PUSH-BUTTON START, Diagnostic DTC:B2275

DTC Code DTC Name
B2275 STSW Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction is detected in the circuit between terminal ST2 of the certification ECU (smart key ECU assembly) and terminal ST2 of the hybrid vehicle control ECU.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2275 Certification ECU (smart key ECU assembly) internal HV activation request output circuit malfunction (1-trip detection logic*)

  • AM2 fuse

  • Steering lock system

  • Certification ECU (Smart key ECU assembly)

  • Harness or connector

 Turn the power switch on (IG) and wait 10 seconds or more, then start the hybrid control system 3 times.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected

  • The power source mode changes to on (READY) even though the hybrid control system is not started.

  • The power source mode does not change to on (READY) even though the hybrid control system is started.

 -

Tech Tips

Related Data List and Active Test Items
DTC Data List Item Active Test Item
B2275

    Power Source Control

  • Starter Request Signal

 -

WIRING DIAGRAM

A004E8QE09

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The push-button start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the push-button start system precaution Click here.

  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch on (IG).

    3. After 25 seconds have elapsed, check if the DTC has been set again.

      OK
      DTC B2285 is not output.

    NG

    GO TO DTC CHART (DTC B2285) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A004FELE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F88-2 (+B) - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    A004EHSE01
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F88-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - HYBRID VEHICLE CONTROL ECU)


    1. Disconnect the F88 the certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F55 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
      F88-7 (ST2) - F55-9 (ST2) Always Below 1 Ω
      F88-7 (ST2) or F55-9 (ST2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the F88 certification ECU (smart key ECU assembly) connector.

    2. Reconnect the F55 hybrid vehicle control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F88-7 (ST2) - F88-11 (E) Brake pedal depressed, power switch pressed for approx. 3 sec. → power switch released 9 V Higher→ Below 1 V

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)