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

DESCRIPTION

If the power 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.

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

WIRING DIAGRAM

Figure 1. for LHD:

B004XCEE15

Figure 2. for RHD:

B004XITE15

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.

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

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

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

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

PROCEDURE


  1. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start, Power Source Control / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes
      Body Electrical > Power Source 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

  2. CHECK VEHICLE CONDITION


    1. Check vehicle condition.

      Result
      Proceed to
      for LHD
      for RHD

    for RHD

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    for LHD

  3. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. B004TNWC15
      *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
      G71-16 (ACCD) - Body ground Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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


    1. Disconnect the G71 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 5D and 5K 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
      G71-16 (ACCD) - 5D-17 Always Below 1 Ω
      5D-6 - Body ground Always Below 1 Ω
      G71-16 (ACCD) or 5D-17 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      5K-1 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC D RELAY)


    1. Remove the driver side junction block assembly.

      Click here

    2. Reconnect the driver side junction block assembly connectors.

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

      B004S7QC18
      *a

      Component with harness connected

      (Driver Side Junction Block Assembly)

      		 - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      5D-22 - Body ground Power switch on (ACC) 11 to 14 V
      5A-18 - Body ground Power switch on (ACC) 8.5 to 14 V
      5H-32 - Body ground Power switch on (ACC) 8.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK ASSEMBLY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)


    1. Disconnect the 5A driver side junction block assembly connector.

    2. Disconnect the 5D, 4A and 4K passenger 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
      5A-18 - 4D-26 Always Below 1 Ω
      4A-9 - Body ground Always Below 1 Ω
      5A-18 or 4D-26 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4K-1 - Body ground Power switch off 11 to 14 V

    5. Reconnect the 3A driver side junction block assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (ACC P RELAY)


    1. Remove the passenger side junction block assembly.

      Click here

    2. Reconnect the passenger side junction block assembly connectors.

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

      B004U0LC07
      *a

      Component with harness connected

      (Passenger Side Junction Block Assembly)

      		 - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4D-15 - Body ground Power switch on (ACC) 11o 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - LUG-ACC RELAY AND BODY GROUND)


    1. Disconnect the 5H driver side junction block assembly connector.

    2. Remove the LUG-ACC relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5H-32 - LUG-ACC relay installation terminal 2 Always Below 1 Ω
      LUG-ACC relay installation terminal 1 - Body ground Always Below 1 Ω
      5H-32 or LUG-ACC relay installation terminal 2 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      LUG-ACC relay installation terminal 3 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT LUG-ACC RELAY


    1. B004V52C15
      *1 LUG-ACC Relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE LUG-ACC RELAY

  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. B004TNWC15
      *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
      G71-16 (ACCD) - Body ground Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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


    1. Disconnect the G71 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 5D and 5K 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
      G71-16 (ACCD) - 5D-17 Always Below 1 Ω
      5D-7 - Body ground Always Below 1 Ω
      G71-16 (ACCD) or 5D-18 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      5K-1 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC D RELAY)


    1. Remove the driver side junction block assembly.

      Click here

    2. Reconnect the driver side junction block assembly connectors.

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

      B004SIDC11
      *a

      Component with harness connected

      (Driver Side Junction Block Assembly)

      		 - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      5D-43 - Body ground Power switch on (ACC) 11 to 14 V
      5A-21 - Body ground Power switch on (ACC) 8.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK ASSEMBLY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 4D, 4A and 4K passenger side junction block assembly connectors.

    2. Disconnect the 5A driver side junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5A-21 - 4D-32 Always Below 1 Ω
      4A-9 - Body ground Always Below 1 Ω
      5A-21 or 4D-32 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4K-1 - Body ground Power switch off 11 to 14 V

    5. Reconnect the 3A driver side junction block assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (ACC P RELAY)


    1. Remove the passenger side junction block assembly.

      Click here

    2. Reconnect the passenger side junction block assembly connectors.

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

      B004SDRC15
      *a

      Component with harness connected

      (Passenger Side Junction Block Assembly)

      		 - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4D-28 - Body ground Power switch on (ACC) 11 to 14 V
      4H-21 - Body ground Power switch on (ACC) 8.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK ASSEMBLY - LUG-ACC RELAY)


    1. Disconnect the 4H passenger side junction block assembly connector.

    2. Remove the LUG-ACC relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4H-21 - LUG-ACC relay installation terminal 2 Always Below 1 Ω
      LUG-ACC relay installation terminal 1 - Body ground Always Below 1 Ω
      4H-21 or LUG-ACC relay installation terminal 2 - Other terminals and body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      LUG-ACC relay installation terminal 3 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. INSPECT LUG-ACC RELAY


    1. B004V52C15
      *1 LUG-ACC Relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE LUG-ACC RELAY