Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001FCY8
Model Year Start: 2019 Model: Corolla Hatchback Prod Date Range: [06/2018 - 03/2019]
Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P212014; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open; 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]

DTC

P212014

Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open

DESCRIPTION

HINT:

These DTCs relate to the accelerator pedal position sensor.

Refer to DTC P212012.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P212012; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Battery+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P212014

Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open

Diagnosis condition:

  • Engine switch on (IG)

Abnormal condition:

  • VPA is 0.4 V or less when the accelerator pedal is depressed.

Malfunction time:

  • 0.5 seconds or more

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection:

  • Accelerator pedal sensor assembly
  • Accelerator pedal sensor assembly
  • Open in VCPA circuit
  • Open or ground short in VPA circuit
  • ECM

Comes on

DTC stored

SAE Code: P2122

MONITOR DESCRIPTION

When the engine switch is on (IG), the accelerator pedal is depressed and the VPA voltage is 0.4 V or less for 0.5 seconds or more, the ECM determines that the accelerator pedal sensor assembly circuit is malfunctioning and illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2122: Accelerator pedal position sensor 1 range check (low voltage)

Required Sensors/Components (Main)

Accelerator pedal sensor assembly

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

TYPICAL MALFUNCTION THRESHOLDS

VPA voltage

0.4 V or less

CONFIRMATION DRIVING PATTERN

Refer to DTC P212012.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P212012; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Battery+

FAIL-SAFE

When these DTCs are stored, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM limits the engine output. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

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

WIRING DIAGRAM

Refer to DTC P212012.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P212012; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Battery+

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 TERMINAL VOLTAGE (ACCELERATOR PEDAL SENSOR ASSEMBLY)

*a

Front view of wire harness connector

(to Accelerator Pedal Sensor Assembly)

HINT:

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

(a) Disconnect the accelerator pedal sensor assembly connector.

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A54-4 (VCPA) - Body ground

Engine switch on (IG)

4.5 to 5.5 V
NG

GO TO STEP 4

OK

2.

CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM)

(a) Disconnect the accelerator pedal sensor assembly connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A54-6 (VPA) - A47-55 (VPA)

Always

Below 1 Ω

A54-6 (VPA) or A47-55 (VPA) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK INTERNAL RESISTANCE (ECM)

(a) Turn the engine switch off.

(b) Disconnect the accelerator pedal sensor assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A54-6 (VPA) - A54-5 (EPA)

Engine switch off

28.00 to 40.95 kΩ

HINT:

As voltage is still supplied to the ECM after the engine switch is turned off, this check cannot be performed correctly during the shut-down process.

OK

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

NG

REPLACE ECM 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

4.

CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM)

(a) Disconnect the accelerator pedal sensor assembly connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A54-4 (VCPA) - A47-57 (VCPA)

Always

Below 1 Ω
OK

REPLACE ECM 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR