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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 U0110-159: Lost Communication with Drive Motor Control Module "A"; DTC U0110-656: Lost Communication with Drive Motor Control Module "A"; DTC U0110-657: Lost Communication with Drive Motor Control Module "A" [10/2015 - ] >> Procedure

DTC U0110-159: Lost Communication with Drive Motor Control Module "A"; DTC U0110-656: Lost Communication with Drive Motor Control Module "A"; DTC U0110-657: Lost Communication with Drive Motor Control Module "A" [10/2015 - ]: Procedure

  1. CHECK FUSE (INV) 
    1. Remove the INV fuse from the No. 2 engine room relay block.
    2. Measure the resistance according to the value (s) in the table below.
      GTY318219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block
      *2 INV Fuse

      Standard Resistance

      Tester Connection Condition Specified Condition
      INV fuse terminals Always Below 1 Ω
    3. Install the INV fuse.

    NG 

    See step  18

    OK 

    See step  2

  2. CLEAR DTC 

    Refer to PROCEDURE - Step 4

    NEXT 

    See step  3

  3. 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 U0110-159, 656 or 657 is output. A
      DTC U0110-159, 656 and 657 are 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  4

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

    Refer to PROCEDURE - Step 9

    B 

    REPLACE MALFUNCTIONING PARTS 

    C 

    CONNECT SECURELY 

    A 

    See step  5

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

    Refer to PROCEDURE - Step 10

    B 

    REPLACE MALFUNCTIONING PARTS 

    C 

    CONNECT SECURELY 

    A 

    See step  6

  6. 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  7

  7. 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  8

  8. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT) 
    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 A50 inverter with converter assembly connector.
    3. Measure the resistance according to the value (s) in the table below.
      GTY585355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A50-10 (GND1) - Body ground Power switch off Below 1 Ω
      A50-11 (GND2) - Body ground Power switch off Below 1 Ω
    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.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A50-30 (+B) - Body ground Power switch on (IG) 11 to 14 V
      A50-31 (+B2) - Body ground Power switch on (IG) 11 to 14 V
      NOTE:

      Turning the power switch on (IG) with 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. Reconnect the A50 inverter with converter assembly connector.

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK 

    See step  9

  9. 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. Measure the waveform.
      GTY572805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)
      Item Contents
      Tester Connection CH1: A68-33 (CLK+) - D135-6 (E1)
      CH2: A68-32 (CLK-) - D135-6 (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

      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  12

    A 

    See step  10

  10. 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. Measure the waveform.
      GTY552226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)
      Item Contents
      Tester Connection CH1: A68-31 (REQ+) - D135-6 (E1)
      CH2: A68-30 (REQ-) - D135-6 (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
      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  11

  11. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM (MTH)) 
    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.
      GTY610367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)
      Item Contents
      Tester Connection CH1: A68-23 (MTH+) - D135-6 (E1)
      CH2: A68-22 (MTH-) - 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.

    A 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

    B 

    See step  16

  12. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (CLK) 
    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.
      GTY584156Courtesy 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
      A68-33 (CLK+) - Body ground Power switch on (IG) Below 1 V
      A68-32 (CLK-) - Body ground Power switch on (IG) Below 1 V
      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
      A68-33 (CLK+) - A50-7 (CLK+) Power switch off Below 1 Ω
      A68-32 (CLK-) - A50-18 (CLK-) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A68-33 (CLK+) or A50-7 (CLK+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A68-32 (CLK-) or A50-18 (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 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  13

  13. CHECK INVERTER WITH CONVERTER ASSEMBLY (CLK) 
    1. Disconnect the A68 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value (s) in the table below.
      GTY600200Courtesy 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
      A68-33 (CLK+) - A68-32 (CLK-) 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 - ] )

  14. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (REQ) 
    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.
      GTY555682Courtesy 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
      A68-31 (REQ+) - Body ground Power switch on (IG) Below 1 V
      A68-30 (REQ-) - Body ground Power switch on (IG) Below 1 V
      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
      A68-31 (REQ+) - A50-26 (REQ+) Power switch off Below 1 Ω
      A68-30 (REQ-) - A50-37 (REQ-) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A68-31 (REQ+) or A50-26 (REQ+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A68-30 (REQ-) or A50-37 (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 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 (REQ) 
    1. Disconnect the A68 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value (s) in the table below.
      GTY543978Courtesy 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
      A68-31 (REQ+) - A68-30 (REQ-) 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 - ] )

  16. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WITH CONVERTER ASSEMBLY) (MTH) 
    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.
      GTY577974Courtesy 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
      A68-23 (MTH+) - Body ground Power switch on (IG) Below 1 V
      A68-22 (MTH-) - Body ground Power switch on (IG) Below 1 V
      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
      A68-23 (MTH+) - A50-8 (MTH+) Power switch off Below 1 Ω
      A68-22 (MTH-) - A50-19 (MTH-) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A68-23 (MTH+) or A50-8 (MTH+) - Body ground and other terminals Power switch off 10 kΩ or higher
      A68-22 (MTH-) or A50-19 (MTH-) - 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  17

  17. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (MTH) 
    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 A50 inverter with converter assembly connector.
    3. Measure the resistance according to the value (s) in the table below.
      GTY597088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A68-23 (MTH+) - A68-22 (MTH-) Power switch off 80 to 170 Ω
    4. Reconnect the A50 inverter with converter assembly connector.

    OK 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (Refer to COMPONENTS [10/2015 - ] )

  18. REPLACE FUSE (INV) 
    1. Replace the INV fuse.
      GTY318219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block
      *2 INV Fuse
    2. Turn the power switch on (READY).
    3. Check if there is an open circuit in the INV fuse in the No. 2 engine room relay block.

      OK

      There is no open circuit in the INV fuse.

      HINT: 

      If the fuse does not become open again after turning the power switch on (READY), it can be assumed that the previous fuse failed due to age.

    4. Turn the power switch off.

    OK 

    COMPLETED 

    NG 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - INV FUSE) 
    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. Remove the INV fuse from the No. 2 engine room relay block.
      GTY318219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block
      *2 INV Fuse
    3. Disconnect the A50 inverter with converter assembly connector.
    4. Measure the resistance according to the value (s) in the table below.
      GTY595532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Engine Room Relay Block *2 INV Fuse
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)      		 - -

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A50-30 (+B), A50-31 (+B2) or 2 (INV fuse terminal) - Body ground and other terminals Power switch off 10 kΩ or higher
    5. Reconnect the A50 inverter with converter assembly connector.
    6. Install the INV fuse.

    NG 

    See step  21

    OK 

    See step  20

  20. REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    (Refer to COMPONENTS [10/2014 - ] )

    NEXT 

    REPLACE FUSE (INV) 

  21. REPAIR OR REPLACE HARNESS OR CONNECTOR 

    NEXT 

    REPLACE FUSE (INV) 

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