THEFT DETERRENT SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Disconnect the main body ECU (multiplex network body ECU) connectors.

      A003WXRE12

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

      Tech Tips

      Measure the value(s) on the wire harness side with the connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      MB-31 (ALTB) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-30 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-29 (ACC) - Body ground - Ignition power supply (ACC signal) Power switch on (ACC) → off 11 to 14 V → Below 1 V
      MB-32 (IG) - Body ground - Ignition power supply (IG signal) Power switch on (IG) → off 11 to 14 V → Below 1 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      H17-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MB-2 (FLCY) - Body ground - Front door courtesy light switch LH input Front door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      MB-4 (FRCY) - Body ground - Front door courtesy light switch RH input Front door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      H18-3 (LCTY) - Body ground G - Body ground Rear door courtesy light switch LH input Rear door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      H16-6 (RCTY) - Body ground G - Body ground Rear door courtesy light switch RH input Rear door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      H16-19 (BCTY) - Body ground SB - Body ground Back door courtesy switch input Back door closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      MB-20 (HCTY) - Body ground - Security courtesy switch input Engine hood open (ON) → closed (OFF) Below 1 Ω → 10 kΩ or higher

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the main body ECU (multiplex network body ECU) connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H16-7 (LSFL) - Body ground GR - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      H16-7 (LSFL) - Body ground GR - Body ground Front door LH unlock detection switch input Front door LH locked Pulse generation
      H16-18 (LSFR) - Body ground SB - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      H16-18 (LSFR) - Body ground SB - Body ground Front door RH unlock detection switch input Front door RH locked Pulse generation
      2D-25 (LSWL) - Body ground GR - Body ground Rear door LH unlock detection switch input Rear door LH unlocked Below 1 V
      2D-25 (LSWL) - Body ground GR - Body ground Rear door LH unlock detection switch input Rear door LH locked Pulse generation
      H17-2 (LSWR) - Body ground GR - Body ground Rear door RH unlock detection switch input Rear door RH unlocked Below 1 V
      H17-2 (LSWR) - Body ground GR - Body ground Rear door RH unlock detection switch input Rear door RH locked Pulse generation
      H16-12 (SLF+) - Body ground L - Body ground Security courtesy switch wire Always Below 1 V
      H17-23 (SSW1) - Body ground G - Body ground Intrusion sensor cancel switch signal Intrusion sensor cancel switch on Below 1 V
      H17-23 (SSW1) - Body ground G - Body ground Intrusion sensor cancel switch signal Intrusion sensor cancel switch off Pulse generation
      H17-12 (ISIF) - Body ground V - Body ground Intrusion sensor (theft warning ultrasonic sensor) signal input No moving object detected by sensor 11 to 14 V
      H17-12 (ISIF) - Body ground V - Body ground Intrusion sensor (theft warning ultrasonic sensor) signal input Moving object detected by sensor during arming preparation state or armed state Pulse generation
      2B-15 (GPBS) - Body ground* V - Body ground Glass breakage sensor drive

      Always

      (Back door glass not broken)

      		 Below 1 V
      H17-6 (GCS) - Body ground* G - Body ground Communication line between main body ECU (multiplex network body ECU) and yaw rate and acceleration sensor

      • Theft deterrent system changes from armed preparation state to armed state.

      • The tilt sensor detects pitch angle of vehicle inclination when theft deterrent system is in armed state.

      		 Pulse generation
      H16-3 (HAZ) - Body ground Y - Body ground Turn signal flasher relay signal System in alarm sounding state Below 1 V
      2A-51 (IND) - Body ground BR - Body ground Security indicator light up Security indicator light on (It lights up only for 27.5 sec. in alarm sounding state.) 3 to 10 V
      H17-18 (SSCL) - Body ground L - Body ground Theft warning sire drive

      Theft warning sire sounding

      (Theft deterrent system in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)
      2C-24 (HORN) - Body ground SB - Body ground Vehicle horn drive

      Vehicle horns sounding

      (Theft deterrent system in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)

      • *: w/ Combination Meter Assembly with mph Units

      If the result is not as specified, the main body ECU (multiplex network body ECU) may have a malfunction.