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Home >> Toyota >> 2015 >> Avalon Hybrid Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes - (Hybrid) (2 Of 8) >> Hybrid Control System >> DTC U0110-160: Lost Communication with Drive Motor Control Module "A" [10/2015 - ] >> Procedure

DTC U0110-160: Lost Communication with Drive Motor Control Module "A" [10/2015 - ]: Procedure

  1. CLEAR DTC 

    Refer to PROCEDURE - Step 4

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream 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.

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

    (Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2014 - ] )

    A 

    See step  3

  3. CHECK INVERTER WITH CONVERTER ASSEMBLY (GENERATOR CABLE CONNECTION CONDITION) 

    Refer to PROCEDURE - Step 9

    B 

    REPLACE MALFUNCTIONING PARTS 

    C 

    CONNECT SECURELY 

    A 

    See step  4

  4. CHECK INVERTER WITH CONVERTER ASSEMBLY (MOTOR CABLE CONNECTION CONDITION) 

    Refer to PROCEDURE - Step 10

    B 

    REPLACE MALFUNCTIONING PARTS 

    C 

    CONNECT SECURELY 

    A 

    See step  5

  5. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG1) 

    Refer to PROCEDURE - Step 11

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

    When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

    OK 

    See step  6

  6. CHECK HYBRID VEHICLE TRANSAXLE ASSEMBLY (MG2) 

    Refer to PROCEDURE - Step 12

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 

    When Not Using the Engine Support Bridge: Refer to COMPONENTS [10/2014 - ]

    When Using the Engine Support Bridge: Refer to COMPONENTS [10/2015 - ]

    OK 

    See step  7

  7. 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. Measure the waveform.
      GTY608858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)
      Item Contents
      Tester Connection CH1: A68-24 (HTM+) - D135-6 (E1)
      CH2: A68-25 (HTM-) - D135-6 (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

      HINT: 

      • 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.

    B 

    See step  14

    A 

    See step  8

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

    See step  9

    B 

    See step  10

    A 

    See step  9

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

    See step  10

    A 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

    B 

    See step  12

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

    See step  12

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK 

    See step  11

  11. CHECK INVERTER WITH CONVERTER ASSEMBLY (CLK) 

    See step  13

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

    NG 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

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

    See step  14

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK 

    See step  13

  13. CHECK INVERTER WITH CONVERTER ASSEMBLY (REQ) 

    See step  15

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

    NG 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

  14. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (HTM) 
    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 otherwise instructed because this may cause a malfunction.

    2. Disconnect the A68 hybrid vehicle control ECU assembly connector.
    3. Disconnect the A50 inverter with converter assembly connector.
    4. Connect the cable to the negative (-) auxiliary battery terminal.
    5. Turn the power switch on (IG).
    6. Measure the voltage according to the value (s) in the table below.
      GTY573494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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)

      Standard Voltage

      Tester Connection Condition Specified Condition
      A68-24 (HTM+) - Body ground Power switch on (IG) Below 1 V
      A68-25 (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 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
      A68-24 (HTM+) - A50-9 (HTM+) Power switch off Below 1 Ω
      A68-25 (HTM-) - A50-20 (HTM-) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A68-24 (HTM+) or A50-9 (HTM+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A68-25 (HTM-) or A50-20 (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 A50 inverter with converter assembly connector.
    11. Reconnect the A68 hybrid vehicle control ECU assembly connector.

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK 

    See step  15

  15. CHECK INVERTER WITH CONVERTER ASSEMBLY (HTM) 
    1. Disconnect the A68 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value (s) in the table below.
      GTY567334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A68-24 (HTM+) - A68-25 (HTM-) Power switch off 80 to 170 Ω
    3. Reconnect the A68 hybrid vehicle control ECU assembly connector.

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

    NG 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

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