POWER TRUNK LID SYSTEM Power Trunk Lid does not Operate

DESCRIPTION

The main body ECU (multiplex network body ECU) continuously monitors the luggage door opening cancel switch assembly. When the luggage door opening cancel switch assembly is OFF, a luggage door opening switch signal is sent to the luggage closer motor assembly from the main body ECU (multiplex network body ECU) via CAN communication. This actuates the power trunk opener operation, which opens the luggage compartment door. When the door control switch is on, the luggage closer motor assembly actuates the power trunk closer operation. When the electrical key transmitter sub-assembly is held or all doors are unlocked and the electrical key transmitter sub-assembly is not held, and the luggage electrical key switch is on or the luggage door open switch on electrical key transmitter sub-assembly switch is pressed, the luggage closer motor assembly actuates the power trunk lid opener operation.

WIRING DIAGRAM

Refer to the "System Diagram" Click here.

INSPECTION PROCEDURE

Note


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

  • When using the GTS with the power switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-seconds intervals until communication between the GTS and vehicle begins.

  • If the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly) is replaced, refer to Service Bulletin.

Tech Tips

Since the power trunk lid system has functions that use LIN communication system and CAN communication system, first confirm that there is no malfunction in the communication system by inspecting the LIN communication and CAN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

PROCEDURE


  1. CHECK POWER TRUNK LID SYSTEM


    1. Check the power trunk lid system Click here.

      Result
      Result Proceed to
      There is a malfunction when only the luggage door opening cancel switch assembly or luggage door opening switch is operated. A
      There is a malfunction when only the door control switch is operated. B
      There is a malfunction when only the luggage electrical key switch is operated (electrical key transmitter sub-assembly is held) (w/ Entry Function). C
      There is a malfunction when only the luggage electrical key switch is operated (all doors are unlocked and the electrical key transmitter sub-assembly is not held). D
      There is a malfunction when only the electrical key transmitter sub-assembly is operated. E

    B

    READ VALUE USING GTS (PBD CLOSE SW) Click here

    C

    READ VALUE USING GTS (TR/B-DOOR UNLOCK SW) Click here

    D

    CHECK HARNESS AND CONNECTOR (LUGGAGE ELECTRICAL KEY SWITCH - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND) Click here

    E

    CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    A

  2. READ VALUE USING GTS (TRUNK MAIN SW)


    1. Check the Data List for proper functioning of the luggage door opening cancel switch assembly Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Trunk Main SW Luggage compartment door opener cancel switch signal / ON or OFF

      ON: Luggage compartment door opener cancel switch is on

      OFF: Luggage compartment door opener cancel switch is off

      		 When this item is abnormal, there is a problem with the luggage door opening cancel switch assembly or related parts.
      OK
      On GTS screen, each item changes between ON and OFF as shown in above chart.

    NG

    INSPECT LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY Click here

    OK

  3. READ VALUE USING GTS (TRUNK/BDOOR OPEN SW)


    1. Check the Data List for proper functioning of the luggage door opening cancel switch assembly Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Trunk/BDoor Open SW Luggage compartment door opener switch signal / ON or OFF

      ON: Luggage compartment door opener switch is on

      OFF: Luggage compartment door opener switch is off

      		 When this item is abnormal, there is a problem with the luggage door opening switch assembly or related parts.
      OK
      On GTS screen, each item changes between ON and OFF as shown in above chart.

    NG

    INSPECT LUGGAGE DOOR OPENING SWITCH ASSEMBLY Click here

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  4. INSPECT LUGGAGE DOOR OPENING SWITCH ASSEMBLY


    1. Remove the luggage door opening switch assembly Click here.

    2. Insect the luggage door opening switch assembly Click here.


    NG

    REPLACE LUGGAGE DOOR OPENING SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (LUGGAGE DOOR OPENING SWITCH - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the N2 luggage door opening cancel switch assembly connector.

    2. Disconnect the N13 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N2-3 (B) - N13-8 (TSW) Always Below 1 Ω
      N2-4 (L) - Body ground Always Below 1 Ω
      N2-3 (B) or N13-8 (TSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  6. INSPECT LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY


    1. Remove the luggage door opening cancel switch assembly Click here.

    2. Inspect the luggage door opening cancel switch assembly Click here.


    NG

    REPLACE LUGGAGE DOOR OPENING CANCEL SWITCH ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (LUGGAGE DOOR OPENING CANCEL SWITCH - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the N84 luggage door opening cancel switch assembly connector.

    2. Disconnect the N13 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N84-2 (B) - N13-5 (TMSW) Always Below 1 Ω
      N84-1 (L) - Body ground Always Below 1 Ω
      N84-2 (B) or N13-5 (TMSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  8. READ VALUE USING GTS (PBD CLOSE SW)


    1. Check the Data List for proper functioning of the door control switch Click here.

      Back Door
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Close SW Door control switch signal / ON or OFF

      ON: Door control switch is on

      OFF: Door control switch is off

      		 When this item is abnormal, there is a problem with the door control switch or related parts.
      OK
      On GTS screen, each item changes between ON and OFF as shown in above chart.

    NG

    INSPECT DOOR CONTROL SWITCH Click here

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

  9. INSPECT DOOR CONTROL SWITCH


    1. Remove the door control switch Click here.

    2. Inspect the door control switch Click here.


    NG

    REPLACE DOOR CONTROL SWITCH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH - LUGGAGE CLOSER MOTOR AND BODY GROUND)


    1. Disconnect the a2 door control switch connector.

    2. Disconnect the U33 luggage closer motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      a2-4 (CLS) - U33-4 (LDDN) Always Below 1 Ω
      a2-3 (E) - Body ground Always Below 1 Ω
      a2-4 (CLS) or U33-4 (LDDN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

  11. READ VALUE USING GTS (TR/B-DOOR UNLOCK SW)


    1. Check the Data List for proper functioning of the luggage electrical key switch Click here.

      Entry & Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Tr/B-Door Unlock SW Luggage electrical key switch / ON or OFF

      ON: Luggage electrical key switch pushed

      OFF: Luggage electrical key switch not pushed

      		 When this item is abnormal, there is a problem with the luggage electrical key switch of the luggage door lock assembly or related parts.
      OK
      On GTS screen, each item changes between ON and OFF as shown in above chart.

    NG

    INSPECT LUGGAGE ELECTRICAL KEY SWITCH Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  12. INSPECT LUGGAGE ELECTRICAL KEY SWITCH


    1. Remove the luggage electrical key switch Click here.

    2. Inspect the luggage electrical key switch Click here.


    NG

    REPLACE LUGGAGE ELECTRICAL KEY SWITCH Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (LUGGAGE ELECTRICAL KEY SWITCH - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND BODY GROUND)


    1. Disconnect the a7 luggage electrical key switch connector.

    2. Disconnect the N98 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      a7-2 (UL) - N98-22 (TSW5) Always Below 1 Ω
      a7-1 (E) - Body ground Always Below 1 Ω
      a7-2 (UL) or N98-22 (TSW5) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  14. READ VALUE USING GTS (TRUNK LINK WITH DOOR LOCK)


    1. Using the GTS, read the Data List Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Trunk Link with Door Lock Luggage compartment door lock function / ON or OFF Customized value displayed -
      Result
      Result Proceed to
      Luggage compartment door lock function is ON. A
      Luggage compartment door lock function is OFF. B

    B

    PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters) Click here

    A

    GO TO LIGHTING SYSTEM (Door Unlock Detection Switch Circuit) Click here

  15. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Check if there are any other registered electrical key transmitter sub-assemblies.

      Result
      Result Proceed to
      There are no other registered electrical key transmitter sub-assemblies. A
      There is another registered electrical key transmitter sub-assemblies. B

    B

    CHECK POWER TRUNK LID SYSTEM Click here

    A

  16. ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)


    1. Register a new electrical key transmitter sub-assembly.


    NEXT

  17. CHECK POWER TRUNK LID SYSTEM


    1. Using another registered electrical key transmitter sub-assembly, check if a power trunk lid system open/close operation can be performed normally.

      OK
      The operation can be performed normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)