THEFT DETERRENT SYSTEM Horn Circuit

DTC Code DTC Name
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

B292916E02

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT HORN

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

      Result

      Result

      Proceed to

      Horn sounds

      A

      Horn does not sound

      B
    B

    GO TO HORN SYSTEM

    A

  2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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

      Click hereClick here

      B332810C01

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

    2. Disconnect the 3A 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

      3A-24 - MB-28 (HORN)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click hereClick here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    Click hereClick here