DTC    U0110-159    Lost Communication with Driver Motor Control Module

DTC    U0110-656    Lost Communication with Driver Motor Control Module

DTC    U0110-657    Lost Communication with Driver Motor Control Module

for Preparation Click here


DESCRIPTION

  1. For a description of the inverter with converter assembly, (Click here).
    The inverter with converter assembly (MG ECU) controls MG2 based on commands from the hybrid vehicle control ECU via serial communication.
    The inverter with converter assembly (MG ECU) monitors communication data and detects malfunctions.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
U0110
159
Error in reception from the inverter with converter assembly (MG ECU) via serial communication (out of communication standard)
  1. Wire harness or connector
  2. Inverter with converter assembly (MG ECU)
  3. Hybrid vehicle control ECU
U0110
656
Error in reception from the inverter with converter assembly (MG ECU) via serial communication (out of communication standard)
  1. Wire harness or connector
  2. Inverter with converter assembly (MG ECU)
  3. Hybrid vehicle control ECU
U0110
657
Error in reception from the inverter with converter assembly (MG ECU) via serial communication (no reception)
  1. Wire harness or connector
  2. Inverter with converter assembly (MG ECU)
  3. Hybrid vehicle control ECU

WIRING DIAGRAM


A144933E03


INSPECTION PROCEDURE

CAUTION:
  1. 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.
  2. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

NOTICE:
  1. If any of U0110-159, 656 or 657 are detected, clearing DTCs using the intelligent tester will cause DTC P0A1B-788 (power source IC reset) to be output. Proceed to troubleshooting without considering this code.
  2. Before starting the following inspections, check the IGCT No. 2 fuse for continuity. If the fuse has continuity, perform the following inspections. If the fuse has no continuity, replace the IGCT No. 2 fuse and then turn the power switch on (READY). If the fuse does not burn out and no DTCs are stored by turning the power switch on (READY), the inspection regarding these DTCs is complete at this point. If the IGCT No. 2 fuse burns out again, replace the IGCT No. 2 fuse and the inverter with converter assembly.

HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

1.CLEAR DTC (HV)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Read and record the DTCs and freeze frame data.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC / Clear.

  1. Clear the DTCs.


NEXT


2.RECONFIRM DTC OUTPUT (HV)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Select the following menu items: Powertrain / Hybrid Control / DTC.

  1. Check if DTCs are output.

    Result:
    DTC U0110-159, 160, 656 or 657 is output.



NO
CHECK FOR INTERMITTENT PROBLEMS
YES


3.CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY POWER SOURCE CIRCUIT)

CAUTION:
Be sure to wear insulated gloves.

  1. Turn the power switch off and remove the service plug grip (Click here).

    NOTICE:
    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.

  1. Disconnect the low voltage connector from the inverter with converter assembly.

  1. Turn the power switch off.



    A131159E12
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    LHD:
    Tester Connection
    Specified Condition
    GND1 (A59-11) - Body ground
    Below 1 Ω
    GND2 (A59-10) - Body ground
    Below 1 Ω
    RHD:
    Tester Connection
    Specified Condition
    GND1 (A62-11) - Body ground
    Below 1 Ω
    GND2 (A62-10) - Body ground
    Below 1 Ω

  1. Turn the power switch on (IG).

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

    Standard voltage:
    LHD:
    Tester Connection
    Specified Condition
    +B (A59-31) - Body ground
    10 to 14 V
    +B2 (A59-30) - Body ground
    10 to 14 V
    RHD:
    Tester Connection
    Specified Condition
    +B (A62-31) - Body ground
    10 to 14 V
    +B2 (A62-30) - Body ground
    10 to 14 V

    NOTICE:
    1. 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.
    2. If the result is not as specified, be sure to inspect the IGCT No. 2 fuse for continuity. If there is no continuity, replace the IGCT No. 2 fuse.



NG
REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK


4.CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)
  1. Turn the power switch off.

  1. Disconnect connector A55 from the hybrid vehicle control ECU.

  1. Turn the power switch on (IG).



    A131170E10
  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) - Body ground
    Below 1 V
    CLK- (A55-84) - Body ground
    Below 1 V
    REQ+ (A55-108) - Body ground
    Below 1 V
    REQ- (A55-85) - Body ground
    Below 1 V
    MTH+ (A55-106) - Body ground
    Below 1 V
    MTH- (A55-83) - Body ground
    Below 1 V

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

  1. Turn the power switch off.

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

    Standard resistance (Check for open):
    LHD:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) - CLK+ (A59-39)
    Below 1 Ω
    CLK- (A55-84) - CLK- (A59-38)
    Below 1 Ω
    REQ+ (A55-108) - REQ+ (A59-29)
    Below 1 Ω
    REQ- (A55-85) - REQ- (A59-20)
    Below 1 Ω
    MTH+ (A55-106) - MTH+ (A59-8)
    Below 1 Ω
    MTH- (A55-83) - MTH- (A59-7)
    Below 1 Ω
    RHD:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) - CLK+ (A62-39)
    Below 1 Ω
    CLK- (A55-84) - CLK- (A62-38)
    Below 1 Ω
    REQ+ (A55-108) - REQ+ (A62-29)
    Below 1 Ω
    REQ- (A55-85) - REQ- (A62-20)
    Below 1 Ω
    MTH+ (A55-106) - MTH+ (A62-8)
    Below 1 Ω
    MTH- (A55-83) - MTH- (A62-7)
    Below 1 Ω


