THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


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

      A019LI1E02

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F13-6 (RCTY) - Body ground GR - Body ground Rear courtesy light switch RH input Rear door RH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      F12-3 (LCTY) - Body ground L - Body ground Rear courtesy light switch LH input Rear door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-2 (FLCY) - Body ground - Front left door courtesy light switch input Front left door closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-4 (FRCY) - Body ground - Front right door courtesy light switch input Front right door closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      F13-19 (BCTY)* - Body ground R - Body ground Back door courtesy light switch input Back door closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω
      A-29 (ACC) - Body ground - Ignition power supply (ACC signal) Engine switch on (ACC) → off 11 to 14 V → Below 1 V
      A-31 (ALTB) - Body ground - +B (power system alternator system) power supply Always 11 to 14 V
      A-32 (IG) - Body ground - Ignition power supply (IG signal) Engine switch on (IG) → off 11 to 14 V → Below 1 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      F14-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

      *: w/o Power Back Door System

      Tech Tips

      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
      F14-17 (HZSW) - Body ground Y - Body ground Turn signal flasher relay signal System is in alarm sounding state Below 1 V
      F14-18 (SSCL)*1 - Body ground BR - Body ground Theft warning siren drive

      Theft warning siren is sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)
      A-28 (HORN) - Body ground - Vehicle horn drive

      Vehicle horn is sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)
      A-17 (SH)*2 - Body ground - Security horn drive

      Security horn is sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)
      A-20 (HCTY) - Body ground - Engine courtesy switch input Engine hood open (ON) → closed (OFF) Below 1 Ω → 10 kΩ or higher

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


      • *1: w/ Theft Warning Siren

      • *2: w/ Security Horn