HYBRID CONTROL SYSTEM, Diagnostic DTC:U011187

DTC Code DTC Name
U011187 Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message

DESCRIPTION

The hybrid vehicle control ECU transmits and receives signals via CAN communication to and from the battery ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
U011187 Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message

The hybrid vehicle control ECU cannot receive signals from the battery ECU assembly

(1 trip detection logic)

  • Battery ECU assembly

  • Hybrid vehicle control ECU

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. Turn the power switch on (READY) and wait for 2 minutes or more.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

B006J39E02

CAUTION / NOTICE / HINT

CAUTION:


  • B006HUP

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

    • Disconnecting the low voltage connector of the electric vehicle charger assembly

    • Disconnecting the low voltage connector of the solar energy control unit

  • B006IQP

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • B006HQC

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B006IVPC05
    *a Without waiting for 10 minutes

    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

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger 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.

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PROCEDURE


  1. CHECK DTC OUTPUT (HV BATTERY)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / HV Battery / Trouble Codes.

    4. Check and record any HV system DTCs and freeze frame data. Check for DTCs.


      Powertrain > HV Battery > Trouble Codes
      Result
      Result Proceed to
      DTCs related to HV Battery are not output. A
      DTCs related to HV Battery are output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here

    A

  2. CHECK BATTERY ECU ASSEMBLY (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

    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. Remove the upper hybrid battery cover sub-assembly.

      Click here

    3. Disconnect the t14 battery ECU assembly connector.

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

    5. Turn the power switch on (IG).

    6. B006HSPC10
      *a

      Front view of wire harness connector

      (to Battery ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      t14-1 (AM) - Body ground Power switch off 11 to 14 V
      t14-24 (IGCT) - Body ground Power switch on (IG) 11 to 14 V

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      Tech Tips

      As there might be an intermittent malfunction in the battery ECU assembly power source circuit, inspect the following even if the measured voltage is as specified:


      • Installation condition of fuse(s) (before removing fuse(s)) (Power Source Circuit)

      • Fuse condition (before and after removing fuse(s)) (Power Source Circuit)

      • Connection condition of connectors (Power Source Circuit)

      • Wire harness condition (Power Source Circuit)

      • Wire harness condition (GND circuit)

    7. Turn the power switch off.

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

    9. B006HSPC07
      *a

      Front view of wire harness connector

      (to Battery ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      t14-9(GND) - Body ground Power switch off Below 1 Ω
      t14-29(GND1) - Body ground Power switch off Below 1 Ω
      t14-53(GND2) - Body ground Power switch off Below 1 Ω

    10. Reconnect the t14 battery ECU assembly connector.

    11. Install the upper hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT)

    OK

  3. CHECK HYBRID VEHICLE CONTROL ECU

    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. Remove the upper hybrid battery cover sub-assembly.

    3. Disconnect the t14 battery ECU assembly connector.

    4. B006HSPC09
      *a

      Front view of wire harness connector

      (to Battery ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      t14-5(CA1H) - t14-6(CA1L) Power switch off 108 to 132 Ω

    5. Reconnect the t14 battery ECU assembly connector.

    6. Install the upper hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY ECU ASSEMBLY Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY ECU ASSEMBLY)

    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 I2 hybrid vehicle control ECU connector.

      Note


      • Before disconnecting the connector, check that it is not loose or disconnected.

      • Check that each connector between the hybrid vehicle control ECU and battery ECU assembly is not loose or disconnected.

    3. Disconnect the N74 Electric vehicle charger assembly connector.

    4. Disconnect the N73 solar energy control unit connector. (w/ Solar Charging System)

    5. Disconnect the N71 and N72 solar energy control unit connectors. (w/ Solar Charging System)

    6. Remove the upper hybrid battery cover sub-assembly.

    7. Disconnect the t14 battery ECU assembly connector.

      Note


      • Before disconnecting the connector, check that it is not loose or disconnected.

      • Check the terminals of the connector for deformation and corrosion.

    8. B006IZGC01
      *a

      Front view of wire harness connector

      (to Battery ECU Assembly)
      *b

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      t14-5(CA1H) - I2-9(CA4H) Power switch off Below 1 Ω
      t14-6(CA1L) - I2-22(CA4L) Power switch off Below 1 Ω
      I2-9(CA4H) - Other terminals and body ground Power switch off 10 kΩ or higher
      I2-22(CA4L) - Other terminals and body ground Power switch off 10 kΩ or higher

      Note

      Make sure that each connector between the battery ECU assembly and hybrid vehicle control ECU is not loose or disconnected and its terminals are not deformed or corroded.

    9. Reconnect the t14 battery ECU assembly connector.

    10. Install the upper hybrid battery cover sub-assembly.

    11. Reconnect the N71 and N72 solar energy control unit connectors. (w/ Solar Charging System)

    12. Reconnect the N73 solar energy control unit connector. (w/ Solar Charging System)

    13. Reconnect the N74 Electric vehicle charger assembly connector.

    14. Reconnect the I2 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR