ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2271

DTC Code DTC Name
B2271 Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction in the IG circuit or IG hold circuit of the certification ECU (smart key ECU assembly) is detected.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2271 Ignition Hold Monitor Malfunction

When either of the following conditions is met (1-trip detection logic*1):


  • The IG circuit of the certification ECU (smart key ECU assembly) is malfunctioning.*2

  • The IG hold circuit of the certification ECU (smart key ECU assembly) is malfunctioning.*3

  • Certification ECU (smart key ECU assembly)

  • Harness or connector

    DTC Output Confirmation Operation:

  • Turn the power switch on (IG).

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The power switch cannot be turned on (IG) (the hybrid control system cannot be started). The power source mode cannot be changed to on (IG).
Related Data List and Active Test Items
DTC No. Data List and Active Test
B2271

    Power Source Control

  • Latch Circuit

  • IG Relay Monitor (Inside)

WIRING DIAGRAM

B004BH3E06
*1 Each IG Relay
*2 Certification ECU (Smart Key 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. 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 entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.

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

PROCEDURE


  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. B004C79C86
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P66-17 (IG1D) - Body ground Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    END (TEMPORARY CONNECTION FAILURE IS SUSPECTED) Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)