| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026PUD |
| Model Year Start: 2023 | Model: Corolla HV | Prod Date Range: [09/2022 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P212012,...,P21382B; Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery; 2023 - 2025 MY Corolla HV [09/2022 - ] | ||
|
DTC |
P212012 |
Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery |
|
DTC |
P212014 |
Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open |
|
DTC |
P21201C |
Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range |
|
DTC |
P21201F |
Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent |
|
DTC |
P212512 |
Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery |
|
DTC |
P212514 |
Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open |
|
DTC |
P21251C |
Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range |
|
DTC |
P21251F |
Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent |
|
DTC |
P213800 |
Throttle/Pedal Position Sensor/Switch "D"/" E" Voltage Correlation |
|
DTC |
P21382B |
Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled |
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU calculates the accelerator pedal opening angle based on the output voltage of the main sensor (VPA) and sub sensor (VPA2) of the accelerator pedal (with sensor) rod assembly. If the output voltage of either the main sensor (VPA) or sub sensor (VPA2) deviates, a malfunction will be detected.
The cause of this malfunction may be one of the following:
- Accelerator pedal (with sensor) rod assembly malfunction
- Wire harness or connector malfunction
- Hybrid vehicle control ECU malfunction
DESCRIPTION
The accelerator pedal position sensor is built into the accelerator pedal (with sensor) rod assembly and detects how much the pedal is depressed. This is a non-contact sensor with Hall elements. There are 2 outputs from the sensor. One is used to detect the accelerator pedal position and the other is used as a confirmation to allow the detection of a malfunction in the sensor itself. Voltage is output from the accelerator pedal position sensor to terminals VPA and VPA2 of the hybrid vehicle control ECU. This voltage varies from 0 to 5 V in accordance with the accelerator pedal position. Terminal VPA2 is primarily used to detect a malfunction in the sensor itself. The hybrid vehicle control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA and VPA2.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
Note |
|---|---|---|---|---|---|---|
|
P212012 |
Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Auxiliary Battery |
Short to +B in the main sensor circuit: The main sensor voltage is 4.8 V or more for 2 seconds. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2123 |
|
P212014 |
Throttle/Pedal Position Sensor/Switch "D" Circuit Short to Ground or Open |
Open or short to ground in the main sensor circuit: The main sensor voltage is 0.4 V or less for 0.5 seconds. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2122 |
|
P21201C |
Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range |
Internal malfunction in the main sensor: Main sensor output changes rapidly (detected when there are no circuit malfunctions such as an open or short). (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2121 |
|
P21201F |
Throttle/Pedal Position Sensor/Switch "D" Circuit Intermittent |
Main sensor circuit wiring malfunction or level is not stable: Main sensor voltage is 0.4 V or less or 4.8 V or more for a certain period of time. (Both of the following conditions are met: The main sensor voltage is 0.4 V or less for a certain period of time and 4.8 V or more for a certain period of time.) (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2120 |
|
P212512 |
Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Auxiliary Battery |
Short to +B in the sub sensor circuit: Main sensor is normal and sub sensor voltage is 4.8 V or more for 2 seconds. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2128 |
|
P212514 |
Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Ground or Open |
Open or short to ground in the sub sensor circuit: The sub sensor voltage is 1.2 V or less for 0.5 seconds. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2127 |
|
P21251C |
Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range |
Internal malfunction of the sub sensor: Sub sensor output changes rapidly (detected when there are no circuit malfunctions such as an open or short). (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2126 |
|
P21251F |
Throttle/Pedal Position Sensor/Switch "E" Circuit Intermittent |
