HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AE6-225

DTC Code DTC Name
P0AE6-225 Hybrid Battery Precharge Contactor Control Circuit Low

DESCRIPTION

The SMRs (System Main Relays) are the relays that connect or disconnect the high-voltage power system in accordance with commands from the hybrid vehicle control ECU.

The SMR system is composed of three SMRs and one system main resistor. SMRB and SMRG are located on the HV battery junction block in the HV battery pack. SMRP and the system main resistor are located in the hybrid vehicle converter (DC/DC converter) assembly in the HV battery pack.

To connect to the high-voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. To shut off the high-voltage power system, SMRB and SMRG are turned off.

When there is an open in the AMD line or IGCT line, the following DTCs are output:

Trouble Area Malfunction DTC Occurrence Condition
Open in AMD line DC/DC converter malfunction P0A08-264 May not occur
Open in VLO, short to GND P0A09-591 May not occur
IDH frequency error P2519-766 Occurs
Open in SMRP, short to GND P0AE6-225 Occurs
Open in DCIM, short to GND P1507-207 Occurs
Open in IGCT line Open in NODD, short to GND P0A09-265 Occurs
Open in VLO, short to GND P0A09-591 Occurs
IDH frequency error P2519-766 Occurs
Open in SMRP, short to GND P0AE6-225 Occurs
Open in DCIM, short to GND P1507-207 Occurs

P0AE6-225 is output first because the time required for diagnosis is the shortest.

DTC NO. INF Code DTC Detection Condition Trouble Area
P0AE6 225 Open or short to GND in the SMRP circuit

  • Wire harness or connector

  • Frame wire

  • Hybrid vehicle converter

  • Hybrid vehicle control ECU

  • Fuse

  • Fusible link block assembly

WIRING DIAGRAM

A01H1UAE02
A01GY7IE08

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.

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.

    5. Refer to "Proceed to" in the table below to perform each inspection.

      Result
      Item to inspect P0A08-264 P0A09-265 P0A09-591 P2519-766 P0AE6-225 P1507-207 Proceed to
      AMD and IGC2 open circuit and SMRP system inspections - - - - ○ - A
      Only AMD open circuit inspection ○ - ○ ○ ○ ○ B
      ○ - - ○ ○ ○
      ○ - - - ○ ○
      Only IGC2 open circuit inspection - ○ ○ ○ ○ ○ C
      - ○ - - ○ ○
      - ○ - ○ ○ ○
      AMD and IGC2 open circuit inspections - - ○ ○ ○ ○ D
      - - - ○ ○ ○

      Tech Tips


      • ○ : DTCs that are output

      • - : DTCs that are not output


    B

    CHECK HV CONVERTER (AMD TERMINAL CONNECTION CONDITION) Click here

    C

    CHECK FUSE Click here

    D

    CHECK FUSIBLE LINK AND FUSE Click here

    A

  2. CHECK FUSIBLE LINK AND FUSE


    1. A01GW45E01

      Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block, and the fusible link (MAIN) that is installed at the auxiliary battery, for improper installation and for an open circuit.

      OK
      The fuse and fusible link are installed securely. There are no open circuits in the fusible link or fuse.

    NG

    REPLACE FUSIBLE LINK AND FUSE

    OK

  3. CHECK FUSE (IGCT3 FUSE)


    1. A01GZIOE01

      Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.

      OK
      The fuse is installed securely. There is no open circuit in the fuse.

    NG

    REPLACE FUSE (IGCT3 FUSE)

    OK

  4. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. Check the connections of the hybrid vehicle control ECU connectors.

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

    NG

    CONNECT SECURELY

    OK

  5. CHECK HV CONVERTER (AMD TERMINAL CONNECTION CONDITION)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. 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.

    3. A01H29R

      Check the connection of the AMD terminal (hybrid vehicle converter side).

      OK
      The terminal is connected securely and there is no contact problem.

    4. Check for arc marks on the AMD terminals (hybrid vehicle converter side and vehicle wire harness side).

      Result
      Result Proceed to
      The terminals are connected securely and there are no contact problems. There are no arc marks. A
      The terminals are not connected securely and there is a contact problem. There are arc marks. B
      The terminals are not connected securely and there is a contact problem. There are no arc marks. C
      The terminals are connected securely and there are no contact problems. There are arc marks. B

    B

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    C

    CONNECT SECURELY

    A

  6. CHECK TERMINAL VOLTAGE (AMD TERMINAL)


    1. A01H29R

      Turn the power switch off.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      AMD terminal - Body ground Power switch off 11 to 14 V

    NG

    CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE)


    1. Disconnect the No. 2 battery pack wire connector.

    2. A01H29WE02

      Turn the power switch on (IG).

    3. A01GXOME10

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU)


    1. Turn the power switch off.

    2. A01GXOME09

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      nS1-11 (SMRP) - Body ground Power switch off 370 to 430 kΩ

    NG

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

    OK

  9. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXEHE11

      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. Disconnect the low voltage connector from the hybrid vehicle converter.

      Tech Tips

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Click here.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - z82-4 (IGCT) Power switch off Below 1 Ω
      nS1-11 (SMRP) - z82-10 (SMRP) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) or z82-4 (IGCT) - Body ground Power switch off 10 kΩ or higher
      nS1-11 (SMRP) or z82-10 (SMRP) - Body ground Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HV CONVERTER


    1. A01GXF3E04
      A01H1B6E02

      Connect all the disconnected connectors.

    2. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      nS1-11 (SMRP) - zR3-8 (GND) Power switch on (IG) 9 to 12 V

      Tech Tips

      Perform this inspection with the battery pack wire connectors connected.


    NG

    REPLACE HV CONVERTER Click here

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 2 BATTERY PACK WIRE CONNECTOR)


    1. Turn the power switch off.

    2. A01H0VYE10

      Disconnect connector A76 from the hybrid vehicle control ECU.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A76-25 (SMRP) - nS1-11 (SMRP) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A76-25 (SMRP) or nS1-11 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  12. CHECK HV CONVERTER (AMD TERMINAL CONNECTION CONDITION)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. 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.

    3. A01H29R

      Check the connection of the AMD terminal (hybrid vehicle converter side).

      OK
      The terminal is connected securely and there is no contact problem.

    4. Check for arc marks on the AMD terminals (hybrid vehicle converter side and vehicle wire harness side).

      Result
      Result Proceed to
      The terminals are connected securely and there are no contact problems. There are no arc marks. A
      The terminals are not connected securely and there is a contact problem. There are arc marks. B
      The terminals are not connected securely and there is a contact problem. There are no arc marks. C
      The terminals are connected securely and there are no contact problems. There are arc marks. B

    B

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    C

    CONNECT SECURELY

    A

  13. CHECK TERMINAL VOLTAGE (AMD TERMINAL)


    1. A01H29R

      Turn the power switch off.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      AMD terminal - Body ground Power switch off 11 to 14 V

    NG

    CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL) Click here

    OK

    REPLACE HV CONVERTER Click here

  14. CHECK FUSE


    1. A01GW45E01

      Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block for improper installation and for an open circuit.

      OK
      The fuse is installed securely. There is no open circuit in the fuse.

    NG

    REPLACE FUSE (IGCT2 NO. 2 FUSE)

    OK

  15. CHECK FUSE (IGCT3 FUSE)


    1. A01GZIOE01

      Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.

      OK
      The fuse is installed securely. There is no open circuit in the fuse.

    NG

    REPLACE FUSE (IGCT3 FUSE)

    OK

  16. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE)


    1. Disconnect the No. 2 battery pack wire connector Click here.

    2. A01H29WE02

      Turn the power switch on (IG).

    3. A01GXOME10

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXEHE12

      Turn the power switch off.

    2. Remove the service plug grip Click here.

    3. Disconnect the low voltage connector from the hybrid vehicle converter.

      Tech Tips

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Click here.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - z82-4 (IGCT) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) or z82-4 (IGCT) - Body ground Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HV CONVERTER Click here

  18. CHECK FUSIBLE LINK AND FUSE


    1. A01GW45E01

      Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block, and the fusible link (MAIN) that is installed at the auxiliary battery, for improper installation and for an open circuit.

      OK
      The fuse and fusible link are installed securely. There are no open circuits in the fusible link or fuse.

    NG

    REPLACE FUSIBLE LINK AND FUSE

    OK

  19. CHECK FUSE (IGCT3 FUSE)


    1. A01GZIOE01

      Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.

      OK
      The fuse is installed securely. There is no open circuit in the fuse.

    NG

    REPLACE FUSE (IGCT3 FUSE)

    OK

  20. CHECK HV CONVERTER (AMD TERMINAL CONNECTION CONDITION)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Turn the power switch off.

    2. 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.

    3. A01H29R

      Check the connection of the AMD terminal (hybrid vehicle converter side).

      OK
      The terminal is connected securely and there is no contact problem.

    4. Check for arc marks on the AMD terminals (hybrid vehicle converter side and vehicle wire harness side).

      Result
      Result Proceed to
      The terminals are connected securely and there are no contact problems. There are no arc marks. A
      The terminals are not connected securely and there is a contact problem. There are arc marks. B
      The terminals are not connected securely and there is a contact problem. There are no arc marks. C
      The terminals are connected securely and there are no contact problems. There are arc marks. B

    B

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    C

    CONNECT SECURELY

    A

  21. CHECK TERMINAL VOLTAGE (AMD TERMINAL)


    1. A01H29R

      Turn the power switch off.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      AMD terminal - Body ground Power switch off 11 to 14 V

    NG

    CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL) Click here

    OK

  22. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE)


    1. Disconnect the No. 2 battery pack wire connector.

    2. A01H29WE02

      Turn the power switch on (IG).

    3. A01GXOME10

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  23. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXEHE12

      Check that the service plug grip is not installed.

    2. Disconnect the low voltage connector from the hybrid vehicle converter.

      Tech Tips

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter, Click here.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) - z82-4 (IGCT) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      nS1-10 (IGCT) or z82-4 (IGCT) - Body ground Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HV CONVERTER Click here

  24. CHECK AUXILIARY BATTERY (NEGATIVE TERMINAL)


    1. Turn the power switch off.

    2. Check the connection of the auxiliary battery negative terminal cable.

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

    3. Check for arc marks on the auxiliary battery negative terminal cable.

      Result
      Result Proceed to
      The terminals are connected securely and there are no contact problems. There are no arc marks. A
      The terminals are not connected securely and there is a contact problem. There are arc marks. B
      The terminals are not connected securely and there is a contact problem. There are no arc marks. C
      The terminals are connected securely and there are no contact problems. There are arc marks. B

    B

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    C

    CONNECT SECURELY

    A

  25. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY NEGATIVE TERMINAL - BODY GROUND)


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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      Auxiliary battery negative terminal (-) - Body ground Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPAIR OR REPLACE FRAME WIRE (AUXILIARY BATTERY NEGATIVE TERMINAL - AMD TERMINAL)