HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AA4-232

DTC Code DTC Name
P0AA4-232 Hybrid Battery Negative Contactor Circuit Stuck Closed

DESCRIPTION

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

DTC No. INF Code DTC Detection Condition Trouble Area
P0AA4 232 SMRG on the HV battery negative side stuck closed

  • Hybrid battery junction block assembly

  • Inverter with converter assembly

  • Power management control ECU

  • Wire harness or connector

WIRING DIAGRAM

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

CAUTION / NOTICE / HINT

CAUTION:


  • When performing P0AA4-232 troubleshooting, use either a tool wrapped with vinyl insulation tape or an insulated tool. (It is extremely dangerous when a high-voltage charge passes through a non-insulated tool causing a short.)

  • 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 removing 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 Click here.

    Tech Tips

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

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

  • If the DTCs are cleared or the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal before performing repairs, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY).

Tech Tips

If P0AA4-232 is stored, the hybrid control system cannot be turned on.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.

      Result
      Result Proceed to
      P0AA4-232 only is output, or DTCs except the ones in the tables below are also output. A
      Any of the following DTCs including pending DTCs in table 1 below are also output. B
      Any of the following DTCs in table 2 below are also output. C
      Table 1
      DTC No. Relevant Diagnosis
      P0A1A-151, 155, 156, 200, 658, 659, 791, 792, 793 Generator Control Module
      P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796 Drive Motor "A" Control Module
      P0A1D-148 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range/Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      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
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0AE6-225 Hybrid Battery Precharge Contactor Control Circuit Low
      P0AE7-224 Hybrid Battery Precharge Contactor Control Circuit High
      P0AFC-129 Hybrid Battery Pack Sensor Module
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P2511-149 ECM/PCM Power Relay Sensor Circuit Intermittent
      P3004-132 High Voltage Power Resource
      P324E-788 MG-ECU Power Relay Intermittent Circuit
      U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      Table 2
      DTC No. Relevant Diagnosis
      P0AFC-123 Hybrid Battery Pack Sensor Module
      P0B3D-123 Hybrid Battery Voltage Sensor "A" Circuit Low
      P0B42-123 Hybrid Battery Voltage Sensor "B" Circuit Low
      P0B47-123 Hybrid Battery Voltage Sensor "C" Circuit Low
      P0B4C-123 Hybrid Battery Voltage Sensor "D" Circuit Low
      P0B51-123 Hybrid Battery Voltage Sensor "E" Circuit Low
      P0B56-123 Hybrid Battery Voltage Sensor "F" Circuit Low
      P0B5B-123 Hybrid Battery Voltage Sensor "G" Circuit Low
      P0B60-123 Hybrid Battery Voltage Sensor "H" Circuit Low
      P0B65-123 Hybrid Battery Voltage Sensor "I" Circuit Low
      P0B6A-123 Hybrid Battery Voltage Sensor "J" Circuit Low
      P0B6F-123 Hybrid Battery Voltage Sensor "K" Circuit Low
      P0B74-123 Hybrid Battery Voltage Sensor "L" Circuit Low
      P0B79-123 Hybrid Battery Voltage Sensor "M" Circuit Low
      P0B7E-123 Hybrid Battery Voltage Sensor "N" Circuit Low
      P0B83-123 Hybrid Battery Voltage Sensor "O" Circuit Low
      P0B88-123 Hybrid Battery Voltage Sensor "P" Circuit Low
      P0B8D-123 Hybrid Battery Voltage Sensor "Q" Circuit Low
      P0B92-123 Hybrid Battery Voltage Sensor "R" Circuit Low
      P308A-123 Hybrid Battery Voltage Sensor All Circuits Low

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0AA4-232 may be stored due to a malfunction which causes the DTCs in the preceding tables to be stored. In this case, first troubleshoot the output DTCs in the preceding tables. Then, perform a reproduction test to check that no DTCs are output.

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here

    A

  2. CHECK FREEZE FRAME DATA (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Read the freeze frame data of DTC P0AA4-232.

      Result
      Result Proceed to
      Batt Pack Current Val is 3 A or more. A
      Batt Pack Current Val is less than 3 A. B

    5. Turn the power switch off.


    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

  3. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A0005OEE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    OK

    CHECK CONNECTOR CONNECTION CONDITION (NO. 2 FLOOR WIRE CONNECTOR) Click here

    NG

  4. CONNECT SECURELY


    NEXT

  5. CHECK CONNECTOR CONNECTION CONDITION (NO. 2 FLOOR WIRE CONNECTOR)


    1. Check the connector connections and contact pressure of the relevant terminals for the HQ4 floor wire connector Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    OK

    CHECK CONNECTOR CONNECTION CONDITION (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY CONNECTOR) Click here

    NG

  6. CONNECT SECURELY


    NEXT

  7. CHECK CONNECTOR CONNECTION CONDITION (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      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.

