Toyota Corolla Cross: Inverter "A" Cooling System Performance (P0A9300)

DTC SUMMARY

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.

DESCRIPTION

Refer to the system description for the Cooling System.

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MONITOR DESCRIPTION

If the hybrid vehicle control ECU detects a malfunction of the inverter cooling system, the ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

CONFIRMATION DRIVING PATTERN

HINT:

• 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.

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• When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

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1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON and turn the GTS on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the ignition switch off and wait for 2 minutes or more.
5. Turn the ignition switch to ON and turn the GTS on.
6. With ignition switch ON and wait for 5 seconds or more. [*1]
7. Turn the ignition switch to ON (READY) and wait for 5 seconds or more. [*2]
8. Perform a road test according to the freeze frame data item "Vehicle Speed" for approximately 10 minutes. [*3]

   NOTICE:

   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).

   HINT:

   [*1] to [*3] : Normal judgment procedure.

   The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

9. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
10. Check the DTC judgment result.

    HINT:

    • 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.

WIRING DIAGRAM

Refer to the wiring diagram for Cooling System.

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CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

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NOTICE:

• After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

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• When disconnecting and reconnecting the auxiliary battery

  HINT:

  When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

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HINT:

• P0A9300 may be output as a result of the malfunction indicated by the DTCs in table below.
  1. The chart above is listed in inspection order of priority.
  2. 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.)

PROCEDURE

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B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

A

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HINT:

If the "Cooling System" inspection results are normal, perform the next step.

NEXT

REPLACE HV COOLANT

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