified Condition
K15-2 (FPC) - Body ground	Before Active Test → During Active Test	Before Active Test: Resistance is stable → During Active Test: Resistance fluctuates*

HINT:

*: Using the Active Test, duty control of the transistors in the ECM will be performed. Due to the duty control, resistance of the FPC terminal will be unstable during the Active Test. If the resistance is stable before the Active Test and fluctuates while performing the Active Test, it can be determined that the transistor is operating. If the transistor does not operate during the Active Test, the ECM may be malfunctioning.

REPLACE FUEL PUMP CONTROL ECU

3.	CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)

(a) Disconnect the fuel pump control ECU connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K15-2 (FPC) - A19-6 (FPC)	Always	Below 1 Ω
K15-2 (FPC) or A19-6 (FPC) - Body ground	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - BODY GROUND)

(a) Disconnect the fuel pump control ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K15-3 (GND) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT EFI-MAIN NO. 2 RELAY

(a) Inspect the EFI-MAIN NO. 2 relay.

Click here

REPLACE EFI-MAIN NO. 2 RELAY

6.	CHECK TERMINAL VOLTAGE (POWER SOURCE OF EFI-MAIN NO. 2 RELAY)

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	EFI-MAIN NO. 2 Relay

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
3 (EFI-MAIN NO. 2 relay) - Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - EFI-MAIN NO. 2 RELAY)

7.	CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - BODY GROUND)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (EFI-MAIN NO. 2 relay) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - EFI-MAIN NO. 2 RELAY)

(a) Disconnect the fuel pump control ECU connector.

(b) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K15-1 (+B) - 5 (EFI-MAIN NO. 2 relay)	Always	Below 1 Ω
K15-1 (+B) or 5 (EFI-MAIN NO. 2 relay) - Body ground and other terminals	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 2 RELAY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

VIN Not Programmed (P063051)

MONITOR DESCRIPTION

DTC P063051 is stored when the Vehicle Identification Number (VIN) is not stored in the ECM or the stored VIN is not accurate.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P063051

VIN Not Programmed

Either of the following conditions is met (1 trip detection logic):

The VIN is not stored in the ECM.
The VIN written to the ECM is not accurate.

Comes on

DTC stored

SAE Code: P0630

MONITOR STRATEGY

Related DTCs	P0630: VIN not programmed
Required Sensors/Components (Main)	ECM
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	-
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Reading VIN	No error
Auxiliary battery voltage	8 V or higher
Power switch	On (IG)

TYPICAL MALFUNCTION THRESHOLDS

VIN	Not programmed

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

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the Techstream on.
Wait 5 seconds or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P063051.

Check the DTC judgment result.

Techstream 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.
[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.

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.)

Click here
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:

PROCEDURE

1.	CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P063051)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

NOTICE:

If P063051 is output, the VIN must be written to the ECM using the Techstream. However, all DTCs are cleared automatically by the Techstream when the VIN is written. If DTCs other than P063051 are output, troubleshoot them first.

Result	Proceed to
DTC P063051 is output	A
DTC P063051 and other DTCs are output	B

GO TO DTC CHART

WRITE VIN

(a) Write the VIN.

Click here

END

Internal Control Module Random Access Memory (RAM) Error Data Memory Failure (P060444). Control Module Processor Watchdog/Safety MCU Failure (P060647). Control Module Performance Bank 1 Watchdog/Safet

Actuator Supply Voltage "A" Circuit Short to Ground or Open (P065714). High Pressure Fuel Pump Circuit Open (P123513). "A" Camshaft Position Actuator Bank 1 General Electrical Failure (P136001)

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground (P1C9F11,P1C9F15). Engine Failed to Start Mechanical Linkage Failure (P1C7779). High Voltage Power Resource Circuit Consump
Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground (P1C9F11,P1C9F15) DESCRIPTION Refer to the description for DTC P0ABF11. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P1C9F11 Hybrid/EV Battery Current Sensor for Driving Contro ...