| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001N33F |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - 09/2022] |
| Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): P0BFD62,P1C671F; Drive Motor A" Phase U-V-W Current Sensor Signal Compare Failure"; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] | ||
|
DTC |
P0BFD62 |
Drive Motor A" Phase U-V-W Current Sensor Signal Compare Failure" |
|
DTC |
P1C671F |
Drive Motor "A" Phase U-V-W Current Sensor Circuit Intermittent |
DTC SUMMARY
MALFUNCTION DESCRIPTION
These DTCs indicate that the current sensor value is abnormal. The cause of this malfunction may be one of the following:
Internal inverter malfunction
- Current sensor malfunction
- Inverter with converter assembly internal circuit malfunction
DESCRIPTION
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P0BFD62 |
Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure |
Motor inverter current sensor characteristic malfunction: The value of the total output of the U, V and W phase current sensors exceeds the threshold.*1 (1 trip detection logic) |
|
Comes on |
Master Warning: Comes on |
|
P1C671F |
Drive Motor "A" Phase U-V-W Current Sensor Circuit Intermittent |
The value of the total output of the U, V and W phase current sensors exceeds the threshold detected when DTC P0C7917, P0D3319, P1C5D19 or P1C5F19 is stored. (1 trip detection logic) |
|
Does not come on |
Master Warning: Does not come on |
HINT:
*1: Under normal conditions, the value of the total output of the U, V and W phase current sensors is approximately 0.
MONITOR DESCRIPTION
If the value of the total output of the U, V and W phase current sensors exceeds a threshold, a malfunction will be detected, the motor generator control ECU will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0BFD (INF P0BFD62): Drive Motor "A" Phase U-V-W Current Sensor Correlation |
|
Required sensors/components |
Motor inverter phase U current sensor Motor inverter phase V current sensor Motor inverter phase W current sensor |
|
Frequency of operation |
Continuous |
|
Duration |
TMC's intellectual property |
|
MIL operation |
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
|
Motor generator control ECU |
DTC P0BFD (INF P0BFD62) 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
![2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): UTILITY](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- With power switch on (IG) and wait for 5 seconds or more. [*1]
- Turn the power switch on (READY) with the shift lever in P and wait for 5 seconds or more. [*2]
- Depress the accelerator pedal of the vehicle with the engine stopped and the shift lever in P to start the engine. [*3]
-
Drive the vehicle for approximately 10 minutes referring to the following freeze frame data items: "Vehicle Speed". [*4]
HINT:
[*1] to [*4]: 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 / Motor Generator / 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 or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
Refer to the wiring diagram for the Motor High-voltage Circuit.
Click here
CAUTION / NOTICE / HINT
CAUTION:
-
Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
- Inspecting the high-voltage system
- Disconnecting the low voltage connector of the inverter with converter assembly
- Disconnecting the low voltage connector of the HV battery
-
To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
-
After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
-
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
*a
Without waiting for 10 minutes
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
PROCEDURE
|
1. |
CHECK DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Powertrain > Motor Generator > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
P0BFD62 or P1C671F only is output, or DTCs except the ones in the table below are also output. |
A |
|
DTCs of hybrid control system in the table below are output. |
B |
|
DTCs of motor generator control system in the table below are output. |
C |
Table 1
|
Malfunction Content |
System |
Relevant DTC |
|
|---|---|---|---|
|
Insulation Malfunction |
Hybrid control system |
P1C7C49 |
Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure |
|
P1C7D49 |
Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure |
||
|
P1C7E49 |
Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure |
||
|
P1C7F49 |
Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure |
||
|
High voltage system malfunction |
Hybrid control system |
P0AA649 |
Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure |
Table 2
|
Malfunction Content |
System |
Relevant DTC |
|
|---|---|---|---|
|
Microcomputer malfunction |
Hybrid control system |
P0A1B49 |
Drive Motor "A" Control Module Internal Electronic Failure |
|
Motor generator control system |
P1C2B1C |
Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range |
|
|
P1C2B49 |
Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure |
||
|
Power source circuit malfunction |
Motor generator control system |
P06B01C |
Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range |
|
P06D61C |
Generator Control Module Offset Power Circuit Voltage Out of Range |
||
|
Communication malfunction |
Motor generator control system |
P312487 |
Lost Communication between Drive Motor "A" and HV ECU Missing Message |
|
System malfunction |
Motor generator control system |
P0A7873 |
Drive Motor "A" Inverter Actuator Stuck Closed |
HINT:
-
P0BFD62 or P1C671F may be output as a result of the malfunctions indicated by the DTCs above.
- The chart above is listed in inspection order of priority.
- Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
(e) Turn the power switch off.
| B |
|
| C |
|
|
|
2. |
CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) |
Click here
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (The connector is not connected securely.) |
B |
|
NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) |
C |
| B |
|
CONNECT SECURELY |
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK MOTOR HIGH-VOLTAGE CIRCUIT |
Click here
HINT:
If the "Motor High-voltage Circuit" inspection results are normal, perform the next step.
| NEXT |
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