Click here

HYBRID CONTROL SYSTEM, Diagnostic DTC:U0110-160

Click here
Click here
DTC Code DTC Name
U0110-160 Lost Communication with Drive Motor Control Module "A"
Click here

DESCRIPTION

Refer to the description for DTC U0110-159 (Click here).

DTC No. INF Code DTC Detection Condition Trouble Area
U0110 160 Error in signal transmission to the inverter with converter assembly (MG ECU) via serial communication (no transmission, out of communication standard)

  • Wire harness or connector

  • Inverter with converter assembly

  • Hybrid vehicle transaxle assembly

  • Hybrid vehicle control ECU assembly
Click here

WIRING DIAGRAM

Refer to the wiring diagram for DTC U0110-159 (Click here).

Click here

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).

  • If the DTC U0110-160 was stored due to incomplete engagement of the connectors, and if the system returns to normal when the power switch is on (IG) after clearing the DTCs, DTC P324E-788 will be stored. Proceed to troubleshooting without considering DTC P324E-788.

Click here

PROCEDURE


  1. Click here

    CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Clear the DTCs and freeze frame data.

    5. Turn the power switch off.


  2. Click here

    CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.

      Result
      Result Proceed to
      DTC U0110-160 is output. A
      DTC U0110-160 is not output. B

    5. Turn the power switch off.


  3. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION)

    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. B001VFZ

      Remove the upper inverter cover (generator cable side) from the inverter with converter assembly.

    3. B001VBO

      Check that the bolts for the generator cable are tightened to the specified torque, the generator cable is connected securely, and there are no contact problems.

      Specified Condition
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Note:

      Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    4. Disconnect the generator cable from the inverter with converter assembly.

    5. Check for arc marks at the terminals for the generator 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

    6. Connect the generator cable to the inverter with converter assembly.

    7. Install the upper inverter cover (generator cable side).


    • AClick here
    • B

      REPLACE MALFUNCTIONING PARTS

    • C

      CONNECT SECURELY

  4. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION)

    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. B001VC0

      Remove the upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFI

      Check that the bolts for the motor cable are tightened to the specified torque, the motor cable is connected securely, and there are no contact problems.

      Specified Condition
      T=8.0 N*m (82 kgf*cm, 71 in.*lbf)
      Note:

      Make sure that the tightening torque of the bolt is between 6.4 and 9.6 N*m (65 and 98 kgf*cm, 57 and 85 in.*lbf).

    4. Disconnect the motor cable from the inverter with converter assembly.

    5. Check for arc marks at the terminals for the motor 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

    6. Connect the motor cable to the inverter with converter assembly.

    7. Install the upper inverter cover (motor cable side).


    • AClick here
    • B

      REPLACE MALFUNCTIONING PARTS

    • C

      CONNECT SECURELY

  5. Click here

    CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1)

    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. B001VFH

      Remove the upper inverter cover (generator cable side) and upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFDE02

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

      Table 1. Text in Illustration
      *1 Generator Cable
      *2 Motor Cable
    4. B001VH3E01

      Check MG1 for an interphase short using a milliohmmeter.


      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

        Tip:

        If the MG1 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

        Standard Resistance
        Tester Connection Condition Specified Condition
        e1-1 (W) - e1-3 (U) Power switch off 59.1 to 67.5 mΩ
        e1-2 (V) - e1-1 (W) Power switch off 59.1 to 67.5 mΩ
        e1-3 (U) - e1-2 (V) Power switch off 62.1 to 70.5 mΩ
        Table 2. Text in Illustration
        *1 Shield Ground
        *a

        Generator Cable

        (Inverter with Converter Assembly Side)
        Tip:

        To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).


        • R20 = Rt / {1 + 0.00393 X (T - 20)}

        The calculation is based on the following:


        • R20: Resistance at 20°C (68° F) (mΩ)

        • Rt: Measured resistance (mΩ)

        • T: Temperature when the resistance is measured (°C)

    5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note:

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      e1-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      e1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      e1-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    6. Connect the generator cable and motor cable.

