P3125
DTC P3125 Converter & Inverter Assembly MalfunctionCIRCUIT DESCRIPTION
If driving the vehicle with the DCDC 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 DCDC 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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks the inverter voltage and detects malfunction.
Detecting Condition:
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU checks 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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
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:
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:
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:
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:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
The HV ECU detects faulty line connection inside the inverter.
Detecting Condition:
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:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION
Detecting Condition:
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:
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:
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:
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:
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE