THEFT DETERRENT SYSTEM Some Alarm Functions do not Operate

DESCRIPTION

When the alarm sounds, the following alarm functions operate: the hazard lights flash, and the security horn and vehicle horns sound intermittently.

WIRING DIAGRAM

A01MH2DE01

CAUTION / NOTICE / HINT

Note


  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

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

PROCEDURE


  1. CHECK THEFT DETERRENT SYSTEM OPERATION


    1. Open the driver side window.

    2. Set the theft deterrent system.


      1. Close all doors, the luggage compartment door and hood.

      2. Lock the doors using, wireless operation or entry operation.

      3. Wait for 30 seconds or more.

    3. Unlock the driver door using the door lock knob.

    4. After 30 seconds have elapsed, check that the security indicator light changes from illuminated to flashing.

    5. Check that each alarm component operates correctly.

      Result
      Result Proceed to
      Security horn is not activated A
      Vehicle horn is not activated B
      Hazard lights are not activated C

    B

    CHECK HORN OPERATION Click here

    C

    GO TO LIGHTING SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (SECURITY HORN)


    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 / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Security Horn Security horn assembly OFF/ON -

      Body Electrical > Main Body > Active Test
      Tester Display
      Security Horn
      OK
      The security horn assembly sounds and stops correctly when operated through the GTS.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

  3. INSPECT S-HORN RELAY


    1. Remove the S-HORN relay from the motor compartment relay block LH.

    2. A01MGPDC06
      *1 S-HORN Relay

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

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

    NG

    REPLACE S-HORN RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - S-HORN RELAY)


    1. Remove the S-HORN relay from the motor compartment relay block LH.

    2. A01MJP0C02
      *1 Motor compartment relay block LH

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      1 (S-HORN relay holder) - Body ground Power switch off 11 to 14 V
      5 (S-HORN relay holder) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT SECURITY HORN ASSEMBLY


    1. Remove the security horn assembly.

      for LHD: Click here

      for RHD: Click here

    2. Inspect the security horn assembly.

      for LHD: Click here

      for RHD: Click here

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE SECURITY HORN ASSEMBLY Click here

    C

    REPLACE SECURITY HORN ASSEMBLY Click here

    A

  6. CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY)


    1. Remove the S-HORN relay from the motor compartment relay block LH.

    2. Disconnect the A38 security horn assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (S-HORN relay holder) - A38-1 Always Below 1 Ω
      3 (S-HORN relay holder) or A38-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (S-HORN RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Remove the S-HORN relay from the motor compartment relay block LH.

    2. Disconnect the 4C instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (S-HORN relay holder) - 4C-26 Always Below 1 Ω
      2 (S-HORN relay holder) or 4C-26 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the main body ECU (multiplex network body ECU).

      for LHD: Click here

      for RHD: Click here

    2. Disconnect the instrument panel junction block assembly connector.

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

      A01MH0RC01
      *a

      Component without harness connected

      (Instrument panel junction block assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4C-26 - MB-29 (SH) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    D

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  9. CHECK HORN OPERATION


    1. Press the horn switch and check if the horn sounds.

      OK
      Horn sounds
      Result
      Proceed to
      OK
      NG

    NG

    GO TO HORN SYSTEM Click here

    OK

  10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the main body ECU (multiplex network body ECU).

      for LHD: Click here

      for RHD: Click here

    2. Disconnect the instrument panel junction block assembly connector.

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

      A01MH0RC02
      *a

      Component without harness connected

      (Instrument panel junction block assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      4C-24 - MB-28 (HORN) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    D

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here