THEFT DETERRENT SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND COWL SIDE JUNCTION BLOCK LH

    B0018AXE04
    Text in Illustration
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.


    2. Connect the cowl side junction block LH connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A-11 (GND1) - Body ground None - Body ground Ground Always Below 1 Ω
      A-30 (ACC) - Body ground None - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V
      A-31 (BECU) - Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground None - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      E118-6 (FLCY) - Body ground V - Body ground Front door courtesy light switch assembly LH input signal Front door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      E118-27 (FRCY) - Body ground V - Body ground Front door courtesy light switch assembly RH input signal Front door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-13 (LCTY) - Body ground None - Body ground Rear door courtesy light switch assembly LH input signal Rear door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-2 (RCTY) - Body ground None - Body ground Rear door courtesy light switch assembly RH input signal Rear door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-4 (BCTY) - Body ground None - Body ground Back door courtesy light switch signal Back door closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      E118-11 (HCTY) - Body ground L - Body ground Engine hood courtesy switch input signal Engine hood open (OFF) → closed (ON) 10 kΩ or higher → Below 1 Ω

    4. Install the main body ECU (multiplex network body ECU) to the cowl side junction block LH.


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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2J-19 (LSFL) - Body ground G - Body ground Front door LH unlock detection switch input signal Front door LH unlocked Below 1 V
      Engine switch off, all doors closed and front door LH locked Pulse generation
      2J-16 (LSFR) - Body ground B - Body ground Front door RH unlock detection switch input signal Front door RH unlocked Below 1 V
      Engine switch off, all doors closed and front door RH locked Pulse generation
      2K-33 (LSWL) - Body ground L - Body ground Rear door LH unlock detection switch input signal Rear door LH unlocked Below 1 V
      Engine switch off, all doors closed and rear door LH locked Pulse generation
      E117-2 (LSWR) - Body ground W - Body ground Rear door RH unlock detection switch input signal Rear door RH unlocked Below 1 V
      Engine switch off, all doors closed and rear door RH locked Pulse generation
      2H-26 (SH) - Body ground*4 LG - Body ground Security horn drive

      Security horn sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      E117-18 (SSCL) - Body ground*1 R - Body ground Theft warning siren drive

      Theft warning siren sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      E117-13 (SSW1) - Body ground*2 L - Body ground Intrusion sensor cancel switch signal Intrusion sensor cancel switch on Below 1 V
      Intrusion sensor cancel switch off Pulse generation
      E117-12 (ISIF) - Body ground*2 G - Body ground Theft warning ultrasonic sensor signal input

      • No moving object detected by sensor

      • Vehicle tilt not detected

      		 11 to 14 V
      Theft deterrent system changes from disarmed state to armed preparation state

      Pulse generation

      (See Waveform 1)
      E118-7 (GPBS) - Body ground*3 V - Body ground Glass breakage sensor signal Glass breakage sensor normal Below 2 V
      2H-27 (HORN) - Body ground L - Body ground Vehicle horn drive

      Vehicle horns sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)

      • *1: w/ Theft Warning Siren Assembly

      • *2: w/ Intrusion Sensor

      • *3: w/ Glass Breakage Sensor

      • *4: w/ Security Horn Assembly

    6. Using an oscilloscope, check the waveform.

      Tech Tips

      The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.


      1. Waveform 1 (Reference)

        B0018D7C03
        *a IOUT Initial Signal *b IOUT Initial Response
        *c Approximately 1.0 Second *d Initial Diagnosis
        *e Approximately 1.0 to 1.6 Seconds *f Approximately 0.05 Seconds
        *g Approximately 5.5 Seconds *h Disarmed State
        *i Arming Preparation State - -