Toyota Avalon (XX50): Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground (P022011). Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Battery or Open (P022015). Evaporative Emission System Switching

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground (P022011). Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Battery or Open (P022015). Evaporative Emission System Switching

Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground (P022011)

DESCRIPTION

Refer to DTC P012011.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P022011	Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground	The output voltage of VTA2 is less than 2.05 V for 2 seconds or more (1 trip detection logic).	Throttle position sensor (throttle body with motor assembly) Short in VTA2 circuit Open in VCTA circuit ECM	Comes on	DTC stored	SAE Code: P0222

MONITOR DESCRIPTION

The ECM uses the throttle position sensor to monitor the throttle valve opening angle. If the VTA2 terminal voltage is less than the threshold, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs	P0222: Throttle position sensor 2 range check (low voltage)
Required Sensors/Components (Main)	Throttle position sensor
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	2 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	-
Battery voltage	8 V or higher
Engine switch	On (IG)
Starter	Off

TYPICAL MALFUNCTION THRESHOLDS

VTA2 voltage

Less than 2.05 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.
With the vehicle stationary, fully depress and release the accelerator pedal [B].
Idle the engine for 2 seconds or more [C].
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
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: P022011.

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, perform steps [B] through [D] again.
[A] to [D]: 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 this DTC is 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 angle, to allow the vehicle to continue running at a minimal 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 turned off.

WIRING DIAGRAM

Refer to DTC P012011.

Click here

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.	READ VALUE USING TECHSTREAM (THROTTLE POSITION SENSOR NO.2 VOLTAGE)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Powertrain / Engine / Data List / Throttle Position Sensor No.2 Voltage.

Powertrain > Engine > Data List

Tester Display
Throttle Position Sensor No.2 Voltage

(e) Read the values displayed on the Techstream.

(f) Disconnect the throttle body with motor assembly connector.

(g) Compare the value of the Data List item Throttle Position Sensor No.2 Voltage after disconnecting the throttle body with motor assembly connector to the value when the connector was connected.

Result	Proceed to
Changes from less than 2.05 V to higher than 4.75 V	A
Does not change from less than 2.05 V	B

HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Click here

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)

(a) Disconnect the throttle body with motor assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C24-5 (VC) - C56-121 (VCTA)	Always	Below 1 Ω
C24-4 (VTA2) or C56-89 (VTA2) - Body ground	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Battery or Open (P022015)

DESCRIPTION

Refer to DTC P012011.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P022015	Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Battery or Open	The output voltage of VTA2 is higher than 4.75 V, and VTA1 is less than 2.367 V for 2 seconds or more (1 trip detection logic).	Throttle position sensor (throttle body with motor assembly) Open in VTA2 circuit Short between VCTA and VTA2 circuits ECM	Comes on	DTC stored	SAE Code: P0223

MONITOR DESCRIPTION

The ECM uses the throttle position sensor to monitor the throttle valve opening angle. If the VTA2 terminal voltage is higher than the threshold, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs	P0223: Throttle position sensor 2 range check (high voltage)
Required Sensors/Components (Main)	Throttle position sensor
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	2 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	-
Battery voltage	8 V or higher
Engine switch	On (IG)
Starter	Off

TYPICAL MALFUNCTION THRESHOLDS

VTA2 voltage when VTA1 less than 2.367 V

Higher than 4.75 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.
With the vehicle stationary, fully depress and release the accelerator pedal [B].
Idle the engine for 2 seconds or more [C].
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
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: P022015.

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, perform steps [B] through [D] again.
[A] to [D]: 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

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

WIRING DIAGRAM

Refer to DTC P012011.

Click here

CAUTION / NOTICE / HINT

HINT:

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)

(a) Disconnect the throttle body with motor assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C24-4 (VTA2) - C56-89 (VTA2)	Always	Below 1 Ω
C24-5 (VC) or C56-121 (VCTA) - Other terminals	Always	10 kΩ or higher
C24-4 (VTA2) or C56-89 (VTA2) - Other terminals	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK TERMINAL VOLTAGE (POWER SOURCE OF THROTTLE POSITION SENSOR)

*a	Front view of wire harness connector (to Throttle Body with Motor Assembly)

(a) Disconnect the throttle body with motor assembly connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
C24-5 (VC) - C24-3 (E2)	Engine switch on (IG)	4.5 to 5.5 V
C24-4 (VTA2) - C24-3 (E2)	Engine switch on (IG)	3.0 to 5.0 V

REPLACE ECM

3.	CHECK HARNESS AND CONNECTOR (RESISTANCE OF ECM)

(a) Disconnect the throttle body with motor assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C24-5 (VC) - C24-4 (VTA2)	Engine switch off	190 to 210 kΩ

REPLACE ECM

4.	READ VALUE USING TECHSTREAM (THROTTLE POSITION SENSOR NO.2 VOLTAGE)

*a	Front view of wire harness connector (to Throttle Body with Motor Assembly)

(a) Disconnect the throttle body with motor assembly connector.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List / Throttle Position Sensor No.2 Voltage.

Powertrain > Engine > Data List

Tester Display
Throttle Position Sensor No.2 Voltage

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

HINT:

Use the snapshot function to record the value displayed or make a note of it.

(g) Turn the engine switch off.

(h) Turn the Techstream off.

(i) Connect terminals 4 (VTA2) and 3 (E2) of the throttle body with motor assembly connector on the wire harness side.

NOTICE:

If the VTA2 terminal voltage or the resistance between VTA2 and E2 is abnormal and terminals 4 (VTA2) and 3 (E2) of the throttle body with motor assembly connector are connected, excessive current may flow through the circuit. In this case, do not connect the terminals.

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

(k) Turn the Techstream on.

(l) Enter the following menus: Powertrain / Engine / Data List / Throttle Position Sensor No.2 Voltage.

Powertrain > Engine > Data List

Tester Display
Throttle Position Sensor No.2 Voltage

(m) Compare the vehicle of the Data List item Throttle Position Sensor No.2 Voltage after the circuit is shorted to the value when the throttle body with motor assembly connector was connected.

Result	Proceed to
Changes from higher than 4.75 V to less than 2.05 V	A
Does not change from higher than 4.75 V	B

HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Click here

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

REPLACE ECM

Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off (P24187F)

DTC SUMMARY

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P24187F	Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off	Following condition met during key-off EVAP monitor: EVAP pressure change when vent valve closed (on) less than 0.3 kPa(gauge) [0.044 psi(gauge)]	Canister pump module (reference orifice, leak detection pump, vent valve) Wire harness or connector (Canister pump module - ECM) Canister (filter inside canister clogged) ECM	Comes on	DTC stored	SAE Code: P2420

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P24187F

Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off

Following condition met during key-off EVAP monitor:

EVAP pressure change when vent valve closed (on) less than 0.3 kPa(gauge) [0.044 psi(gauge)]

Canister pump module (reference orifice, leak detection pump, vent valve)
Wire harness or connector (Canister pump module - ECM)
Canister (filter inside canister clogged)
ECM

Comes on

DTC stored

SAE Code: P2420

DTC No.	Monitoring Item	Detection Timing	Detection Logic	SAE
P24187F	Vent valve stuck open (vent)	EVAP monitoring (engine switch off)	2 trip	P2420

DTC No.

Monitoring Item

Detection Timing

Detection Logic

SAE

P24187F

Vent valve stuck open (vent)

EVAP monitoring

(engine switch off)

2 trip

P2420

HINT:

The vent valve is built into the canister pump module.

DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System.

Click here

MONITOR DESCRIPTION

5 hours* after the engine switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

HINT:

*: If the engine coolant temperature is not less than 35°C (95°F) 5 hours after the engine switch is turned off, the monitor check starts 2 hours later. If it is still not less than 35°C (95°F) 7 hours after the engine switch is turned off, the monitor check starts 2.5 hours later.

