ENTRY AND START SYSTEM (for Start Function), Diagnostic DTC:B2275

DTC Code DTC Name
B2275 STSW Monitor Malfunction

DESCRIPTION

This DTC is stored when the engine start request signal circuit inside the main body ECU is open or shorted.

DTC Code Detection Condition Trouble Area
B2275 The engine start request signal circuit inside the main body ECU or other related circuit is malfunctioning.

  • Main body ECU


  • ECM


  • Harness or connector

WIRING DIAGRAM

A01ESLKE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK WHETHER DTC OUTPUT RECURS


    1. Clear the DTCs Click here.

    2. Depress the brake pedal with the engine switch on (IG), wait at least 15 seconds, and check whether DTC B2275 is output.

      Result
      Result Proceed to
      DTC B2275 output A
      No DTC output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

    A01ER61E01

    1. Disconnect the E4 main body ECU connector.

    2. Disconnect the A38 ECM connector (for LHD).

    3. Disconnect the A53 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - A38-14 (STSW) Always Below 1 Ω
      E4-4 (STSW) or A38-14 (STSW) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - A53-14 (STSW) Always Below 1 Ω
      E4-4 (STSW) or A53-14 (STSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A01EOXME01

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

      Tech Tips

      The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - Body ground Brake pedal depressed with shift lever in P, engine switch pushed once 11 to 14 V
      Result
      Result Proceed to
      OK (for 3UR-FE) A
      OK (for 1UR-FE) B
      NG C

    B

    REPLACE ECM Click here

    C

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A

    REPLACE ECM Click here