THEFT DETERRENT SYSTEM(except 5L-E) Horn Circuit

DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

B001DECE18

CAUTION / NOTICE / HINT

Note


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

  • w/ Entry and Start System:

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

PROCEDURE


  1. CHECK HORNS OPERATION


    1. Press the steering pad switch assembly and check if the horns sound.

      Result
      Proceed to
      Horns sound
      Horns do not sound

    Horns do not sound

    GO TO HORN SYSTEM Click here

    Horns sound

  2. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

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

      B001CACE01
      *1 HORN
      Standard Resistance
      Tester Connection Condition Specified Condition
      2M-29 - A-28 (HORN) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here