Sequence	Operation	Description	Duration
-	ECM activation	Activated by soak timer, 5, 7 or 9.5 hours after engine switch turned off.	-
A	Atmospheric pressure measurement	Vent valve is turned off (vent) and EVAP system pressure is measured by ECM in order to register atmospheric pressure. If pressure in EVAP system is not between 70 to 110 kPa(abs) [10.15 to 15.95 psi(abs)], ECM cancels EVAP system monitor.	60 seconds
B	First reference pressure measurement	In order to determine reference pressure, leak detection pump creates negative pressure (vacuum) through reference orifice and then ECM checks if leak detection pump and vent valve operate normally.	360 seconds
C	EVAP system pressure measurement	Vent valve is turned on (closed) to shut EVAP system. Negative pressure (vacuum) is created in EVAP system, and EVAP system pressure is then measured. Write down measured value as it will be used in leak check If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor.	15 minutes*
D	Purge VSV monitor	Purge VSV is opened and then EVAP system pressure is measured by ECM. Large increase indicates normal.	10 seconds
E	Second reference pressure measurement	After second reference pressure measurement, leak check is performed by comparing first and second reference pressure measurements. If stabilized system pressure is higher than second reference pressure, ECM determines that EVAP system is leaking.	60 seconds
-	Final check	Atmospheric pressure is measured and then monitoring result is recorded by ECM.	-

*: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

*1	Purge VSV: Off (Closed)	*2	Purge VSV: On (Open)
*3	Vent Valve: Off (Vent)	*4	Vent Valve: On (Closed)
*5	Leak Detection Pump: Off	*6	Leak Detection Pump: On
*7	Reference Orifice (0.02 inch)	*8	Canister Pressure Sensor
*9	Canister	*10	Fuel Tank
*11	Canister Pump Module	*12	Canister Filter
*a	Operation A: Atmospheric Pressure Measurement	*b	Operation B, E: Reference Pressure Measurement
*c	Operation C: EVAP System Pressure Measurement	*d	Operation D: Purge VSV Monitor
*e	Atmospheric Pressure	*f	Negative Pressure

P24187F: Vent Valve Stuck Open (Vent)

In operation C, the vent valve turns on (closed) and the EVAP system pressure is then measured by the ECM using the canister pressure sensor to conduct an EVAP leak check. If the pressure does not increase when the vent valve is open, the ECM interprets this as the vent valve being stuck open. The ECM illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Required Sensors/Components (Main)	Purge VSV Canister pump module
Required Sensors/Components (Related)	-
Frequency of Operation	Once per driving cycle
Duration	Within 7 minutes (varies with amount of fuel in tank)
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Atmospheric pressure	70 kPa(abs) [10.15 psi(abs)] or higher, and less than 110 kPa(abs) [15.95 psi(abs)]
Battery voltage	10.5 V or higher
Vehicle speed	Less than 4 km/h (2.5 mph)
Engine switch	Off
Time after key-off	5, 7 or 9.5 hours
Canister pressure sensor malfunction (P0452, P0453)	Not detected
Purge VSV	Not operated by scan tool
Vent valve	Not operated by scan tool
Leak detection pump	Not operated by scan tool
Both of following conditions met before key-off	1 and 2
1. Duration that vehicle is driven	5 minutes or more
2. EVAP purge operation	Performed
Engine coolant temperature	4.4°C (40°F) or higher, and less than 35°C (95°F)
Intake air temperature	4.4°C (40°F) or higher, and less than 35°C (95°F)

TYPICAL MALFUNCTION THRESHOLDS

EVAP pressure change after EVAP canister vent valve on

Less than 0.3 kPa(gauge) [0.044 psi(gauge)]

MONITOR RESULT

Refer to EVAP system.

Click here

CONFIRMATION DRIVING PATTERN

NOTICE:

The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
Do not perform the Evaporative System Check when the fuel tank is higher than 85% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
Do not run the engine during this operation.
When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature less than 35°C (95°F).

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.
Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [B].
After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P24187F.

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.

PROCEDURE

1.	GO TO EVAP SYSTEM

(a) Refer to EVAP system.

Click here

END

Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled (P21352B)

Random/Multiple Cylinder Misfire Detected (P030000,P030027,P030085-P030600)

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