    Standard resistance (Check for short):
    LHD:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) or CLK+ (A59-39) - Body ground
    10 kΩ or more
    CLK- (A55-84) or CLK- (A59-38) - Body ground
    10 kΩ or more
    REQ+ (A55-108) or REQ+ (A59-29) - Body ground
    10 kΩ or more
    REQ- (A55-85) or REQ- (A59-20) - Body ground
    10 kΩ or more
    MTH+ (A55-106) or MTH+ (A59-8) - Body ground
    10 kΩ or more
    MTH- (A55-83) or MTH- (A59-7) - Body ground
    10 kΩ or more
    RHD:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) or CLK+ (A62-39) - Body ground
    10 kΩ or more
    CLK- (A55-84) or CLK- (A62-38) - Body ground
    10 kΩ or more
    REQ+ (A55-108) or REQ+ (A62-29) - Body ground
    10 kΩ or more
    REQ- (A55-85) or REQ- (A62-20) - Body ground
    10 kΩ or more
    MTH+ (A55-106) or MTH+ (A62-8) - Body ground
    10 kΩ or more
    MTH- (A55-83) or MTH- (A62-7) - Body ground
    10 kΩ or more



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HYBRID VEHICLE CONTROL ECU
  1. Turn the power switch off.

  1. Connect the connector to the hybrid vehicle control ECU connector.



    A131159E27
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    LHD:
    Tester Connection
    Specified Condition
    CLK+ (A59-39) - CLK- (A59-38)
    109 to 139 Ω
    REQ+ (A59-29) - REQ- (A59-20)
    109 to 139 Ω
    MTH+ (A59-8) - MTH- (A59-7)
    109 to 139 Ω
    RHD:
    Tester Connection
    Specified Condition
    CLK+ (A62-39) - CLK- (A62-38)
    109 to 139 Ω
    REQ+ (A62-29) - REQ- (A62-20)
    109 to 139 Ω
    MTH+ (A62-8) - MTH- (A62-7)
    109 to 139 Ω



NG
REPLACE HYBRID VEHICLE CONTROL ECU (Click here)
OK


6.CHECK INVERTER WITH CONVERTER ASSEMBLY
  1. Turn the power switch off.

  1. Connect the connector to the inverter with converter assembly.



    A131157E13
  1. Disconnect connector A55 from the hybrid vehicle control ECU.

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

    Standard resistance:
    Tester Connection
    Specified Condition
    CLK+ (A55-107) - CLK- (A55-84)
    109 to 139 Ω
    REQ+ (A55-108) - REQ- (A55-85)
    109 to 139 Ω
    MTH+ (A55-106) - MTH- (A55-83)
    109 to 139 Ω



NG
REPLACE INVERTER WITH CONVERTER ASSEMBLY
OK


7.CHECK HYBRID VEHICLE CONTROL ECU


    A145071E01
  1. Connect the hybrid vehicle control ECU connectors.

  1. Disconnect the low voltage connector from the inverter with converter assembly.

  1. Connect an oscilloscope between the inverter with convertor assembly connector terminals specified in the table below, and measure the waveform.
    LHD: 
    Item
    Contents
    Terminal
    CH1: CLK+ (A59-39) - GND1 (A59-11)
    CH2: CLK- (A59-38) - GND1 (A59-11)
    CH1: REQ+ (A59-29) - GND1 (A59-11)
    CH1: REQ- (A59-20) - GND1 (A59-11)
    CH1: HTM+ (A59-27) - GND1 (A59-11)
    CH1: HTM- (A59-26) - GND1 (A59-11)
    Equipment Setting
    CH1, 2: 1 V/DIV., 1 μs/DIV.
    CH3, 4: 1 V/DIV., 1 ms/DIV.
    CH5, 6: 1 V/DIV., 200 μs/DIV.
    Condition
    Power switch on (IG)
    RHD: 
    Item
    Contents
    Terminal
    CH1: CLK+ (A62-39) - GND1 (A62-11)
    CH2: CLK- (A62-38) - GND1 (A62-11)
    CH1: REQ+ (A62-29) - GND1 (A62-11)
    CH1: REQ- (A62-20) - GND1 (A62-11)
    CH1: HTM+ (A62-27) - GND1 (A62-11)
    CH1: HTM- (A62-26) - GND1 (A62-11)
    Equipment Setting
    CH1, 2: 1 V/DIV., 1 μs/DIV.
    CH3, 4: 1 V/DIV., 1 ms/DIV.
    CH5, 6: 1 V/DIV., 200 μs/DIV.
    Condition
    Power switch on (IG)

    Result:
    The waveform appears as shown in the illustration.

    NOTICE:
    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.



NG
REPLACE HYBRID VEHICLE CONTROL ECU (Click here)
OK

REPLACE INVERTER WITH CONVERTER ASSEMBLY