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Home >> Lexus >> 2009 >> LS 600hL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P0A7A-324 - P1557-887)) >> Hybrid Control System >> DTC P0AE6-225: Hybrid Battery Precharge Contactor Control Circuit Low >> Procedure

DTC P0AE6-225: Hybrid Battery Precharge Contactor Control Circuit Low: Procedure

  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream 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
      - - - ◦ ◦ ◦

      HINT: 

      • ◦ : DTCs that are output
      • - : DTCs that are not output

    D → See step   18 

    C → See step   14 

    B → See step   12 

    A: Go to next step 

  2. CHECK FUSIBLE LINK AND FUSE 
    1. 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.
      Fig 1: Identifying IGCT2 NO. 2 Fuse
      GTY147633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      They are installed securely. There are no open circuits in the fusible link or fuse.

    NG → REPLACE FUSIBLE LINK AND FUSE 

    OK: Go to next step 

  3. CHECK FUSES (IGCT3 FUSE) 
    1. Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.
      Fig 2: Identifying IGCT3 Fuse
      GTY127688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → REPLACE FUSE (IGCT3 FUSE) 

    OK: Go to next step 

  4. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connections of the hybrid vehicle control ECU connectors.
      Fig 3: Identifying Hybrid Vehicle Control ECU Connectors
      GTY147636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → CONNECT SECURELY 

    OK: Go to next step 

  5. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Turn the power switch off.
    2. Remove the service plug grip. Refer to PRECAUTION .
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    3. Check the connection of the AMD terminal (hybrid vehicle converter side).
      Fig 4: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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

    C → CONNECT SECURELY 

    B → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    A: Go to next step 

  6. CHECK TERMINAL VOLTAGE (AMD TERMINAL) 
    1. Turn the power switch off.
      Fig 5: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 → See step   24 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE) 
    1. Disconnect the battery pack wire connector.
    2. Turn the power switch on (IG).
      Fig 6: Locating Battery Pack Wire Connector
      GTY147637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.
      Fig 7: Identifying zR2 Connector Terminals
      GTY122948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - Body ground Power switch on (IG) 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU) 
    1. Turn the power switch off.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 8: Identifying zR2 Connector Terminals
      GTY134942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Switch Condition Specified Condition
      zR2-8 (SMRP) - Body ground Power switch off 370 to 430 kΩ

    NG → See step   11 

    OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER) 
    WARNING:

    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 information because this may cause a malfunction.

    2. Disconnect the low voltage connector from the hybrid vehicle converter.
      Fig 9: Locating Low Voltage Connector Of Hybrid Vehicle Converter
      GTY137252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter. Refer toREMOVAL .

    3. Measure the resistance according to the value(s) in the table below.
      Fig 10: Checking Harness And Connector (Hybrid Vehicle Control ECU)
      GTY148093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - z35-1 (IGC2) Power switch off Below 1 Ω
      zR2-8 (SMRP) - z35-4 (SMRP) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) or z35-1 (IGC2) - Body ground Power switch off 10 kΩ or higher
      zR2-8 (SMRP) or z35-4 (SMRP) - Body ground Power switch off 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  10. CHECK HYBRID VEHICLE CONVERTER 
    1. Connect all the disconnected connectors.
      Fig 11: Checking Hybrid Vehicle Converter
      GTY147627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      zR2-8 (SMRP) - zR2-10 (GND) Power switch on (IG) 9 to 12 V

      HINT: 

      Perform this inspection with the battery pack wire connector connected.

    NG → See step   27 

    OK → See step   26 

  11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY PACK WIRE CONNECTOR) 
    1. Turn the power switch off.
    2. Disconnect connector A74 from the hybrid vehicle control ECU.
      Fig 12: Identifying A74 And zR2 Connector Terminals
      GTY143329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A74-25 (SMRP) - zR2-8 (SMRP) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A74-25 (SMRP) or zR2-8 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   26 

  12. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Turn the power switch off.
    2. Remove the service plug grip. Refer to PRECAUTION .
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    3. Check the connection of the AMD terminal (hybrid vehicle converter side).
      Fig 13: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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

    C → CONNECT SECURELY 

    B → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    A: Go to next step 

  13. CHECK TERMINAL VOLTAGE (AMD TERMINAL) 
    1. Turn the power switch off.
      Fig 14: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 → See step   24 

    OK → See step   27 

  14. CHECK FUSE 
    1. Check the fuse (IGCT2 NO. 2) in the engine room No. 3 relay block for improper installation and for an open circuit.
      Fig 15: Identifying IGCT2 NO. 2 Fuse
      GTY147633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → REPLACE FUSE (IGCT2 NO. 2 FUSE) 

    OK: Go to next step 

  15. CHECK FUSE (IGCT NO. 3 FUSE) 
    1. Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.
      Fig 16: Identifying IGCT3 Fuse
      GTY127688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → REPLACE FUSE (IGCT3 FUSE) 

    OK: Go to next step 

  16. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE) 
    1. Disconnect the battery pack wire connector. Refer to REMOVAL .
    2. Turn the power switch on (IG).
      Fig 17: Locating Battery Pack Wire Connector
      GTY147637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.
      Fig 18: Identifying zR2 Connector Terminals
      GTY122948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - Body ground Power switch on (IG) 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  17. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Turn the power switch off.
    2. Remove the service plug grip. Refer to PRECAUTION .
      Fig 19: Locating Low Voltage Connector Of Hybrid Vehicle Converter
      GTY137252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the low voltage connector from the hybrid vehicle converter.

      HINT: 

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter. Refer toREMOVAL .

    4. Measure the resistance according to the value(s) in the table below.
      Fig 20: Checking Harness And Connector (Battery Pack Wire Connector - Hybrid Vehicle Converter)
      GTY148094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - z35-1 (IGC2) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) or z35-1 (IGC2) - Body ground Power switch off 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   27 

  18. CHECK FUSIBLE LINK AND FUSE 
    1. 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.
      Fig 21: Identifying IGCT2 NO. 2 Fuse
      GTY147633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      They are installed securely. There are no open circuits in the fusible link or fuse.

    NG → REPLACE FUSIBLE LINK AND FUSE 

    OK: Go to next step 

  19. CHECK FUSE (IGCT NO. 3 FUSE) 
    1. Check the fuse (IGCT3) in the luggage room junction block assembly for improper installation and for an open circuit.
      Fig 22: Identifying IGCT3 Fuse
      GTY127688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → REPLACE FUSE (IGCT3 FUSE) 

    OK: Go to next step 

  20. CHECK HYBRID VEHICLE CONVERTER (AMD TERMINAL CONNECTION CONDITION) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Turn the power switch off.
    2. Remove the service plug grip. Refer to PRECAUTION .
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

    3. Check the connection of the AMD terminal (hybrid vehicle converter side).
      Fig 23: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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

    C → CONNECT SECURELY 

    B → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    A: Go to next step 

  21. CHECK TERMINAL VOLTAGE (AMD TERMINAL) 
    1. Turn the power switch off.
      Fig 24: Locating Connection Of AMD Terminal
      GTY148103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 → See step   24 

    OK: Go to next step 

  22. CHECK HARNESS AND CONNECTOR (IGC2 VOLTAGE) 
    1. Disconnect the battery pack wire connector.
    2. Turn the power switch on (IG).
      Fig 25: Locating Battery Pack Wire Connector
      GTY147637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.
      Fig 26: Identifying zR2 Connector Terminals
      GTY122948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - Body ground Power switch on (IG) 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  23. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE CONNECTOR - HYBRID VEHICLE CONVERTER) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      Fig 27: Locating Low Voltage Connector Of Hybrid Vehicle Converter
      GTY137252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the low voltage connector from the hybrid vehicle converter.

      HINT: 

      For the removal and installation procedures related to the low voltage connector of the hybrid vehicle converter. Refer toREMOVAL .

    3. Measure the resistance according to the value(s) in the table below.
      Fig 28: Checking Harness And Connector (Battery Pack Wire Connector - Hybrid Vehicle Converter)
      GTY148094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) - z35-1 (IGC2) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      zR2-11 (IGC2) or z35-1 (IGC2) - Body ground Power switch off 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   27 

  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

    C → CONNECT SECURELY 

    B → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    A: Go to next step 

  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 → See step   28 

  26. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL 
  27. REPLACE HYBRID VEHICLE CONVERTER. Refer to  REMOVAL 
  28. REPAIR OR REPLACE FRAME WIRE (AUXILIARY BATTERY NEGATIVE TERMINAL - AMD TERMINAL). Refer to  REMOVAL 
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