HYBRID CONTROL SYSTEM, Diagnostic DTC:U0110-160

DTC Code DTC Name
U0110-160 Lost Communication with Driver Motor Control Module

DESCRIPTION

Refer to the wiring diagram 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, nonstandard communication)

  • Wire harness or connector

  • Inverter with converter assembly

  • Hybrid vehicle control ECU

WIRING DIAGRAM

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

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.

Note

If DTC U0110-160 was set due to incomplete engagement of the connectors, and if the system returns to normal when the power switch is turned on (IG) after clearing the DTCs, DTC P0A1B-788 (power source IC reset) will be set. Proceed to troubleshooting without considering DTC P0A1B-788.

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 HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A01GXVPE04

      Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.

      Item Contents
      Tester Connection

      CH1: A78-10 (HTM+) - A77-7 (E1)

      CH2: A78-11 (HTM-) - A77-7 (E1)
      Equipment Setting 1 V/DIV., 200 μs./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

      Tech Tips

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


    B

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

    A

  2. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A01GZ4JE03

      Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.

      Item Contents
      Tester Connection

      CH1: A78-8 (CLK+) - A77-7 (E1)

      CH2: A78-9 (CLK-) - A77-7 (E1)
      Equipment Setting 1 V/DIV., 1 μs./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

      Tech Tips


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

      • Confirm that the oscilloscope being used is able to correctly display the waveform of CLK+ and CLK-.


    B

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

    A

  3. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A01GXIIE02

      Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.

      Item Contents
      Tester Connection

      CH1: A78-16 (REQ+) - A77-7 (E1)

      CH2: A78-17 (REQ-) - A77-7 (E1)
      Equipment Setting 1 V/DIV., 1 ms./DIV.
      Condition Power switch on (IG)
      Result
      Result Proceed to
      The waveform appears as shown in the illustration.

      A

      (for LHD)

      B

      (for RHD)
      The waveform differs from the one shown in the illustration. C

      Tech Tips

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


    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

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

    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

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

    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. Disconnect connector A78 from the hybrid vehicle control ECU.

    4. Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).

    5. Turn the power switch on (IG).

    6. A01GZR3E07

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A78-8 (CLK+) - Body ground Power switch on (IG) Below 1 V
      A78-9 (CLK-) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU 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)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-8 (CLK+) - A79-14 (CLK+) Power switch off Below 1 Ω
      A78-9 (CLK-) - A79-13 (CLK-) Power switch off Below 1 Ω
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-8 (CLK+) - A88-14 (CLK+) Power switch off Below 1 Ω
      A78-9 (CLK-) - A88-13 (CLK-) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-8 (CLK+) or A79-14 (CLK+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-9 (CLK-) or A79-13 (CLK-) - Body ground and other terminals Power switch off 10 kΩ or higher
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-8 (CLK+) or A88-14 (CLK+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-9 (CLK-) or A88-13 (CLK-) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK INVERTER WITH CONVERTER ASSEMBLY


    1. Turn the power switch off.

    2. Connect the low voltage connector of the inverter with converter assembly.

    3. A01GZHZE04

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A78-8 (CLK+) - A78-9 (CLK-) Power switch off 111 to 129 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

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

    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. Disconnect connector A78 from the hybrid vehicle control ECU.

    4. Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).

    5. Turn the power switch on (IG).

    6. A01GZR3E08

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) - Body ground Power switch on (IG) Below 1 V
      A78-17 (REQ-) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU or 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)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) - A79-34 (REQ+) Power switch off Below 1 Ω
      A78-17 (REQ-) - A79-33 (REQ-) Power switch off Below 1 Ω
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) - A88-34 (REQ+) Power switch off Below 1 Ω
      A78-17 (REQ-) - A88-33 (REQ-) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) or A79-34 (REQ+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-17 (REQ-) or A79-33 (REQ-) - Body ground and other terminals Power switch off 10 kΩ or higher
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) or A88-34 (REQ+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-17 (REQ-) or A88-33 (REQ-) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK INVERTER WITH CONVERTER ASSEMBLY


    1. Turn the power switch off.

    2. Connect the low voltage connector of the inverter with converter assembly.

    3. A01GZHZE05

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      A78-16 (REQ+) - A78-17 (REQ-) Power switch off 111 to 129 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

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

    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. Disconnect connector A78 from the hybrid vehicle control ECU.

    4. Disconnect the low voltage connector from the inverter with converter assembly (MG ECU).

    5. Turn the power switch on (IG).

    6. A01GZR3E10

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A78-10 (HTM+) - Body ground Power switch on (IG) Below 1 V
      A78-11 (HTM-) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector of the hybrid vehicle control ECU or 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)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-10 (HTM+) - A79-23 (HTM+) Power switch off Below 1 Ω
      A78-11 (HTM-) - A79-22 (HTM-) Power switch off Below 1 Ω
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-10 (HTM+) - A88-23 (HTM+) Power switch off Below 1 Ω
      A78-11 (HTM-) - A88-22 (HTM-) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      LHD
      Tester Connection Switch Condition Specified Condition
      A78-10 (HTM+) or A79-23 (HTM+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-11 (HTM-) or A79-22 (HTM-) - Body ground and other terminals Power switch off 10 kΩ or higher
      RHD
      Tester Connection Switch Condition Specified Condition
      A78-10 (HTM+) or A88-23 (HTM+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A78-11 (HTM-) or A88-22 (HTM-) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK INVERTER WITH CONVERTER ASSEMBLY


    1. Turn the power switch off.

    2. Connect the low voltage connector of the inverter with converter assembly.

    3. A01GZHZE06

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A78-10 (HTM+) - A78-11 (HTM-) Power switch off 111 to 129 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    C

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here