ELECTRIC POWER CONTROL SYSTEM, Diagnostic DTC:B1011

DTC Code DTC Name
B1011 Battery Power Supply Control Circuit

DESCRIPTION


Tech Tips

In some cases, none of the functions of the main body ECU (network gateway ECU) may function when B1012 is stored together with B1011.

DTC No. DTC Detection Condition Trouble Area
B1011 When BMPX voltage is 8.3 V or less, or 16.7 V or more (BMPX circuit malfunction)

  • Main body ECU (network gateway ECU)

  • Instrument panel junction block assembly

  • Harness or connector

WIRING DIAGRAM

A004H2CE05
*a from Battery
*b BMPX
*c Instrument Panel Junction Block Assembly
*d Main Body ECU (Network Gateway ECU)

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1011 is output A
      DTC is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (BMPX VOLTAGE)


    1. Disconnect the 3C instrument panel junction block assembly connector.

    2. A004KIQE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3C-19 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ECU GROUND)


    1. Disconnect the D6 and A73 main body ECU (network gateway ECU) connector.

    2. Disconnect the 3B instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D6-1 (GND) - Body ground Always Below 1 Ω
      A73-4 (GND) - Body ground Always Below 1 Ω
      3B-18 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

    2. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.

      A004JT3E03
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3C-19 - MB-32 (BMPX) Always Below 1 Ω
      3B-18 - MB-11 (GND) Always Below 1 Ω

    OK

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here