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PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2036

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DTC Code DTC Name
B2036 Power Supply Relay Malfunction Open
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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
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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.

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PROCEDURE


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    INSPECT SEAT BELT CONTROL ECU (+B TERMINAL VOLTAGE)


    1. A015DJ4E02

      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 E41 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
      E41-7 (+B) - Body ground Always 11 to 14 V
      Table 1. Result
      Result Proceed to

      OK

      (for LHD)

      		 A

      OK

      (for LHD)

      		 B
      NG C

    5. Disconnect the negative (-) battery terminal.

    6. Reconnect the E41 seat belt control ECU connector.

    7. Connect the negative (-) battery terminal.


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    REPLACE SEAT BELT CONTROL ECUClick here

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    REPLACE SEAT BELT CONTROL ECUClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR