ENTRY AND START SYSTEM, Diagnostic DTC:B2275

DTC Code DTC Name
B2275 STSW Monitor Malfunction

DESCRIPTION

This DTC is output when the hybrid control system start request signal circuit inside the main body ECU is open or shorted.

DTC Code Detection Condition Trouble Area
B2275 Hybrid control system start request signal circuit inside main body ECU or other related circuit is malfunctioning

  • Main body ECU


  • Hybrid vehicle control ECU


  • Harness or connector

WIRING DIAGRAM

A000VC8E03
*a Hybrid Vehicle Control ECU
*b Main Body ECU (Driver Side Junction Block Assembly)

PROCEDURE


  1. CHECK WHETHER DTC OUTPUT RECURS


    1. Clear the DTCs Click here.

    2. Depress the brake pedal with the power switch ON (IG), wait at least 15 seconds, and check whether DTC B2275 recurs.

      Result
      Display (DTC output) Proceed to
      B2275 A
      No DTC output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - HYBRID VEHICLE CONTROL ECU)

    A000X02E02
    *1 Front view of wire harness connector: (to Main Body ECU)
    *2 Front view of wire harness connector: (to Hybrid Vehicle Control ECU)

    1. Disconnect the A68 main body ECU connector.

    2. Disconnect the A78 hybrid vehicle control ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A68-4 (STSW) - A78-28 (ST2) Always Below 1 Ω
      A68-4 (STSW) or A78-28 (ST2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MAIN BODY ECU

    A000Z8UE03
    *1 Component with harness connected: (Main Body ECU)

    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 power switch is turned ON (READY).

      Standard voltage
      Tester Connection Condition Specified Condition
      A68-4 (STSW) - Body ground Brake pedal depressed with shift lever in P, power switch pushed once 11 to 14 V

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPLACE MAIN BODY ECU