Toyota Avalon (XX50): VIN Not Programmed (P063051). Actuator Supply Voltage "A" Circuit Short to Ground or Open (P065714). Brake Switch "B" Circuit Short to Battery (P070312)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / VIN Not Programmed (P063051). Actuator Supply Voltage "A" Circuit Short to Ground or Open (P065714). Brake Switch "B" Circuit Short to Battery (P070312)

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.	VIN ECM	Comes on	DTC stored	SAE Code: P0630

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
Battery voltage	8 V or higher
Engine switch	On (IG)
Starter	Off

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine 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 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 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.	CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P063051)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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

Actuator Supply Voltage "A" Circuit Short to Ground or Open (P065714)

DESCRIPTION

The electronic throttle control system has a dedicated power supply circuit. The voltage (+BM) is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the electronic throttle control system and cuts off the current to the throttle actuator.

When the voltage becomes unstable, the electronic throttle control system itself becomes unstable. For this reason, when the voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to normal, turn the engine switch off. If a malfunction is not detected the ECM allows current to flow to the throttle actuator so that it can operate.

HINT:

The electronic throttle control system does not use a throttle cable.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P065714	Actuator Supply Voltage "A" Circuit Short to Ground or Open	An open or short is detected in the electronic throttle control system power source (+BM) circuit (1 trip detection logic).	Open or short in electronic throttle control system power source circuit Battery Battery terminals ETCS fuse ECM	Comes on	DTC stored	SAE Code: P0658

MONITOR DESCRIPTION

The ECM monitors the battery supply voltage applied to the throttle actuator.

When the power supply voltage (+BM) is less than 4 V for 0.8 seconds or more, the ECM interprets this as an open or ground in the power supply circuit, then illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	P0658: Electronic throttle actuator power supply voltage circuit range check (low voltage)
Required Sensors/Components (Main)	Throttle actuator Throttle valve (throttle body with motor assembly) ETCS fuse
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	0.8 seconds
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
Both of the following conditions are met	-
Command to electronic throttle actuator power	On
Battery voltage	8 V or higher

TYPICAL MALFUNCTION THRESHOLDS

Throttle actuator power supply voltage (+BM)

Less than 4 V

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 engine switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) [A].
Turn the Techstream on.
Start the engine.
Slowly depress the accelerator pedal, raise the engine speed to approximately 3000 rpm over approximately 5 seconds, and then idle the engine [B].
Check that 16 seconds or more have elapsed since the engine was started.
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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: P065714.

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 shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
[A] to [C]: 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.

FAIL-SAFE

When any of these DTCs or other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 7° throttle valve opening angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to be driven at a low speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the engine switch is then turned off.

WIRING DIAGRAM

Refer to DTC P210014.

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

PROCEDURE

1.	READ VALUE USING TECHSTREAM (+BM VOLTAGE)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Engine / Data List / +BM Voltage.

Powertrain > Engine > Data List

Tester Display
+BM Voltage

(e) According to the display on the Techstream, read the Data List.

Standard Voltage:

11 to 14 V

CHECK FOR INTERMITTENT PROBLEMS

2.	CHECK HARNESS AND CONNECTOR (BATTERY - ECM, BODY GROUND)

(a) Disconnect the ECM connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A18-8 (+BM) - Body ground	Always	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
C56-49 (ME01) - Body ground	Always	Below 1 Ω
C56-53 (E1) - Body ground	Always	Below 1 Ω

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

Brake Switch "B" Circuit Short to Battery (P070312)

DESCRIPTION

The stop light switch assembly is part of a duplex system that transmits two signals: STP and ST1-. These two signals are used by the ECM to monitor whether or not the brake system is working properly. This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly. The ECM store this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P070312	Brake Switch "B" Circuit Short to Battery	The stop light switch assembly remains on even when the vehicle repeats 5 cycles of STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) (2 trip detection logic).	Short in stop light switch assembly circuit Stop light switch assembly ECM	Does not come on	DTC stored	SAE Code: P0724

MONITOR DESCRIPTION

This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly, stores this DTC. The vehicle must STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) 5 times during 2 driving cycles, in order to detect a malfunction.

MONITOR STRATEGY

Required Sensors/Components (Main)	Stop light switch assembly
Required Sensors/Components (Related)	Speed sensor
Frequency of Operation	Continuous

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.
Wait 5 seconds [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: P070312.

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 has a malfunction.
If the judgment result is INCOMPLETE, perform steps [C] through [E].

Start the engine [C].
Accelerate the vehicle to 30 km/h (18.65 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.86 mph) or less [D]. Repeat step [D] 5 times.
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Enter the following menus: Powertrain / Engine / Trouble Codes [E].
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: P070312.

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 has a malfunction.

WIRING DIAGRAM

Refer to DTC P05042B.

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

Using the Techstream, the Data List item "Stop Light SW" can be read.
Click here
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.	READ VALUE USING TECHSTREAM (STOP LIGHT SW)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Engine / Data List / Stop Light SW.

Powertrain > Engine > Data List

Tester Display
Stop Light SW

(e) Read the Data List displayed on the Techstream.

OK:

Techstream Display	Measurement Item/Range (display)	Normal Condition
Stop Light SW	Stop light switch status: ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released

CHECK FOR INTERMITTENT PROBLEMS

2.	CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION

(a) Check the stop light switch assembly installation.

Click here

OK:

Stop light switch assembly is installed correctly.

SECURELY REINSTALL STOP LIGHT SWITCH ASSEMBLY

3.	CHECK TERMINAL VOLTAGE (STP VOLTAGE)

(a) Disconnect the ECM connector.

Brake pedal depressed

Brake pedal released

Front view of wire harness connector

(to ECM)

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

Standard Voltage:

Tester Connection	Brake Pedal Operation	Specified Condition
A18-27 (STP) - Body ground	Released	Below 1.5 V
A18-27 (STP) - Body ground	Depressed	7.5 to 14 V

HINT:

If there is a short in the STP terminal circuit, there may be a malfunction in the circuit of a connected ECU.

REPLACE ECM

4.	CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

(a) Disconnect the stop light switch assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A33-3 (L) or A18-27 (STP) - Other terminals	Always	10 kΩ or higher

REPLACE STOP LIGHT SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

Starter Relay Circuit Short to Battery (P061512)

Transmission Range Sensor "A" Circuit Open (P070513,P070562)

See More:

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