Sub sensor circuit wiring malfunction or level is not stable: When the main sensor circuit is normal, the sub sensor voltage is 1.2 V or less or 4.8 V or more for a certain period of time. (Both of the following conditions are met: Sub sensor voltage is 1.2 V or less for a certain period of time, and the main sensor is normal and sub sensor voltage is 4.8 V or more for a certain period of time.) (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2125 |
|
P213800 |
Throttle/Pedal Position Sensor/Switch "D"/" E" Voltage Correlation |
Difference between the main sensor value and sub sensor value is large. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2138 |
|
P21382B |
Throttle/Pedal Position Sensor/Switch "D"/"E" Signal Cross Coupled |
Main or sub sensor circuit wiring malfunction: The difference in voltage between the main sensor and sub sensor is 0.02 V or less, or a low output malfunction continues in both the main and sub sensors for a certain period of time. (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
SAE Code: P2138 |
MONITOR DESCRIPTION
The hybrid vehicle control ECU calculates the differences of the voltage of main accelerator sensor and sub accelerator sensor. If the differences exceed prescribed values, the hybrid vehicle control ECU determines that there is a malfunction in the accelerator sensor circuit. If the hybrid vehicle control ECU detects this malfunction, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P2123 (INF P212012): Accelerator Pedal Position Sensor (APP Sensor) Sensor 1 Range Check (High voltage) P2122 (INF P212014): Accelerator Pedal Position Sensor (APP Sensor) Sensor 1 Range Check (Low voltage) P2121 (INF P21201C): Throttle/Pedal Position Sensor/Switch "D" Voltage Out of Range P2120 (INF P21201F): Accelerator Pedal Position Sensor (APP Sensor) Sensor 1 Range Check (Chattering) P2128 (INF P212512): Accelerator Pedal Position Sensor (APP Sensor) Sensor 2 Range Check (High voltage) P2127 (INF P212514): Accelerator Pedal Position Sensor (APP Sensor) Sensor 2 Range Check (Low voltage) P2126 (INF P21251C): Throttle/Pedal Position Sensor/Switch "E" Voltage Out of Range P2125 (INF P21251F): Accelerator Pedal Position Sensor (APP Sensor) Sensor 2 Range Check (Chattering) P2138 (INF P213800): Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation P2138 (INF P21382B): Accelerator Pedal Position Sensor (APP Sensor) Correlation |
|
Required sensors/components |
Throttle/Pedal Position Sensor/Switch |
|
Frequency of operation |
Continuous |
|
Duration |
TMC's intellectual property |
|
MIL operation |
Immediately / 1 driving cycle |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU |
DTC P2123 (INF P212012) is not detected DTC P2122 (INF P212014) is not detected DTC P2121 (INF P21201C) is not detected DTC P2120 (INF P21201F) is not detected DTC P2128 (INF P212512) is not detected DTC P2127 (INF P212514) is not detected DTC P2126 (INF P21251C) is not detected DTC P2125 (INF P21251F) is not detected DTC P2138 (INF P213800) is not detected DTC P2138 (INF P21382B) is not detected |
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
![2023 - 2025 MY Corolla HV [09/2022 - ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and 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 2 minutes or more.
- Turn the ignition switch to ON and turn the GTS on.
-
Wait for approximately 10 seconds with the ignition switch ON (READY) and shift lever in P, then fully depress and release the accelerator pedal several times.[*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
-
Check the DTC judgment result.
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 shows INCOMPLETE, perform the normal judgment procedure again.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING GTS (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE %, ACCELERATOR POSITION SENSOR NO. 2 VOLTAGE %) |
(a) Read the Data List.
Powertrain > Hybrid Control > Data List
|
Tester Display |
|---|
|
Accelerator Position Sensor No.1 Voltage % |
|
Accelerator Position Sensor No.2 Voltage % |
Standard:
|
Tester Display |
Accelerator Pedal Condition |
Specified Condition |
|---|---|---|
|
Accelerator Position Sensor No. 1 Voltage % |
Not depressed |
10 to 22% |
|
Fully depressed |
52 to 90% |
|
|
Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) |
Value changes progressively |
|
|
Accelerator Position Sensor No. 2 Voltage % |
Not depressed |
24 to 40% |
|
Fully depressed |
68 to 99% |
|
|
Not depressed → Fully depressed → Not depressed (Accelerator pedal should be operated slowly) |
Value changes progressively |
(b) Turn the ignition switch off.
