ENTRY AND START SYSTEM(for Start Function) Power Source Mode does not Change to ON (ACC)

DTC Code DTC Name
Power Source Mode does not Change to ON (ACC)

DESCRIPTION

If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.

Table 1. Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

Power source mode does not change to on (ACC) but does change to on (IG)

  • Power Source Control

  • Power Supply Condition

  • ACC Relay Monitor

  • Starting Control

  • Ignition

WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the engine 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 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 hereClick here

  • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.

  • If the entry and start system (for Start Function) has been canceled, enable the system before performing troubleshooting.

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to entry and start system (for Start Function) Precaution.

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  • After completing repairs, confirm that the problem does not recur.

Tip:

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

PROCEDURE

  1. CHECK FOR DTC

    1. Using the GTS, check for certification ECU (smart key ECU assembly) DTCs.

      Body Electrical > Power Source Control > Trouble Codes

      Body Electrical > Entry&Start > Trouble Codes

      Body Electrical > Starting Control > Trouble Codes

    Result

    Result

    Proceed to

    DTCs are not output

    A

    Entry and start system (for Start Function) DTCs are output

    B
    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    Click hereClick here

    A

  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    Click here

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    Click here

    Result

    Proceed to

    OK

    NG
    OK

    END (TEMPORARY CONNECTION FAILURE IS SUSPECTED)

    Click hereClick hereClick here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)