HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AA1-231

DTC Code DTC Name
P0AA1-231 Hybrid Battery Positive Contactor Circuit Stuck Closed

DESCRIPTION

Refer to the description for DTC P0AE6-225 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0AA1 231 SMRB on the HV battery positive side is stuck closed.

  • junction block

  • Inverter with converter assembly

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AE6-225 Click here.

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.

Tech Tips


  • Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

  • If P0AA1-231 is stored, the hybrid system cannot be turned on.

PROCEDURE


  1. CHECK DTC OUTPUT (HV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      P0AA1-231 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0A1A-151, 155, 156, 200, 201, 658, 659, 791, 792, 793 Generator Control Module
      P0A1B-163, 164, 168, 192, 193, 511, 512, 661, 794, 795, 796, 786, 788 Drive Motor "A" Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range / Performance
      P0A4B-253 Generator Position Sensor Circuit
      P0A4C-513 Generator Position Sensor Circuit Range / Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A78-266, 267, 586 Drive Motor "A" Inverter Performance
      P0A94-442 DC / DC Converter Performance
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0AE2-161, 773 Hybrid Battery Precharge Contactor Circuit Stuck Closed
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P3004-132 Power Cable Malfunction
      P3240-443 DC / DC Converter Control Circuit

    B

    GO TO DTC CHART Click here

    A

  2. CHECK FREEZE FRAME DATA


    1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    2. Read the freeze frame data of DTC P0AA1-231.

      Result
      Result Proceed to
      Post-boost voltage (VL) is 60 V or more. A
      Pre-boost voltage (VL) is less than 60 V.

      B

      (for LHD)

      C

      (for RHD)

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

  3. CHECK HV BATTERY JUNCTION BLOCK

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. A01H20UE01

      Remove the service plug grip. Click here

      Note

      After removing the service plug grip, do not turn the power switch on (READY) unless instructed by the repair manual because this may cause a malfunction.

      Tech Tips

      For the removal and installation procedures related to inspection of the junction block, Click here.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      g2-1 - z30-1 Power switch off 10 kΩ or higher

      Tech Tips


      • If a system main relay is stuck closed, impacts or vibrations during the inspection may cause it to open.

      • If the result of reading the freeze frame data in the previous step was B, the junction block must be replaced. Measuring resistance can determine whether this is either a present or past malfunction.


    NG

    REPLACE HV BATTERY JUNCTION BLOCK Click here

    OK

    REPLACE HV BATTERY JUNCTION BLOCK Click here