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 starter circuit inside the certification ECU (smart key ECU assembly).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2275 STSW Monitor Malfunction Certification ECU (smart key ECU assembly) internal HV activation request output circuit malfunction or external circuit malfunction (1-trip detection logic*)

  • AM2 fuse

  • Certification ECU (smart key ECU assembly)

  • Hybrid vehicle control ECU assembly

  • Wire harness or connector

    DTC Output Confirmation Operation:

  • 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.

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Related Data List and Active Test Items
DTC No. Data List and Active Test
B2275

    Power Source Control

  • Starter Request Signal

WIRING DIAGRAM

A00238DE03
*1 from Auxiliary Battery
*2 Certification ECU (Smart Key ECU Assembly)
*3 Hybrid Vehicle Control ECU Assembly

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 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 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 uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly) or certification ECU (smart key ECU assembly), refer to push-button start Precaution.

    Click here

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

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

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.

PROCEDURE


  1. CHECK FOR DTC


    1. Turn the power switch on (IG) and wait 25 seconds.

    2. Using the GTS, check for power management control ECU DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      OK
      DTC B2285 is not output simultaneously.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DTC B2285 Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A002177C52
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the K137 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K137-10 (+B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the K137 certification ECU (smart key ECU assembly) connector.

    2. A002177C53
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K137-11 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    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 A83 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the K141 hybrid vehicle control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specification Condition
      A83-12 (ST2) - K141-9 (ST2) Always Below 1 Ω
      A83-12 (ST2) or K141-9 (ST2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the A83 certification ECU (smart key ECU assembly) connector.

    2. Reconnect the K141 hybrid vehicle control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specification Condition
      A83-12 (ST2) - Body ground With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released 9 V or higher → 1 V or less
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)