    7. Install the upper inverter cover (generator cable side) and upper inverter cover (motor cable side).


  6. Click here

    CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2)

    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. B001VFH

      Remove the upper inverter cover (generator cable side) and upper inverter cover (motor cable side) from the inverter with converter assembly.

    3. B001VFDE02

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

      Table 3. Text in Illustration
      *1 Generator Cable
      *2 Motor Cable
    4. B001VF9E01

      Check MG2 for an interphase short using a milliohmmeter.


      1. Using a milliohmmeter, measure the resistance according to the value(s) in the table below.

        Tip:

        If the MG2 temperature is high, the resistance will vary greatly from the specification. Therefore, measure the resistance at least 8 hours after the vehicle is stopped.

        Standard Resistance
        Tester Connection Condition Specified Condition
        d1-1 (W) - d1-3 (U) Power switch off 71.4 to 81.0 mΩ
        d1-2 (V) - d1-1 (W) Power switch off 71.4 to 81.0 mΩ
        d1-3 (U) - d1-2 (V) Power switch off 74.4 to 84.1 mΩ
        Table 4. Text in Illustration
        *1 Shield Ground
        *a

        Motor Cable

        (Inverter with Converter Assembly Side)
        Tip:

        To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68° F).


        • R20 = Rt / {1 + 0.00393 X (T - 20)}

        The calculation is based on the following:


        • R20: Resistance at 20°C (68° F) (mΩ)

        • Rt: Measured resistance (mΩ)

        • T: Temperature when the resistance is measured (°C)

    5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note:

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Condition Specified Condition
      d1-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      d1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      d1-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    6. Connect the generator cable and motor cable.

    7. Install the upper inverter cover (generator cable side) and upper inverter cover (motor cable side).


  7. Click here

    CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM (HTM))


    1. Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the following table.

    2. Turn the power switch on (IG).

    3. A00066ZE01

      Measure the waveform.

      Item Contents
      Tester Connection

      CH1: A79-24 (HTM+) - H211-6 (E1)

      CH2: A79-25 (HTM-) - H211-6 (E1)
      Equipment Setting 1V/DIV., 200μs/DIV.
      Condition Power switch on (IG)
      Result
      Result Proceed to
      The waveform appears as shown in the illustration. A
      The waveform differs from the one shown in the illustration. B
      Table 5. Text in Illustration
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)
      Tip:

      • Inspect with the connector connected.

      • If pulses are generated, the shape of the waveform can be assumed to be normal.

      • The shape of the waveform may vary according to communication conditions.

    4. Turn the power switch off.


  8. Click here

    CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM (CLK))


    1. Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the following table.

    2. Turn the power switch on (IG).

    3. A00048GE01

      Measure the waveform.

      Item Contents
      Tester Connection

      CH1: A79-33 (CLK+) - H211-6 (E1)

      CH2: A79-32 (CLK-) - H211-6 (E1)
      Equipment Setting 1V/DIV., 1μs/DIV.
      Condition Power switch on (IG)
      Result
      Result Proceed to
      The waveform appears as shown in the illustration. A
      The waveform differs from the one shown in the illustration. B
      Table 6. Text in Illustration
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)
      Tip:

      • Inspect with the connector connected.

      • If pulses are generated, the shape of the waveform can be assumed to be normal.

      • The shape of the waveform may vary according to communication conditions.

    4. Turn the power switch off.


  9. Click here

    CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM (REQ))


    1. Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the following table.

    2. Turn the power switch on (IG).

    3. A0008R6E01

      Measure the waveform.

