P0A7A-809 - Generator Inverter Performance
HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0A7A-809,P0A7A-811: Generator Inverter Performance
P0A7A-811 - Generator Inverter Performance
DESCRIPTION
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 MG1 and MG2; it also converts three-phase alternating current supplied by MG1 and 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.
The MG ECU uses a voltage sensor, which is built into the inverter, to detect boosted high voltage (VH) 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 boosted voltage. The higher the boosted voltage, the higher the sensor output voltage, and the lower the boosted voltage, the lower the sensor output voltage.
The MG ECU monitors the inverter voltage and detects malfunctions.
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 generator inverter, the MG ECU detects it and sends a signal to inform the hybrid vehicle control ECU of the malfunction.
MONITOR DESCRIPTION
If the MG ECU detects that the generator inverter current exceeds the threshold level for a specified period of time, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
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.
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) Enter the following menus: 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 procedure.
- P0A7A-809 or P0A7A-811 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.
B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0343
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK GENERATOR RESOLVER P0A1A
NG -- CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK MOTOR RESOLVER P0A1A
NG -- CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)
OK -- Continue to next step.
7. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) P0A1B
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
8. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) P0A1B
C -- CONNECT SECURELY
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
9. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) P0A1B
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components
OK -- Continue to next step.
10. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) P0A1B
NG -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components
OK -- Continue to next step.
11. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) P0A1A
NG -- CONNECT SECURELY
OK -- Continue to next step.
12. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) P0A1A
NG -- CONNECT SECURELY
OK -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components
13. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) P0A1A
NG -- CONNECT SECURELY
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components
15. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) P0A1A
NG -- CONNECT SECURELY
OK -- Continue to next step.
16. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER) P0A1A
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Components