Diesel Data: Automotive Repair
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P0A7A-324








P311 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A7A-324: Generator Inverter Performance

DTC P0A7A-324 - Generator Inverter Performance

DESCRIPTION

The inverter converts high-voltage direct current from the HV battery and alternating current for MG2 and MG1. The inverter contains a three-phase bridge circuit, which consists of six power transistors each for MG2 and MG1, that converts direct current to three-phase alternating current. The MG ECU controls the actuation of the power transistors. The inverter transmits information that is necessary for effecting control, such as the amperage and voltage, to the MG ECU.





The MG ECU uses a 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 varies between 0 and 5 V in accordance with the changes in the high voltage. The higher the high voltage, the higher the output voltage, and the lower the high voltage, the lower the output voltage.
The MG ECU monitors the inverter voltage and detects malfunctions.

If the generator inverter circuit is opened or shorted, or if the circuit overheats, the information is transmitted from the inverter to the GFIV terminal of the MG ECU via the generator inverter fail signal line.






MONITOR DESCRIPTION

If the generator inverter detects a circuit malfunction, it will transmit a generator inverter fail signal to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting 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.
NOTICE: After inspection, be sure to replace the inverter with converter assembly.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:





HINT:
- *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic flowchart.
- Turning the power switch on (IG) with the service plug grip and inverter cover removed causes interlock switch system DTC P0A0D-350 to be output.
- P0A7A-324 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.

YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK AMOUNT OF GASOLINE P0A7A
NG -- REFUEL VEHICLE
OK -- Continue to next step.
3. CHECK ENGINE START P0A7A
OK -- CHECK QUANTITY OF HV COOLANT
NG -- Continue to next step.
4. INSPECT CRANKSHAFT PULLEY REVOLUTION (P POSITION) P0A7A
OK -- CHECK QUANTITY OF HV COOLANT
NG -- Continue to next step.
5. INSPECT CRANKSHAFT PULLEY REVOLUTION (N POSITION) P0A7A
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
NG -- REPAIR OR REPLACE ENGINE ASSEMBLY
6. CHECK QUANTITY OF HV COOLANT P0A93
C -- CHECK FOR COOLANT LEAKS AND ADD COOLANT
B -- ADD COOLANT
A -- Continue to next step.
7. CHECK COOLANT HOSE P0A93
NG -- CORRECT THE PROBLEM
OK -- Continue to next step.
8. CHECK FUSE (INV W/P FUSE) P0A93
NG -- REPLACE FUSE
OK -- Continue to next step.
9. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0343
NG -- CONNECT SECURELY
OK -- Continue to next step.
10. CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR & BRACKET ASSEMBLY CONNECTOR) P0A93
NG -- CONNECT SECURELY
OK -- Continue to next step.
11. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) P0A93
NG -- PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP)
OK -- Continue to next step.
12. CHECK CONNECTOR CONNECTION CONDITION (COOLING FAN MOTOR CONNECTOR) P0A93
NG -- CONNECT SECURELY
OK -- Continue to next step.
13. PERFORM ACTIVE TEST USING TECHSTREAM (DRIVING THE BATTERY COOLING FAN) P0A93
NG -- CHECK COOLING FAN SYSTEM
OK -- Continue to next step.
14. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0343
NG -- CONNECT SECURELY
OK -- Continue to next step.
15. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
16. CHECK GENERATOR RESOLVER P0A1A
NG -- CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
OK -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) P0A1B
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
18. CHECK MOTOR RESOLVER P0A1B
NG -- CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)
OK -- Continue to next step.
19. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A1B
NG -- TIGHTEN TO SPECIFIED TORQUE
OK -- Continue to next step.
20. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A1B
NG -- TIGHTEN TO SPECIFIED TORQUE
OK -- Continue to next step.
21. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) P0A1B
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- Continue to next step.
22. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) P0A1B
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY
23. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) P0A1A
NG -- CONNECT SECURELY
OK -- Continue to next step.
24. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
25. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) P0A1B
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
26. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) P0A1B
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY
27. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP) P0A93
OK -- ADD COOLANT
NG -- Continue to next step.
28. CHECK WATER PUMP WITH MOTOR & BRACKET ASSEMBLY P0A93
NG -- CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR POWER SOURCE CIRCUIT)
OK -- Continue to next step.
29. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR & BRACKET ASSEMBLY - HV CONTROL ECU) P0A93
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
30. CHECK ENGINE ROOM R/B P0A93
NG -- REPAIR OR REPLACE ENGINE ROOM R/B
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
31. CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR POWER SOURCE CIRCUIT) P0A93
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE WATER PUMP WITH MOTOR & BRACKET ASSEMBLY
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