HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AA7-727

DTC Code DTC Name
P0AA7-727 Hybrid Battery Voltage Isolation Sensor Circuit

DESCRIPTION

The power management control ECU monitors the insulation monitoring circuit located in the battery smart unit and detects a malfunction.

DTC No. INF Code DTC Detection Condition Trouble Area
P0AA7 727 Malfunction in the insulation monitoring circuit in the battery smart unit Battery smart unit

PROCEDURE


  1. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Clear DTCs and freeze frame data.

    5. Turn the power switch off.


    NEXT

  2. SIMULATION TEST


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG) and wait for 1 minute or more.

      Note

      Do not turn the power switch off until step 3 is complete.

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      P0AA7-727 is not output A
      P0AA7-727 is output B

    B

    REPLACE BATTERY SMART UNIT Click here

    A

  3. SIMULATION TEST

    Note

    Do not turn the power switch off while performing this inspection.


    1. With the vehicle and engine stopped, turn the power switch on (READY) with park (P) selected and wait for 1 second or more. (If the engine starts, wait until the engine stops.)

    2. While depressing the brake pedal without depressing the accelerator pedal, move the shift lever to D and wait for 1 minute. (Step A)

    3. Drive the vehicle 50 cm (1.6 ft.) forward and perform step A.

    4. Drive the vehicle another 50 cm (1.6 ft.) forward and perform step A. Repeat this procedure 5 times (minimum total driving distance: 2 m (6.6 ft.)).

    5. Enter the following menus: Powertrain / Hybrid Control / DTC.

    6. Check if DTCs are output.

      Result
      Result Proceed to
      P0AA6 is not output A
      P0AA6 is output B

    A

    REPLACE BATTERY SMART UNIT Click here

    B

    GO TO DTC CHART (P0AA6) Click here