DESCRIPTION
For a description of the inverter. Refer to DESCRIPTION.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 113 | Motor inverter fail signal detection (System overcurrent) A malfunction is detected in any of the motor components (motor inverter, motor, MG ECU, etc.). (1 trip detection logic) | Wire harness or connector Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly Power management control ECU PCU fuse |
MONITOR DESCRIPTION
If excessive amperage flows through the motor inverter, the motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 121 | Motor inverter overvoltage signal detection (overvoltage due to system malfunction) Overvoltage is detected after boosting. A malfunction is detected in any of the motor components (motor inverter, motor, MG ECU, etc.). (1 trip detection logic) | Wire harness or connector Hybrid battery junction block assembly Inverter with converter assembly Service plug grip (EV battery fuse) Frame wire Hybrid vehicle transaxle assembly Motor cable Power management control ECU PCU fuse |
| DTC No. | Data List |
|---|---|
| P0A78-121 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects overvoltage, it will transmit an overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the motor inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 128 | Abnormal motor current value detection (System malfunction) A malfunction is detected in any of the motor components (motor inverter, motor, MG ECU, etc.). (1 trip detection logic) | Wire harness or connector Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly Power management control ECU PCU fuse |
The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 202 | Malfunction (short circuit) in the motor inverter inside the inverter with converter assembly Current flowing to any of the phases exceeds a certain level after a DTC (indicates a motor inverter malfunction: overheating, overcurrent or circuit malfunction) is stored and the motor inverter is shutdown (1 trip detection logic) | Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable |
The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
The inverter contains a three-phase bridge circuit, which consists of six power transistors (IGBTs) each for MG1 and MG2. The inverter converts high-voltage direct current from the HV battery into three-phase alternating current for generator (MG1) and motor (MG2); it also converts three-phase alternating current supplied by generator (MG1) and motor (MG2) into direct current for the HV battery. The MG ECU controls the actuation of the power transistors (IGBTs). The inverter transmits information necessary for control, such as amperage and voltage, to the MG ECU.
HINT
The term "drive motor A" indicates motor (MG2).
Scheme 255
The MG ECU uses an inverter voltage sensor, which is built into the inverter, to detect boosted high voltage to allow control of the voltage boost.
The inverter voltage sensor outputs voltage that fluctuates between 0 to 5 V according to changes in VH.
The MG ECU monitors the inverter voltage sensor and detects the following malfunctions.
The MG ECU monitors the inverter voltage sensor and detects the following malfunctions.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 266 | Inverter voltage (VH) signal is stuck low Stores a DTC when the VH sensor signal is excessively low. (1 trip detection logic) | Inverter with converter assembly |
| 267 | Inverter voltage (VH) signal is stuck high Stores a DTC when the VH sensor signal is excessively high. (1 trip detection logic) |
| DTC No. | Data List |
|---|---|
| P0A78-266 | VH-Voltage after Boosting |
| P0A78-267 |
RELATED DATA LIST
The MG ECU monitors the inverter voltage (VH) sensor circuit. If the MG ECU detects an open or short in the VH sensor circuit, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 279 | Motor inverter overvoltage signal detection (overvoltage (inverter malfunction)) Overvoltage is detected after boosting.* (1 trip detection logic) | Inverter with converter assembly |
- *: The inverter with converter assembly is suspected to be the main cause of the malfunction.
| DTC No. | Data List |
|---|---|
| P0A78-279 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects overvoltage, it will transmit an overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 282 | Motor inverter overvoltage signal detection (circuit malfunction) (1 trip detection logic) | Inverter with converter assembly |
| DTC No. | Data List |
|---|---|
| P0A78-282 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects a circuit malfunction, it will transmit a motor inverter overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the motor inverter overheats, has a circuit malfunction, or has an internal short, the inverter transmits this information to the MG ECU via the motor inverter fail signal line.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 284 | Motor inverter fail signal detection (overheat) Motor inverter temperature is excessively high. (1 trip detection logic) | Inverter cooling system Cooling fan system Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable PCU fuse Wire harness or connector |
| DTC No. | Data List |
|---|---|
| P0A78-284 | Vehicle Spd Inverter Temp-(MG2) |
RELATED DATA LIST
If the motor inverter overheats, it will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the motor inverter overheats, has a circuit malfunction, or has an internal short, the inverter transmits this information to the MG ECU via the motor inverter fail signal line.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 286 | Motor inverter fail signal detection (circuit malfunction) (1 trip detection logic) | Wire harness or connector Inverter cooling system Cooling fan system Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable PCU fuse |
If the motor inverter detects a circuit malfunction, it will transmit a motor inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the motor inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 287 | Motor inverter fail signal detection (overcurrent due to inverter assembly malfunction)* (1 trip detection logic) | Inverter with converter assembly |
| 807 | Abnormal motor (MG2) current value detection (inverter assembly malfunction)* (1 trip detection logic) |
- *: The inverter with converter assembly is suspected to be the main cause of the malfunction.
P0A78 (INF 287)
If excessive amperage flows through the motor inverter due to an internal short, the motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this information, the power management control ECU will illuminate the MIL and set a DTC.
P0A78 (INF 807)
The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold level for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the MG2 torque execution value does not correspond to the torque command value from the MG ECU to MG2, the power management control ECU will store this DTC.
HINT
The term "drive motor A" indicates motor (MG2).
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 306 | Motor (MG2) torque execution monitoring malfunction The difference between the motor torque requested by the power management ECU and actual motor torque is large. (1 trip detection logic) | Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly |
| DTC No. | Data List |
|---|---|
| P0A78-306 | Motor(MG2) Torq M(MG2) Trq Exec Val Vehicle Spd |
RELATED DATA LIST
If the difference between the requested MG2 torque and the actual MG2 torque exceeds a predetermined value, the MG ECU determines that there is a malfunction in the execution or monitoring of MG2 torque. Then, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 503 | Motor inverter overvoltage signal detection (overvoltage due to MG ECU malfunction) Overvoltage is detected after boosting.* (1 trip detection logic) | Inverter with converter assembly |
- *: The MG ECU, which is built into the inverter with converter assembly, is suspected to be the main cause of the malfunction.
| DTC No. | Data List |
|---|---|
| P0A78-503 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects overvoltage, it will transmit an overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 504 | Motor inverter overvoltage signal detection (overvoltage due to hybrid vehicle transmission assembly malfunction) Overvoltage is detected after boosting.* (1 trip detection logic) | Inverter with converter assembly Hybrid vehicle transaxle assembly Wire harness or connector |
- *: The hybrid vehicle transmission assembly is suspected to be the main cause of the malfunction.
| DTC No. | Data List |
|---|---|
| P0A78-504 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects overvoltage, it will transmit an overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the motor inverter overheats, has a circuit malfunction, or has an internal short, the inverter transmits this information to the MG ECU via the motor inverter fail signal line. If an abnormal amount of current flows through the motor inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 505 | Motor inverter fail signal detection (overcurrent due to MG ECU malfunction)* (1 trip detection logic) | Inverter with converter assembly |
| 806 | Abnormal motor (MG2) current value detection (MG ECU malfunction)* (1 trip detection logic) |
- *: The MG ECU, which is built into the inverter with converter assembly, is suspected to be the main cause of the malfunction.
P0A78 (INF 505)
If excessive amperage flows through the motor inverter due to an internal short, the motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
P0A78 (INF 806)
The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold level for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the motor inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 506 | Motor inverter fail signal detection (overcurrent due to hybrid vehicle transmission assembly malfunction)* (1 trip detection logic) | Wire harness or connector Inverter with converter assembly Hybrid vehicle transaxle assembly |
| 808 | Abnormal motor (MG2) current value detection (Hybrid vehicle transmission assembly malfunction)* (1 trip detection logic) |
- *: The hybrid vehicle transmission assembly is suspected to be the main cause of the malfunction.
