| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HTMY |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [03/2019 - 03/2023] |
| Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P21382B; Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation Signal Cross Coupled; 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 03/2023] | ||
|
DTC |
P21382B |
Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation Signal Cross Coupled |
DESCRIPTION
HINT:
These DTCs relate to the accelerator pedal position sensor.
Refer to DTC P212012.
Click here
![2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 03/2023]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P212012; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Battery+](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P21382B |
Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation Signal Cross Coupled |
Diagnosis condition:
Abnormal condition:
Malfunction time:
Trip logic:
Detection conditions:
Sensors/components used for detection:
|
|
Comes on |
DTC stored |
|
MONITOR DESCRIPTION
When the ignition switch is turned ON and the difference in the output voltage of VPA and VPA2 is 0.02 V or less for 2 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 |
P2138: Accelerator pedal position sensor range check (correlation) |
|
Required Sensors/Components (Main) |
Accelerator pedal sensor assembly |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
2.0 seconds |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
TYPICAL MALFUNCTION THRESHOLDS
|
Difference between VPA and VPA2 voltages |
0.02 V or less |
CONFIRMATION DRIVING PATTERN
Refer to DTC P212012.
Click here
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 ignition switch is turned off.
WIRING DIAGRAM
Refer to DTC P212012.
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 (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE AND ACCELERATOR POSITION SENSOR NO. 2 VOLTAGE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No.1 Voltage and Accelerator Position Sensor No.2 Voltage.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Accelerator Position Sensor No.1 Voltage |
|
Accelerator Position Sensor No.2 Voltage |
(e) Read the values displayed on the Techstream.
|
Result |
Proceed to |
|---|---|
|
The value of Accelerator Position Sensor No. 1 and Accelerator Position Sensor No. 2 is approximately 0 V |
A |
|
Other than above |
B |
| B |
|
|
|
2. |
CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY) |
(a) Confirm the connection status of the accelerator pedal sensor assembly connector.
OK:
The connector is securely connected.
| OK |
|
|
|
3. |
CONNECTOR SECURELY (ACCELERATOR PEDAL SENSOR ASSEMBLY) |
(a) Connect the accelerator pedal sensor assembly connector.
|
|
4. |
READ VALUE USING TECHSTREAM (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE AND ACCELERATOR POSITION SENSOR NO. 2 VOLTAGE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No.1 Voltage and Accelerator Position Sensor No.2 Voltage.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Accelerator Position Sensor No.1 Voltage |
|
Accelerator Position Sensor No.2 Voltage |
(e) Read the values displayed on the Techstream.
OK:
Difference between the value of Accelerator Position Sensor No. 1 and Accelerator Position Sensor No. 2 is 0.02 V or more
| NEXT |
|
END |
|
5. |
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN ACCELERATOR PEDAL SENSOR ASSEMBLY CIRCUIT) |
(a) Disconnect the accelerator pedal sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A54-6 (VPA) - A54-3 (VPA2) |
Always |
10 kΩ or higher |
| OK |
|
|
|
6. |
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) - A54-3 (VPA2) or A47-55 (VPA) - A47-58 (VPA2) |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|