      Item Contents
      Tester Connection

      CH1: A79-31 (REQ+) - H211-6 (E1)

      CH2: A79-30 (REQ-) - H211-6 (E1)
      Equipment Setting 1V/DIV., 1ms/DIV.
      Condition Power switch on (IG)
      Result
      Result Proceed to
      The waveform appears as shown in the illustration. A
      The waveform differs from the one shown in the illustration. B
      Table 7. Text in Illustration
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)
      Tip:

      • Inspect with the connector connected.

      • If pulses are generated, the shape of the waveform can be assumed to be normal.

      • The shape of the waveform may vary according to communication conditions.

    4. Turn the power switch off.


  10. Click here

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (CLK)

    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. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    3. Disconnect the A14 inverter with converter assembly connector.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Turn the power switch on (IG).

    6. A0005I6E02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-33 (CLK+) - Body ground Power switch on (IG) Below 1 V
      A79-32 (CLK-) - Body ground Power switch on (IG) Below 1 V
      Table 8. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      Note:

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly connector and the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A79-33 (CLK+) - A14-7 (CLK+) Power switch off Below 1 Ω
      A79-32 (CLK-) - A14-18 (CLK-) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A79-33 (CLK+) or A14-7 (CLK+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-32 (CLK-) or A14-18 (CLK-) - Body ground and other terminals Power switch off 10 kΩ or higher

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

    10. Reconnect the A14 inverter with converter assembly connector.

    11. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (CLK)


    1. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    2. A000738E02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-33 (CLK+) - A79-32 (CLK-) Power switch off 80 to 170 Ω
      Table 9. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

    3. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OK

      REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY (Click here)

    • NG

      REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

  12. Click here

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (REQ)

    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. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    3. Disconnect the A14 inverter with converter assembly connector.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Turn the power switch on (IG).

    6. A00093LE02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-31 (REQ+) - Body ground Power switch on (IG) Below 1 V
      A79-30 (REQ-) - Body ground Power switch on (IG) Below 1 V
      Table 10. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      Note:

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly connector and the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A79-31 (REQ+) - A14-26 (REQ+) Power switch off Below 1 Ω
      A79-30 (REQ-) - A14-37 (REQ-) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A79-31 (REQ+) or A14-26 (REQ+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-30 (REQ-) or A14-37 (REQ-) - Body ground and other terminals Power switch off 10 kΩ or higher

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

    10. Reconnect the A14 inverter with converter assembly connector.

    11. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (REQ)


    1. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    2. A0007WYE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-31 (REQ+) - A79-30 (REQ-) Power switch off 80 to 170 Ω
      Table 11. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

    3. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OK

      REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY (Click here)

    • NG

      REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

  14. Click here

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (HTM)

    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. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    3. Disconnect the A14 inverter with converter assembly connector.

    4. Connect the cable to the negative (-) auxiliary battery terminal.

    5. Turn the power switch on (IG).

    6. A0005OIE02

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) - Body ground Power switch on (IG) Below 1 V
      A79-25 (HTM-) - Body ground Power switch on (IG) Below 1 V
      Table 12. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Inverter with Converter Assembly)
      Note:

      Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU assembly and the low voltage connector of the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) - A14-9 (HTM+) Power switch off Below 1 Ω
      A79-25 (HTM-) - A14-20 (HTM-) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) or A14-9 (HTM+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A79-25 (HTM-) or A14-20 (HTM-) - Body ground and other terminals Power switch off 10 kΩ or higher

    9. Disconnect the cable from the negative (-) auxiliary battery terminal.

    10. Reconnect the A14 inverter with converter assembly connector.

    11. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. Click here

    CHECK INVERTER WITH CONVERTER ASSEMBLY (HTM)


    1. Disconnect the A79 hybrid vehicle control ECU assembly connector.

    2. A00096GE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A79-24 (HTM+) - A79-25 (HTM-) Power switch off 80 to 170 Ω
      Table 13. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

    3. Reconnect the A79 hybrid vehicle control ECU assembly connector.


    • OK

      REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY (Click here)

    • NG

      REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)