MALFUNCTION DESCRIPTION
This DTC indicates when the temperature sensor value inside the inverter has become abnormal. The cause of this malfunction may be one of the following:
Inverter internal circuit malfunction
Malfunction in ECU that controls the inverter
Malfunction in sensor for inverter control (coolant temperature sensor)
Coolant is leaking, coolant level is insufficient, coolant is frozen or coolant passage is clogged.
Grille is blocked.
Refer to the system description for the Cooling System.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P0A9300 | Inverter "A" Cooling System Performance | ·
Inverter coolant temperature increases as well as the temperature of any inverter with converter assembly related parts due to an inverter cooling system malfunction. ·
When the actual temperature of the inverter coolant is higher than the sensor value by a certain value or more and the actual temperature is high. (1 trip detection logic) |
·
Inverter cooling system ·
Inverter water pump assembly ·
Inverter with converter assembly ·
Cooling fan system ·
Wire harness or connector |
Comes on | Master Warning:
Comes on |
SAE Code:
P0A93 |
If the hybrid vehicle control ECU detects a malfunction of the inverter cooling system, the ECU will illuminate the MIL and store a DTC.
| Related DTCs | P0A93 (INF P0A9300): HV cooling system malfunction |
| Required sensors/components | Water pump, radiator fan, inverter, boost converter |
| Frequency of operation | Continuous |
| Duration | TMC's intellectual property |
| MIL operation | 1 driving cycle |
| Sequence of operation | None |
| The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
| Other conditions belong to TMC's intellectual property | - |
| TMC's intellectual property | - |
| Hybrid vehicle control ECU | DTC P0A93 (INF P0A9300) is not detected |
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the GTS on.
With ignition switch ON and wait for 5 seconds or more. [*1]
Turn the ignition switch to ON (READY) and wait for 5 seconds or more. [*2]
Perform a road test according to the freeze frame data item "Vehicle Speed" for approximately 10 minutes. [*3]
As the state of charge of the HV battery voltage may be low after driving in fail-safe mode, it will automatically be charged for 5 to 10 minutes after repairs have been performed and turn the ignition switch to ON (READY).
[*1] to [*3] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.
Refer to the wiring diagram for Cooling System.
Refer to the precautions before inspecting high voltage circuit.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
When disconnecting and reconnecting the auxiliary battery
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
P0A9300 may be output as a result of the malfunction indicated by the DTCs in table below.
The chart above is listed in inspection order of priority.
Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
| Malfunction Content | System | Relevant DTC | |
|---|---|---|---|
| Insulation malfunction | Hybrid Control System | P1C7C49 | Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure |
| P1C7D49 | Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure | ||
| P1C7E49 | Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure | ||
| P1C7F49 | Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure | ||
| P1C8049 | Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure | ||
| Malfunction Content | System | Relevant DTC | |
|---|---|---|---|
| Sensor and actuator circuit malfunction | Hybrid Control System | P0C7396 | Motor Electronics Coolant Pump "A" Component Internal Failure |
| P314A31 | Motor Electronics Coolant Pump "A" No Signal | ||
| Motor Generator Control System | P0A0011 | Motor Electronics Coolant Temperature Sensor Circuit Short to Ground | |
| P0A0015 | Motor Electronics Coolant Temperature Sensor Circuit Short to Battery or Open | ||
| Result | Proceed to |
|---|---|
| OK | A |
| NG (The connector is not connected securely.) | B |
| NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) | C |
A
B
C
If the "Cooling System" inspection results are normal, perform the next step.
| Proceed to |
|---|
| NEXT |
NEXT