THEFT DETERRENT SYSTEM Improper Operation

DESCRIPTION

When the theft deterrent system operates by itself, it could be due to something such as a short circuit in the courtesy light switch of any of the doors or the hood causing a signal to be sent in error.

Tech Tips

Preconditions for Arming Preparation:


  • The power switch is off and all the doors and the hood are closed and all doors are locked by wireless operation or entry operation.

WIRING DIAGRAM

B004AQ8E07
*a Hood Lock Assembly (Engine Hood Courtesy Switch)
*b Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note


  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

  • The theft deterrent system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the theft deterrent system after confirming that the communication systems are functioning properly.

    Click here

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

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

  • If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read out and saved, the operation history information could be lost.

  • The function "Read operation history" uses the current system time setting inside the GTS and the time counter inside the controlling ECU to calculate the timings shown in the operation history. For this reason, before reading out the operation history, first make sure that the GTS system clock is accurately set to the current time.

PROCEDURE


  1. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CONFIRMATION

    Tech Tips


    • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.

    • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

    • The following 5 items are important points in the problem analysis:

      What? Vehicle model, system name
      When? Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time
      Where? Whether the problem occurs at a specific location
      Under what conditions? Whether the doors were locked or unlocked, whether the power switch was on (READY), whether the hybrid control system was starting
      How did it happen? Problem symptoms*

      • *: Be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem, and then check for DTCs.

    Result
    Proceed to
    NEXT

    NEXT

  2. CHECK THEFT DETERRENT SYSTEM OPERATION HISTORY


    1. Use the GTS to check the theft deterrent system operation history around the time that the malfunction reported by the customer occurred, based on the contents of the customer interview and the last recorded theft deterrent system operation history around the time that the problem is reported to have occurred.


      1. On the GTS screen, enter the following menus: Body / Main Body / Utility / Operation History Analysis. According to the display on the GTS, read the operation history.

        Click here

      2. Check that there is theft deterrent system operation history as reported by the customer.

        Click here

        Tech Tips

        Based on the displayed operation history, perform vehicle-side inspection, and perform repairs if a problem is found. If the vehicle has no malfunction, interview the customer about possible causes such as "the driver" and "environmental / other than the driver".

      Result
      Result Proceed to
      There is operational history around the time that the customer reported the malfunction to have occurred, but the malfunction could not be identified even by following the instructions to inspect the relevant areas A
      There is operational history around the time that the customer reported the malfunction to have occurred, and by following the instructions to inspect the relevant areas, the malfunction was identified B
      There is no operational history around the time that the customer reported the malfunction to have occurred. C

    B

    INTERVIEW THE CUSTOMER Click here

    C

    END

    A

  3. CHECK SECURITY INDICATOR LIGHT OPERATION


    1. When the theft deterrent system is in arming preparation state, check that the security indicator light is illuminated.

      Click here

    2. When the theft deterrent system is in armed state, check that the security indicator light blinks.

      Click here

      Tech Tips

      State of Theft Deterrent System Contents Security Indicator Light Condition
      Disarmed state (1), (2) Theft deterrent system is unset.

      • Off (Immobiliser function unset)

      • Blinking (Immobiliser function set)
      Arming preparation state

      Standby period after theft deterrent system set conditions are met but before theft deterrent system is actually set (approximately 30 seconds).

      (Theft detection not performed)

      		 On
      Armed state

      Theft deterrent system is unset.

      (Theft detection is possible)

      		 Blinking (Immobiliser function set)
      Alarm sounding state

      Theft attempt is detected, and alarm is sounded using turn signal light, security horn assembly and vehicle horn.

      (Alarm sounds for 27.5 seconds)

      		 On
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER PROBLEM Click here

    OK

  4. READ VALUE USING GTS (ACC SW, IG SW)


    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 / Main Body / Data List.

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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ACC SW Power switch ON or OFF

      ON: Power switch on (ACC) or on (IG)

      OFF: Power switch off

      		 "ON" is also displayed for this item when the power switch is on (IG).
      IG SW Power switch ON or OFF

      ON: Power switch on (IG)

      OFF: Power switch off or on (ACC)

      		 "OFF" is also displayed for this item when the power switch is on (ACC).

      Body Electrical > Main Body > Data List
      Tester Display
      ACC SW
      IG SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  5. READ VALUE USING GTS (FR Door Lock Pos, FL Door Lock Pos)


    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 / Main Body / Data List.

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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Lock Pos Front door RH unlock detection switch LOCK or UNLOCK

      LOCK: Front door RH locked

      UNLOCK: Front door RH unlocked

      		 -
      FL Door Lock Pos Front door LH unlock detection switch LOCK or UNLOCK

      LOCK: Front door LH locked

      UNLOCK: Front door LH unlocked

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Lock Pos
      FL Door Lock Pos
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  6. READ VALUE USING GTS (FR Door Courtesy SW, FL Door Courtesy SW)


    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 / Main Body / Data List.

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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Courtesy SW Courtesy light switch RH ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

      		 -
      FL Door Courtesy SW Courtesy light switch LH ON or OFF

      ON: Front door LH open

      OFF: Front door LH closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Courtesy SW
      FL Door Courtesy SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  7. READ VALUE USING GTS (Luggage Courtesy SW)


    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 / Main Body / Data List.

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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Luggage Courtesy SW Luggage compartment door courtesy switch ON or OFF

      ON: Luggage compartment door open

      OFF: Luggage compartment door closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Luggage Courtesy SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  8. READ VALUE USING GTS (Hood Courtesy SW)


    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 / Main Body / Data List.

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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Hood Courtesy SW Engine hood courtesy switch ON or OFF

      ON: Engine hood open

      OFF: Engine hood closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Hood Courtesy SW
      OK
      The GTS display changes correctly in response to the hood lock assembly (engine hood courtesy switch) status.
      Result
      Proceed to
      OK
      NG

    OK

    CHECK INTERMITTENT PROBLEMS Click here

    NG

  9. INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)


    1. Remove the hood lock assembly (engine hood courtesy switch).

      Click here

    2. Inspect the hood lock assembly (engine hood courtesy switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH) Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (HOOD LOCK ASSEMBLY [ENGINE HOOD COURTESY SWITCH] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)


    1. Disconnect the A5 hood lock assembly (engine hood courtesy switch) connector.

    2. Disconnect the P7 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
      P7-30 (HCTY) - A5-2 Always Below 1 Ω
      P7-30 (HCTY) or A5-2 - Other terminals and body ground Always 10 kΩ or higher
      A5-1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. INTERVIEW THE CUSTOMER


    1. If the phenomenon could not be confirmed or reproduced, after explaining this to the customer, also explain the history of input signals from the electrical key transmitter sub-assembly (electronic key) for the relevant date/time in the operation history.

      Click here

      Standard
      Cause was identified
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    CHECK INTERMITTENT PROBLEMS Click here