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 No. 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

  • Seat belt control ECU

WIRING DIAGRAM

A005F05E04
*a from Auxiliary Battery
*b Instrument Panel Junction Block Assembly
*c Seat Belt Control ECU

CAUTION / NOTICE / HINT

Note


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

  • 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 Click here.

PROCEDURE


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


    1. A005BPBE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Seat Belt Control ECU)

      Disconnect the L2 seat belt control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L2-7 (+B) - Body ground Power switch off 11 to 14 V

    OK

    REPLACE SEAT BELT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT)