Toyota Yaris: Sfi System / Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground (P022011)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground (P022011)

DESCRIPTION

Refer to DTC P012011.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
P022011	Throttle/Pedal Position Sensor/Switch "B" Circuit Short to Ground	The output voltage of VTA2 is below 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	SAE: 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

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON [A].
Turn the GTS 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.

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 steps [B] through [D] again.

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 7.5° 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 ignition switch is turned off.

WIRING DIAGRAM

Refer to DTC P012011.

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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.

PROCEDURE

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

(a) Read the values displayed on the GTS.

Powertrain > Engine > Data List

Tester Display
Throttle Position Sensor No.2 Voltage

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

(c) 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 below 2.05 V to higher than 4.75 V	A
Does not change from below 2.05 V	B

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
D19-5(VC) - D104-109(VCTA)	Always	Below 1 Ω
D19-4(VTA2) or D104-87(VTA2) - Body ground	Always	10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

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