PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2036

DTC Code DTC Name
B2036 Power Supply Relay Malfunction Open

DESCRIPTION

If the seat belt control ECU judges that there is a malfunction in its internal circuit as a result of self-diagnosis, or if the power source voltage (+B) is not input to the seat belt control ECU, this DTC will be stored.

DTC Code DTC Detection Condition Trouble Area
B2036

  • Malfunction in seat belt control ECU

  • Power source voltage (+B) is not input to the seat belt control ECU.

  • Harness or connector

  • Fuse

  • Seat belt control ECU

WIRING DIAGRAM

A001BW0E08
*1 from Battery
*2 Seat Belt Control ECU

CAUTION / NOTICE / HINT

CAUTION:

The pretensioner is built into the front seat outer belt assembly. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner.

Note

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

PROCEDURE


  1. INSPECT SEAT BELT CONTROL ECU (+B TERMINAL VOLTAGE)


    1. A001BQ7E01
      *1 Front view of wire harness connector: (to Seat Belt Control ECU)

      Disconnect the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    2. Disconnect the S45 connector of the seat belt control ECU.

    3. Connect the negative (-) battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S45-7 (+B) - Body ground Always 11 to 14 V

    5. Disconnect the negative (-) battery terminal.

    6. Reconnect the S45 seat belt control ECU connector.

    7. Connect the negative (-) battery terminal.


    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR