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HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE0-228

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

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

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CAUTION / NOTICE / HINT

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).

    Tip:

    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).

Tip:

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

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PROCEDURE


  1. Click here

    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 Condition Specified Condition
      SMRG Status Power switch on (IG) OFF

    5. Turn the power switch off.


  2. Click here

    CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A0005OEE01

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

      Table 1. Text in Illustration
      *A for LHD
      *B for RHD
      OK
      The connectors are connected securely and there are no contact pressure problems.

  3. Click here

    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 FOR INTERMITTENT PROBLEMS (Click here)

    • NG

      CONNECT SECURELY

  4. Click here

    CHECK HARNESS AND CONNECTOR (SMRG VOLTAGE)


    1. Turn the power switch on (IG).

    2. A0008LDE02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H1-2 (SMRG) - Body ground Power switch on (IG) Below 1 V
      Table 2. Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    3. Turn the power switch off.


  5. Click here

    CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A0005OEE01

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

      Table 3. Text in Illustration
      *A for LHD
      *B for RHD
      OK
      The connectors are connected securely and there are no contact pressure problems.

    • OK

      REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

    • NG

      CONNECT SECURELY

  6. Click here

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


    1. Disconnect the H1 power management control ECU connector.

    2. A0004UFE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-2 (SMRG) - Body ground Power switch off 25.0 to 59.0 Ω
      Table 4. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

    3. Reconnect the H1 power management control ECU connector.


  7. Click here

    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. A0005E3E06

      Remove the PM IGCT fuse from the No. 2 engine room relay block.

      Table 5. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 PM IGCT Fuse
    3. A0004BTE02

      Remove the AM2 fuse and ECU-IG2 NO. 3 fuse from the engine room relay block and junction block assembly.

      Table 6. Text in Illustration
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 AM2 Fuse
      *3 ECU-IG2 NO. 3 Fuse

    4. Remove the No. 4 hybrid battery shield panel (Click here).

    5. A000575E03

      Disconnect the Q6 hybrid battery junction block assembly connector.

    6. Disconnect the A31, A33, H1 and H2 power management control ECU connectors.

    7. A0003L0E02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-2 (SMRG) - A31-2 (+B2) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - A33-5 (+B1) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - H1-1 (AM22) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - H2-7 (AM21) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - A33-6 (MREL) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - A33-1 (IG2) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - H2-1 (ACCD) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - H2-2 (IG1D) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - A33-2 (IG2D) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - H1-14 (SPDI) Power switch off 10 kΩ or higher
      H1-2 (SMRG) - A31-16 (GI) Power switch off 10 kΩ or higher
      Table 7. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

    8. Reconnect the A31, A33, H1 and H2 power management control ECU connectors.

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

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

    11. Install the PM IGCT fuse, AM2 fuse and ECU-IG2 NO. 3 fuse.


    • OK

      REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    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

      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
      Table 8. 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)

    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.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    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

      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
      Table 9. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Battery Junction Block Assembly)

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

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


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    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. A0007QIE03

      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
      Table 10. Text in Illustration
      *a

      Component without harness connected

      (Hybrid Battery Junction Block Assembly)

    4. Install the hybrid battery junction block assembly.


    • OK

      CHECK FOR INTERMITTENT PROBLEMS (Click here)

    • NG

      REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (Click here)