P3125
DTC P3125 CONVERTER & INVERTER ASSEMBLY MALFUNCTIONCIRCUIT DESCRIPTION
If driving the vehicle with the DC-DC converter malfunctioning, the voltage of the auxiliary battery will drop, which will make it impossible to keep driving the vehicle. Therefore, HV ECU checks the operation of the DC-DC converter and gives warning to the driver if malfunction is detected.
HINT:
- When using an OBD II scan tool other than TOYOTA hand-held tester, check all the steps.
- When using TOYOTA hand-held tester, confirm the information code and check it.
Detecting Condition:
DTC P3125 - Information code 263, 264, 265
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks the inverter voltage and detects malfunction.
Detecting Condition:
DTC P3125 - Information code 266, 267, 268, 269, 270
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
DTC P3125 - Information code 272
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
DTC P3125 - Information code 273
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks the inverter temperature and controls the load limitation in order to prevent the inverter from overheating. Also, it detects the abnormality of the line connection of the inverter temperature sensor and the malfunction of the sensor itself.
Detecting Condition:
DTC P3125 - Information code 274, 275, 276, 277
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU check the line connection of the motor inverter stop signal circuit and enters the fail safe mode (limited output driving) if malfunction is detected.
Detecting Condition:
DTC P3125 - Information code 278, 280
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
DTC P3125 - Information code 279,281,282
INSPECTION PROCEDURE
If the information code 279 or 281 is output, check if other DTC or information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 279 or 281 alone is recorded, replace the converter & inverter assembly.
If the information code 282 is output, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the motor inverter fail signal circuit and detects malfunction.
Detecting Condition:
DTC P3125 - Information code 283, 285
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
DTC P3125 - Information code 284, 286, 287
INSPECTION PROCEDURE
If the information code 284 or 287 is output, check if other DTC or information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 284 or 287 alone is recorded, replace the converter & inverter assembly.
If the information code 286 is output, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the motor inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 288, 289, 290, 292, 294, 296, 297, 298, 300, 302
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the motor inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 291, 293, 295, 299, 301, 303
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the motor inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 306, 307
INSPECTION PROCEDURE
If the information code 306 or 307 is output, check if other DTC or information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 306 or 307 alone is recorded, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
If the HV ECU detects the collision signal from the airbag or inverter, the HV ECU recognizes it as the destruction of the vehicle and then shuts down the high voltage system to ensure safety.
Detecting Condition:
DTC P3125 Information code 308
HINT: When the vehicle collision occurs and the airbag is deployed, this information code will be recorded and the high voltage system will be shut down.
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the motor gate shutdown signal circuit and detects malfunction.
Detecting Condition:
DTC P3125 - Information code 304, 305
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
DTC P3125 - Information code 309
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
DTC P3125 - Information code 311
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks the generator temperature and controls the load limitation in order to prevent the generator from overheating. Also, it detects the abnormality of the line connection of the generator temperature sensor and the malfunction of the sensor itself.
Detecting Condition:
DTC P3125 - Information code 312, 313, 314, 315
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the generator inverter stop signal circuit and enters the tail safe mode (limited driving) if malfunction is detected.
Detecting Condition:
DTC P3125 - Information code 316, 318
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
DTC P3125 - Information code 317, 319, 320
INSPECTION PROCEDURE
If the information code 317 or 319 is output, check if other information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 317 or 319 alone is recorded, replace the converter & inverter assembly. If the information code 320 is output, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the generator inverter fail signal circuit and detects malfunction.
Detecting Condition:
DTC P3125 - Information code 321 323
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
DTC P3125 - Information code 322, 324, 325
INSPECTION PROCEDURE
If the information code 322 or 325 is output, check if other information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 322 or 325 alone is recorded, replace the converter & inverter assembly.
If the information code 324 is output, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the generator inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 326, 327, 328, 330, 332, 334, 335, 336, 338, 340
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the generator inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 329, 331, 333, 337, 339, 341
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects the malfunction of the generator inverter current sensor. It detects the malfunction of the sensor system, not of the high voltage system.
Detecting Condition:
DTC P3125 - Information code 344, 345
INSPECTION PROCEDURE
If the information code 344 or 345 is output, check if other DTC or information codes are recorded. If they are recorded, check and repair those codes first.
If the information code 344 or 345 alone is recorded, replace the converter & inverter assembly.
CIRCUIT DESCRIPTION
The HV ECU checks the line connection of the generator gate shutdown signal circuit and detects malfunction.
Detecting Condition:
DTC P3125 - Information code 342, 343
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE