HYBRID CONTROL SYSTEM, Diagnostic DTC:P0ADC-226

DTC Code DTC Name
P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High

DESCRIPTION

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

DTC No. INF Code DTC Detection Condition Trouble Area
P0ADC 226 Open or short to +B in the SMRB 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 or electric vehicle charger assembly, turn the power switch off. Also, 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 and electric vehicle charger 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 P0ADC-226 is stored, the vehicle cannot be started.

PROCEDURE


  1. READ VALUE USING GTS (SMRB STATUS)


    1. Connect the GTS to the DLh9.

    2. Turn the power switch on (IG).

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

    4. Read the Data List.

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

    5. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (SMRB VOLTAGE) Click here

    OK

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


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

      A00444GE01
      OK
      The connectors are connected securely and there are no contact pressure problems.
      Text in Illustration
      *A for LHD *B for RHD

    NG

    CONNECT SECURELY

    OK

  3. 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. 1 hybrid vehicle battery shield panel Click here.

    3. A0040RS

      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. 1 hybrid vehicle battery shield panel.


    NG

    CONNECT SECURELY

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  4. CHECK HARNESS AND CONNECTOR (SMRB VOLTAGE)


    1. Turn the power switch on (IG).

    2. A0044B1E49
      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 Condition Specified Condition
      L5-4 (SMRB) - 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

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


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

      A00444GE01
      OK
      The connectors are connected securely and there are no contact pressure problems.
      Text in Illustration
      *A for LHD *B for RHD

    NG

    CONNECT SECURELY

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    1. Disconnect the L5 power management control ECU connector.

    2. A00435PE99
      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 Condition Specified Condition
      L5-4 (SMRB) - Body ground Power switch off 30.6 to 37.4 Ω

    3. Reconnect the L5 power management control ECU connector.


    NG

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

    OK

  7. 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. A0040LAE01
      Text in Illustration
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 AM2 fuse
      *3 IGCT NO. 2 fuse

      Remove the IGCT NO. 2 and AM2 fuses from the engine room relay block and junction block assembly.

    3. Remove the No. 1 hybrid vehicle battery shield panel Click here.

    4. Disconnect the c9 hybrid battery junction block assembly connector.

    5. Disconnect the A20, A21, L5 and L6 power management control ECU connectors.

    6. A0043LLE75
      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 Condition Specified Condition
      L5-4 (SMRB) - A20-2 (+B2) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A21-5 (+B1) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - L5-1 (AM22) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - L6-7 (AM21) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A21-6 (MREL) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A21-1 (IG2) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - L6-1 (ACCD) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - L6-2 (IG1D) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A21-2 (IG2D) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - L5-14 (SPDI) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A20-16 (GI) Power switch off 10 kΩ or higher
      L5-4 (SMRB) - A20-4 (FCTL) Power switch off 10 kΩ or higher

    7. Reconnect the A20, A21, L5 and L6 power management control ECU connectors.

    8. Reconnect the c9 hybrid battery junction block assembly connector.

    9. Install the No. 1 hybrid vehicle battery shield panel.

    10. Install the IGCT NO. 2 and AM2 fuses.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  8. 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. 1 hybrid vehicle battery shield panel Click here.

    3. Disconnect the c9 hybrid battery junction block assembly connector.

    4. Disconnect the L5 power management control ECU connector.

    5. A00441FE05
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front 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
      L5-4 (SMRB) - c9-1 (SMRB) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      L5-4 (SMRB) and c9-1 (SMRB) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Reconnect the power management control ECU connector.

    7. Reconnect the hybrid battery junction block assembly connector.

    8. Install the No. 1 hybrid vehicle battery shield panel.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. 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. 1 hybrid vehicle battery shield panel Click here.

    3. Disconnect the c9 hybrid battery junction block assembly connector.

    4. A00437IE03
      Text in Illustration
      *a

      Front 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
      c9-2 (GND1) - Body ground Power switch off Below 1 Ω

    5. Reconnect the c9 hybrid battery junction block assembly connector.

    6. Install the No. 1 hybrid vehicle battery shield panel.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT 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 hybrid battery junction block assembly Click here.

    3. A0040E7E02
      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
      c9-1 (SMRB) - c9-2 (GND1) 20 °C (68 °F) 30.6 to 37.4 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