    2. Remove the No. 4 hybrid battery shield panel Click here.

    3. A00052Y

      Check the connector connections and contact pressure of the relevant terminals for the hybrid battery junction block assembly connector Click here.

      OK
      The connector is connected securely and there are no contact pressure problems.

    4. Install the No. 4 hybrid battery shield panel.


    OK

    CHECK GROUND WIRE CONNECTION CONDITION (SMR ACTIVATION LOW-VOLTAGE CIRCUIT) Click here

    NG

  8. CONNECT SECURELY


    NEXT

  9. CHECK GROUND WIRE CONNECTION CONDITION (SMR ACTIVATION LOW-VOLTAGE CIRCUIT)


    1. Check the installation condition of the ground wires H2, H3, H4 and Q1.

      OK
      The ground wires H2, H3, H4 and Q1 are securely installed.

    OK

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY) Click here

    NG

  10. CONNECT SECURELY


    NEXT

  11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      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.

    2. Remove the No. 4 hybrid battery shield panel Click here.

    3. Disconnect the Q6 hybrid battery junction block assembly connector.

    4. Disconnect the H1 power management control ECU connector.

    5. A0008RYE04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Rear view of wire harness connector

      (to Hybrid Battery Junction Block Assembly)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H1-2 (SMRG) - Q6-3 (SMRG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      H1-2 (SMRG) and Q6-3 (SMRG) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Reconnect the H1 power management control ECU connector.

    7. Reconnect the Q6 hybrid battery junction block assembly connector.

    8. Install the No. 4 hybrid battery shield panel.


    OK

    CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BODY GROUND) Click here

    NG

  12. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

  13. CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BODY GROUND)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      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.

    2. Remove the No. 4 hybrid battery shield panel Click here.

    3. Disconnect the Q6 hybrid battery junction block assembly connector.

    4. A000946E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Battery Junction Block Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q6-2 (GND) - Body ground Power switch off Below 1 Ω

    5. Reconnect the Q6 hybrid battery junction block assembly connector.

    6. Install the No. 4 hybrid battery shield panel.


    OK

    INSPECT HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (SMRG) Click here

    NG

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

  15. INSPECT HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (SMRG)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      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.

    2. Remove the No. 4 hybrid battery shield panel Click here.

    3. Disconnect the Q6 hybrid battery junction block assembly connector.

    4. A0007QIE03
      Text in Illustration
      *a

      Component without harness connected

      (Hybrid Battery Junction Block Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q6-3 (SMRG) - Q6-2 (GND) -40 to 80 °C (-40 to 176°F) 25.0 to 59.0 Ω

    5. Reconnect the Q6 hybrid battery junction block assembly connector.

    6. Install the No. 4 hybrid battery shield panel.


    OK

    CHECK HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (SMRG) Click here

    NG

  16. REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY

    Click here


    NEXT

    CHECK POWER MANAGEMENT CONTROL ECU (CHECK FOR NORMAL OPERATION) Click here

  17. CHECK HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (SMRG)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      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.

    2. Remove the No. 1 hybrid battery shield sub-assembly Click here.

    3. A00062HE03

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S3-1 (CEI) - f1-1 (-) Power switch off 10 kΩ or higher

      Tech Tips


      • If a system main relay is stuck closed, inspect the hybrid battery junction block assembly without removing it from the vehicle, in order to keep the relay closed.

      • If the result of reading the freeze frame data is A, the hybrid battery junction block assembly must be replaced. Measuring resistance can determine that this is either a present or past malfunction.

    4. Install the No. 1 hybrid battery shield sub-assembly.


    NEXT

  18. REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY

    Click here


    NEXT

  19. CHECK POWER MANAGEMENT CONTROL ECU (CHECK FOR NORMAL OPERATION)


    1. Install the service plug grip.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Clear the DTCs Click here.

    5. Turn the power switch off and wait for 30 seconds or more.

    6. Turn the power switch on (READY).

    7. Enter the following menus: Powertrain / Hybrid Control / Data List / Power Resource VB, VL-Voltage before Boosting.

    8. According to the display on the GTS, read the Data List and monitor the values of "Power Resource VB" and "VL-Voltage before Boosting" for 3 minutes.

      Result
      Result Proceed to
      Difference between "Power Resource VB" and "VL-Voltage before Boosting" is always less than 100 V. A
      Difference between "Power Resource VB" and "VL-Voltage before Boosting" is 100 V or more. B

    9. Turn the power switch off.


    A

    END

    B

    REPLACE POWER MANAGEMENT CONTROL ECU AND HYBRID BATTERY JUNCTION BLOCK ASSEMBLY