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

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

DESCRIPTION

If any of the following operations are performed, the certification ECU (smart key ECU assembly) receives a signal, and changes the power source mode.

  • With the electrical key transmitter sub-assembly in the cabin, the engine switch is pressed.

  • When the transmitter battery of the electrical key transmitter sub-assembly is depleted, the brake pedal*1 or clutch pedal*2 is depressed with the electrical key transmitter sub-assembly held near the engine switch.

  • When the entry and start system has been canceled, the brake pedal*1 or clutch pedal*2 is depressed with the electrical key transmitter sub-assembly held near the engine switch.

  • *1: for Multi-Mode Manual Transaxle

  • *2: for Manual Transaxle

Table 1. Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

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

  • Power Source Control

  • Start Switch1

  • Start Switch2

  • IG Relay Monitor (Inside)

  • ACC Relay Monitor

  • IG Relay Monitor (Outside)

  • Latch Circuit

  • Power Supply Condition

  • Starting Control

  • Ignition

WIRING DIAGRAM

B367017E02

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 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.

    Click here

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

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

    Click here

  • 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 ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    1. Press a switch of the electrical key transmitter sub-assembly.

      OK

      The electrical key transmitter sub-assembly LED illuminates.

    Result

    Proceed to

    OK

    NG
    NG

    INSPECT TRANSMITTER BATTERYClick here

    OK

  2. READ VALUE USING GTS (KEY LOW BATTERY)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Data List.

    5. Read the Data List according to the display on the GTS.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Key Low Battery

      Transmitter battery depleted

      No or Yes

      No: Transmitter battery not depleted

      Yes: Transmitter battery depleted

      The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays Yes for the Data List item Key Low Battery when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), Yes may be displayed even if the transmitter battery is new).

      Body Electrical > Entry&Start > Data List

      Tester Display

      Key Low Battery

      OK

      "No" is displayed on the GTS screen.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE TRANSMITTER BATTERY

    Click here

    OK

  3. CHECK POWER SOURCE MODE

    1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.

    2. Move the shift lever to N.*1

    3. Press the engine switch with the brake pedal*1 or clutch pedal*2 released and check that the power source mode changes.

      • *1: for Multi-Mode Manual Transaxle

      • *2: for Manual Transaxle

    Result

    Result

    Proceed to

    The power source mode changes

    A

    The power source mode does not change

    B
    A

    END (AFFECTED BY WAVE INTERFERENCE)

    B

  4. CHECK ENTRY AND START SYSTEM (for Start Function)

    1. Remove the transmitter battery from the electrical key transmitter sub-assembly.

    2. B361571C02

      *1

      Engine Switch

      *2

      Electrical Key Transmitter Sub-assembly

      With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

      OK

      The power source mode changes.

      Tip:

      If the power source mode changes, the cabin verification is malfunctioning.

    Result

    Result

    Proceed to

    The power source mode does not change

    A

    The power source mode changes

    B
    B

    READ VALUE USING GTS (START SWITCH1, START SWITCH2)Click here

    A

  5. 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 here

    A

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  7. CHECK HARNESS AND CONNECTOR (GROUND)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT IG1 RELAY

    1. Remove the IG1 relay.

    2. B372350E01

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - 5

      Battery voltage applied to terminals 1 and 2

      Below 1 Ω

      Battery voltage not applied to terminals 1 and 2

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE IG1 RELAY

    OK

  9. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IG1 RELAY)

    1. Disconnect the E49 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the IG1 relay connector.

    3. Disconnect the IG2 relay connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E49-20 (IG1D) - IG1 Relay holder terminal-1

      Always

      Below 1 Ω

      E49-20 (IG1D) or IG1 Relay holder terminal-1 - Body ground

      Always

      10 kΩ or higher

      IG1 Relay holder terminal-2 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (BATTERY - IG1 RELAY)

    1. Remove the IG1 relay.

    2. B364771C01

      *1

      Center Relay Block

      *a

      IG1 Relay holder

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      IG1 Relay holder terminal-3 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT IG2 RELAY

    1. Remove the IG2 relay.

    2. B372350E01

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - 5

      Battery voltage applied to terminals 1 and 2

      Below 1 Ω

      Battery voltage not applied to terminals 1 and 2

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE IG2 RELAY

    OK

  12. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IG2 RELAY)