| OK |
|
|
|
2. |
CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL (WITH SENSOR) ROD ASSEMBLY CONNECTOR) |
|
(a) Check the connector connections and contact pressure of the relevant terminals for the accelerator pedal (with sensor) rod assembly connector. Click here
OK: The connectors are connected securely and there are no contact pressure problems. |
|
| NG |
|
CONNECT SECURELY |
|
|
3. |
CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) |
Click here
| NG |
|
CONNECT SECURELY |
|
|
4. |
CHECK HYBRID VEHICLE CONTROL ECU (CHECK VOLTAGE) |
(a) Disconnect the accelerator pedal (with sensor) rod assembly connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A54-4 (VCPA) - A54-5 (EPA) |
Ignition switch ON |
4.5 to 5.5 V |
|
A54-1 (VCP2) - A54-2 (EPA2) |
Ignition switch ON |
4.5 to 5.5 V |
(d) Turn the ignition switch off.
(e) Reconnect the accelerator pedal (with sensor) rod assembly connector.
| NG |
|
|
|
5. |
CHECK HYBRID VEHICLE CONTROL ECU (CHECK RESISTANCE) |
(a) Disconnect the accelerator pedal (with sensor) rod 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) - A54-5 (EPA) |
Ignition switch off |
36.60 to 41.61 kΩ |
|
A54-3 (VPA2) - A54-2 (EPA2) |
Ignition switch off |
36.60 to 41.61 kΩ |
(c) Reconnect the accelerator pedal (with sensor) rod assembly connector.
| OK |
|
| NG |
|
|
6. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL (WITH SENSOR) ROD ASSEMBLY) |
(a) Disconnect the hybrid vehicle control ECU connector.
(b) Disconnect the accelerator pedal (with sensor) rod assembly connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-38 (VCPA) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-37 (EPA) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-26 (VCP2) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-25 (EPA2) - Body ground |
Ignition switch ON |
Below 1 V |
NOTICE:
Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the ignition switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-38 (VCPA) - A54-4 (VCPA) |
Ignition switch off |
Below 1 Ω |
|
A161-37 (EPA) - A54-5 (EPA) |
Ignition switch off |
Below 1 Ω |
|
A161-26 (VCP2) - A54-1 (VCP2) |
Ignition switch off |
Below 1 Ω |
|
A161-25 (EPA2) - A54-2 (EPA2) |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-38 (VCPA) or A54-4 (VCPA) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-37 (EPA) or A54-5 (EPA) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-26 (VCP2) or A54-1 (VCP2) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-25 (EPA2) or A54-2 (EPA2) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(g) Reconnect the accelerator pedal (with sensor) rod assembly connector.
(h) Reconnect the hybrid vehicle control ECU connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL (WITH SENSOR) ROD ASSEMBLY) |
(a) Disconnect the hybrid vehicle control ECU connector.
(b) Disconnect the accelerator pedal (with sensor) rod assembly connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-36 (VPA) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-39 (VPA2) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-37 (EPA) - Body ground |
Ignition switch ON |
Below 1 V |
|
A161-25 (EPA2) - Body ground |
Ignition switch ON |
Below 1 V |
NOTICE:
Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the ignition switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-36 (VPA) - A54-6 (VPA) |
Ignition switch off |
Below 1 Ω |
|
A161-37 (EPA) - A54-5 (EPA) |
Ignition switch off |
Below 1 Ω |
|
A161-39 (VPA2) - A54-3 (VPA2) |
Ignition switch off |
Below 1 Ω |
|
A32-25 (EPA2) - A54-2 (EPA2) |
Ignition switch off |
Below 1 Ω |
Standard Resistance (Check for Short):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A161-36 (VPA) or A54-6 (VPA) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-37 (EPA) or A54-5 (EPA) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-39 (VPA2) or A54-3 (VPA2) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
|
A161-25 (EPA2) or A54-2 (EPA2) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(g) Reconnect the accelerator pedal (with sensor) rod assembly connector.
(h) Reconnect the hybrid vehicle control ECU connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|