P0A78 (INF 506)
If excessive amperage flows through the motor inverter due to an internal short, the motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
P0A78 (INF808)
The MG ECU monitors the motor inverter electric current. If the current exceeds the threshold level for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 565 | Motor inverter overvoltage signal is detected (VH sensor circuit malfunction) and voltage after boosting does not change for a certain period of time. (1 trip detection logic) | Inverter with converter assembly |
| DTC No. | Data List |
|---|---|
| P0A78-565 | VH-Voltage after Boosting |
RELATED DATA LIST
If the motor inverter detects a circuit malfunction, it will transmit a motor inverter overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
The signal line from the inverter voltage (VH) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0A78-586 is output, replace the inverter with converter assembly.
HINT
The term "drive motor A" indicates MG2.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A78 | 586 | Inverter voltage (VH) sensor performance problem During inverter voltage does not boosted difference between "VH-Voltage after Boosting" and "VL-Voltage before Boosting" is large and difference between "VH-Voltage after Boosting" and "Power Resource VB" is large. (1 trip detection logic) | Inverter with converter assembly |
| DTC No. | Data List |
|---|---|
| P0A78-586 | VL-Voltage before Boos VH-Voltage after Boosting Power Resource VB |
RELATED DATA LIST
The power management control ECU monitors the inverter voltage (VH) sensor signal. If the power management control ECU detects a fault in the sensor signal, the power management control ECU interprets this as a VH sensor failure. The power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 122 | Generator inverter fail signal detection (overcurrent due to system malfunction) A malfunction is detected in any of the generator components (generator inverter, generator, MG ECU, etc.). (1 trip detection logic) | Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable Wire harness or connector PCU fuse |
If excessive amperage flows through the generator inverter, the generator inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 130 | Abnormal generator (MG1) current value detection (system malfunction) A malfunction is detected in any of the generator components (generator inverter, generator, MG ECU, etc.). (1 trip detection logic) | Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable Wire harness or connector PCU fuse |
If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 203 | Generator inverter short circuit Current flowing to any of the phases exceeds a certain level after a DTC (indicates a generator inverter malfunction: overheating, overcurrent or circuit malfunction) is stored and the generator inverter is shutdown. (1 trip detection logic) | Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable |
The MG ECU monitors the generator inverter electric current. If the current exceeds the threshold for a specified period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 322 | Generator inverter fail signal detection (overheat) When the generator inverter temperature is excessively high. (1 trip detection logic) | Inverter cooling system Cooling fan system Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable Wire harness or connector PCU fuse |
HINT
Other than the inverter with converter assembly, the power management control ECU or hybrid vehicle transaxle assembly may be the cause of the malfunction.
| DTC No. | Data List |
|---|---|
| P0A7A-322 | Inverter Temp- (MG1) Sub Total Distance Traveled Operation History Data MG1 (Generator) Inverter Temperature High |
RELATED DATA LIST
The following items can be helpful when perform repairs
Data List
- Total Distance Traveled
Operation History Data
- MG1 (Generator) Inverter Temperature High
If the generator inverter overheats, it will transmit an inverter fail signal to the MG ECU. Upon receiving this information, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the generator inverter overheats, has a circuit malfunction or has an internal short, the inverter transmits this information to the MG ECU via the generator inverter fail signal line.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 324 | Generator inverter fail signal detection (circuit malfunction) (1 trip detection logic) | Inverter cooling system Cooling fan system Power management control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Motor cable Wire harness or connector PCU fuse |
If the generator inverter detects a circuit malfunction, it will transmit a generator inverter fail signal to the MG ECU. Upon receiving this information, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 325 | Generator inverter fail signal detection (overcurrent due to inverter assembly malfunction) Overcurrent occurs in the generator inverter.* (1 trip detection logic) | Inverter with converter assembly |
| 810 | Abnormal generator (MG1) current value detection (inverter malfunction) (1 trip detection logic) |
- *: The inverter with converter assembly may be suspected as a main cause of the malfunction.
P0A7A (INF 325)
If excessive amperage flows through the generator inverter due to an internal short, the generator inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this information, the power management control ECU will illuminate the MIL and set a DTC.
P0A7A (INF 810)
If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If the generator (MG1) torque execution value does not correspond to the torque command value from the MG ECU to generator (MG1), the power management control ECU will store this DTC.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 344 | Generator (MG1) torque execution monitoring malfunction The difference between the generator torque requested by the power management ECU and actual motor torque is large. (1 trip detection logic) | Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly Wire harness or connector Power management control ECU |
| DTC No. | Data List |
|---|---|
| P0A7A-344 | Generator(MG1) Torq G (MG1) Trq Exec Val |
RELATED DATA LIST
If the difference between the requested generator (MG1) torque and the actual generator (MG1) torque exceeds a predetermined value, the MG ECU determines that there is a malfunction in the execution or monitoring of generator (MG1) torque. The MG ECU will send information about the malfunction to the power management control ECU. Upon receiving this information, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 517 | Generator inverter fail signal detection (MG ECU malfunction) Overcurrent occurs in the generator inverter.* (1 trip detection logic) | Inverter with converter assembly |
| 809 | Abnormal generator inverter current (overcurrent) detection (MG ECU malfunction) (1 trip detection logic) |
- *: The MG ECU, which is built into in the inverter with converter assembly, can be suspected as a main cause of the malfunction.
P0A7A (INF 517)
If excessive amperage flows through the generator inverter due to an internal short, the generator inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
P0A7A (INF 809)
If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the power management control ECU will illuminate the MIL and set a DTC.
For a description of the inverter. Refer to DESCRIPTION.
If an abnormal amount of current flows through the generator inverter, the MG ECU detects it and sends a signal to inform the power management control ECU of the malfunction.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A7A | 518 | Generator inverter fail signal detection (hybrid vehicle transaxle assembly malfunction) Overcurrent occurs in the generator inverter.* (1 trip detection logic) | Inverter with converter assembly Hybrid vehicle transaxle assembly Wire harness or connector |
| 811 | Abnormal generator inverter current (overcurrent) detection (hybrid vehicle transaxle assembly malfunction) (1 trip detection logic) |
- *: The hybrid vehicle transaxle assembly may be suspected as a main cause of the malfunction.
P0A7A (INF 518)
If excessive amperage flows through the generator inverter, the generator inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.
P0A7A (INF 811)
If the MG ECU detects that the generator inverter current exceeds the threshold level for a period of time, the power management control ECU will illuminate the MIL and set a DTC.
When three-phase alternating current flows through the three-phase windings of the stator coil, a rotating magnetic field is generated in motor. The system controls the rotation of the magnetic field in accordance with the rotating position and speed of the rotor. As a result, the permanent magnets provided in the rotor are pulled in the direction of rotation, generating torque. The generated torque is almost proportional to the amount of current. The system controls motor speed by regulating the frequency of the alternating current. Furthermore, the system properly controls the rotating magnetic field and the angle of the rotor magnets in order to generate high torque in an efficient manner, even at high speeds.
HINT
The term "drive motor A" indicates MG2.
Scheme 256
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A90 | 251 | Motor magnetic force deterioration or same phase short circuit Magnetic force of the motor decreases or a coil circuit in one of the 3 phases remains shorted for a certain period of time. (1 trip detection logic) | Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly Wire harness or connector Power management control ECU |
| DTC No. | Data List |
|---|---|
| P0A90-251 | Mtr-Temp (MG2) Max |
RELATED DATA LIST
The MG ECU monitors MG2. If the MG ECU detects a reduction in the magnetic force of MG2 or an inphase short, it interprets this as an MG2 failure. The power management control ECU (HV CPU) will illuminate the MIL and set a DTC.
For a description of MG2. Refer to DESCRIPTION.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A90 | 509 | Motor system malfunction If current does not flow as commanded, the motor high voltage system may be malfunctioning. DTCs are detected when the vehicle is stopped or being driven at low speeds. (1 trip detection logic) | Hybrid vehicle transaxle assembly Motor cable Inverter with converter assembly Wire harness or connector Power management control ECU |
Suspected malfunctioning parts
- Open circuit in the motor coil or motor cable
- Insecure connection of the motor cable connector
- Inverter with converter assembly output line malfunction
The MG ECU monitors motor circuit. If the MG ECU detects a malfunction of MG2, the power management control ECU will illuminate the MIL and set a DTC.
See also:
• COMPONENTS [12/2013 - ]