    1. Disconnect the E49 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the IG1 relay connector.

    3. Disconnect the IG2 relay connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E49-20 (IG1D) - IG2 Relay holder terminal-1

      Always

      Below 1 Ω

      E49-20 (IG1D) or IG2 Relay holder terminal-1 - Body ground

      Always

      10 kΩ or higher

      IG2 Relay holder terminal-2 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (BATTERY - IG2 RELAY)

    1. Remove the IG2 relay.

    2. B364772C01

      *1

      Center Relay Block

      *a

      IG2 Relay holder

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      IG2 Relay holder terminal-3 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)

    1. Remove the driver side junction block assembly.

      Click here

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

      B342624C06

      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3E-2 - 3J-7

      20°C (68°F)

      163 to 238 Ω

      3A-1 - 3P-4

      Battery voltage applied to terminals 3E-2 and 3J-7

      Below 1 Ω

      Battery voltage not applied to terminals 3E-2 and 3J-7

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    Click here

    OK

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

    1. Disconnect the E49 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 3E and 3J driver side junction block assembly connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E49-21 (ACCD) - 3E-2

      Always

      Below 1 Ω

      E49-21 (ACCD) or 3E-2 - Body ground

      Always

      10 kΩ or higher

      3J-7 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    1. Install the driver side junction block assembly.

      Click here

    2. Reconnect the E49 certification ECU (smart key ECU assembly) connector.

    3. B368778C12

      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      Measure the voltage while confirming the power source mode on the Data List.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Power Supply Condition

      Power supply state

      All OFF, ACC ON, IG ON or ST ON

      All OFF: Engine switch off (ACC and IG)

      ACC ON: Engine switch on (ACC)

      IG ON: Engine switch on (IG)

      ST ON: Sending engine start request signal

      -

      Body Electrical > Power Source Control > Data List

      Tester Display

      Power Supply Condition

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E49-20 (IG1D) - Body ground

      Engine switch off

      1 V or less

      Engine switch on (ACC)

      1 V or less

      Engine switch on (IG)

      9 V or higher

      E49-21 (ACCD) - Body ground

      Engine switch off

      1 V or less

      Engine switch on (IG)

      8.5 V or higher

      Engine switch on (ACC)

      8.5 V or higher

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click here

    NG

  17. READ VALUE USING GTS (START SWITCH1, START SWITCH2)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Power Source Control / Data List.

    5. Read the Data List according to the display on the GTS.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Start Switch1

      Engine switch 1 status

      OFF or ON

      OFF: Engine switch not pressed

      ON: Engine switch pressed

      • If the engine switch is pressed for a short time, the display may not change.

      • Use this item to determine whether the engine switch input signal is malfunctioning.

      Start Switch2

      Engine switch 2 status

      OFF or ON

      OFF: Engine switch not pressed

      ON: Engine switch pressed

      • Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal.

      • Behaves the same way as engine switch 1.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Start Switch1

      Start Switch2

      OK

      The GTS display changes correctly in response to the engine switch operation.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    INSPECT ENGINE SWITCHClick here

  18. INSPECT TRANSMITTER BATTERY

    1. Inspect the transmitter battery.

      Click here

      Note:

      Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    NG

    REPLACE TRANSMITTER BATTERY

    Click here

  19. INSPECT ENGINE SWITCH

    1. Remove the engine switch.

      Click here

    2. Inspect the engine switch.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE ENGINE SWITCH

    Click here

    OK

  20. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH)

    1. Disconnect the E49 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the E51 engine switch connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E49-18 (SSW1) - E51-5 (SS1)

      Always

      Below 1 Ω

      E49-18 (SSW1) or E51-5 (SS1) - Body ground

      Always

      10 kΩ or higher

      E49-16 (SSW2) - E51-1 (SS2)

      Always

      Below 1 Ω

      E49-16 (SSW2) or E51-1 (SS2) - Body ground

      Always

      10 kΩ or higher

      E49-24 (AGND) - E51-6 (AGND)

      Always

      Below 1 Ω

      E49-24 (AGND) or E51-6 (AGND) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR