HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE0-228

DTC Code DTC Name
P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High

DESCRIPTION

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

DTC No. INF Code DTC Detection Condition Trouble Area
P0AE0 228 Open or +B short in SMRG circuit

  • Wire harness or connector

  • Hybrid battery junction block assembly

  • Power management control ECU

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 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.

Tech Tips

If P0AE0-228 is stored, the vehicle cannot be started.

PROCEDURE


  1. READ VALUE USING GTS (SMRG STATUS)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / SMRG Status.

    4. Read the Data List.

      OK
      Tester Display Switch Condition Specified Condition
      SMRG Status Power switch on (IG) OFF

    5. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (SMRG VOLTAGE) Click here

    OK

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


    1. A01FQC6E01
      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.

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (NO. 2 HYBRID BATTERY PACK WIRE 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 front luggage compartment trim cover Click here.

    3. A01FQ7K

      Check the connector connections and contact pressure of the relevant terminals for the No. 2 hybrid battery pack wire connector Click here.

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

    4. Install the front luggage compartment trim cover.


    NG

    CONNECT SECURELY

    OK

  4. 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 upper hybrid battery cover sub-assembly Click here.

    3. A01FRCO

      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 upper hybrid battery cover sub-assembly.


    NG

    CONNECT SECURELY

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  5. CHECK HARNESS AND CONNECTOR (SMRG VOLTAGE)


    1. Turn the power switch on (IG).

    2. A01FRDGE43
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N91-2 (SMRG) - Body ground Power switch on (IG) Below 1 V

    3. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Click here

    OK

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


    1. A01FQC6E01
      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.

    NG

    CONNECT SECURELY

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. Disconnect the connector from the power management control ECU.

    2. A01FQZ9E97
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N91-2 (SMRG) - Body ground Power switch off 25.0 to 59.0 Ω

    3. Connect the power management control ECU connector.


    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - POWER MANAGEMENT CONTROL ECU) Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (SHORT TO POWER SUPPLY WIRES)

    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. A01FUV9E02
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 IGCT No. 5 Fuse

      Remove the IGCT No. 5 fuse from the No. 1 engine room relay block and junction block assembly.

    3. for LHD:


      1. A01FRA7E01
        Text in Illustration
        *1 Cowl Side Junction Block LH
        *2 LH-IG2 Fuse

        Remove the LH-IG2 fuse from the cowl side junction block LH.

      2. A01FSLDE01
        Text in Illustration
        *1 Cowl Side Junction Block RH
        *2 AM2 Fuse

        Remove the AM2 fuse from the cowl side junction block RH.

    4. for RHD:


      1. A01FRGIE02
        Text in Illustration
        *1 Cowl Side Junction Block LH
        *2 LH-IG2 Fuse
        *3 AM2 Fuse

        Remove the LH-IG2 fuse and AM2 fuse from the cowl side junction block LH.

    5. Remove the upper hybrid battery cover sub-assembly Click here.

    6. A01FRCO

      Disconnect the connector from the hybrid battery junction block assembly.

    7. Disconnect all the connectors from the power management control ECU.

    8. A01FTWRE13
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N91-2 (SMRG) - A35-1 (+B2) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A36-3 (+B1) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - N91-1 (AM22) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - N92-7 (AM21) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A35-4 (MREL) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A36-1 (IG2) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - N92-1 (ACCD) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A35-10 (ACCI) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - N92-2 (IG1D) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A36-2 (IG2D) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - N91-16 (SPDI) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A35-19 (GI) Power switch off 10 kΩ or higher
      N91-2 (SMRG) - A35-5 (FCTL) Power switch off 10 kΩ or higher

    9. Connect the power management control ECU connectors.

    10. Connect the hybrid battery junction block assembly connector.

    11. Install the upper hybrid battery cover sub-assembly.

    12. Install the LH-IG2 fuse, AM2 fuse and IGCT No. 5 fuse.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  9. CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - POWER MANAGEMENT CONTROL ECU)

    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 front luggage compartment trim cover Click here.

    3. Disconnect the No. 2 hybrid battery pack wire connector.

    4. Disconnect the connector from the power management control ECU.

    5. A01FS7CE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Hybrid Battery Pack Wire Connector)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      Tm1-6 (SMRG) - N91-2 (SMRG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      Tm1-6 (SMRG) and N91-2 (SMRG) - Other terminals Power switch off 10 kΩ or higher

    6. Connect the power management control ECU connector.

    7. Connect the No. 2 hybrid battery pack wire connector.

    8. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (NO. 2 HYBRID BATTERY PACK WIRE CONNECTOR - 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 front luggage compartment trim cover Click here.

    3. Disconnect the No. 2 hybrid battery pack wire connector.

    4. Remove the upper hybrid battery cover sub-assembly Click here.

    5. Disconnect the connector from the hybrid battery junction block assembly.

    6. A01FTD4E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Hybrid Battery Pack Wire Connector)
      *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 Switch Condition Specified Condition
      Tm1-6 (SMRG) - m3-1 (SMRG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      Tm1-6 (SMRG) and m3-1 (SMRG) - Other terminals Power switch off 10 kΩ or higher

    7. Connect the hybrid battery junction block assembly connector.

    8. Install the upper hybrid battery cover sub-assembly.

    9. Connect the No. 2 hybrid battery pack wire connector.

    10. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. 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 upper hybrid battery cover sub-assembly Click here.

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

    4. A01FR3HE19
      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 Switch Condition Specified Condition
      m3-2 (GND) - Body ground Power switch off Below 1 Ω

    5. Connect the hybrid battery junction block assembly connector.

    6. Install the upper hybrid battery cover sub-assembly.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. 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 hybrid battery junction block assembly Click here.

    3. A01FS16E44
      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
      m3-1 (SMRG) - m3-2 (GND) -40 to 80°C (-40 to 176°F) 18.4 to 36.3 Ω

    4. Install the hybrid battery junction block assembly.


    NG

    REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here