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

Either of the following conditions is met:


  • 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

A01G4YAE07

INSPECTION PROCEDURE

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. A01G7T7E07
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Seat Belt Control ECU)

      Disconnect the H77 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
      H77-7 (+B) - Body ground Engine switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT)

    OK

    REPLACE SEAT BELT CONTROL ECU Click here