THEFT DETERRENT SYSTEM (w/o Smart Entry and Start System) TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


    1. Disconnect the main body ECU (instrument panel junction block) connectors.

      A017BEHE15

    2. Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D6-7 (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
      D6-21 (PCTY) - Body ground

      SB*1- Body ground

      		 Passenger side courtesy light switch input Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω

      G*2- Body ground
      D6-25 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      D7-16 (HCTY) - Body ground L - Body ground Engine hood courtesy switch Engine hood CLOSED (OFF) → OPEN (ON) Below 1 Ω → 10 kΩ or higher
      D7-24 (DCTY) - Body ground

      G*1- Body ground

      		 Driver side door courtesy light switch input Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω

      SB*2- Body ground

      D9-8 (GHSW)*3- Body ground

      		 O - Body ground Glass hatch courtesy switch Glass hatch CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω
      D9-5 (KSW) - Body ground GR - Body ground Unlock warning switch input No key in ignition key cylinder (OFF) → Key inserted (ON) 10 kΩ or higher → Below 1 Ω
      1A-1 (ACC) - Body ground B - Body ground Ignition power supply (ACC signal) Ignition switch ACC → OFF 11 to 14 V → Below 1 V
      1A-1 (IG) - Body ground B - Body ground Ignition power supply (IG signal) Ignition switch ON → OFF 11 to 14 V → Below 1 V
      1D-16 (ALTB) - Body ground W - Body ground +B (power system alternator system) power supply Always 11 to 14 V
      1F-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1D-10 (BECU) - Body ground W - Body ground +B power supply Always 11 to 14 V
      1M-9 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1O-7 (LCTY) - Body ground B - Body ground Rear courtesy light switch LH input Rear door LH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω

      Tech Tips


      • *1: for LHD

      • *2: for RHD

      • *3: w/ Glass Hatch Opener System

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

    3. Reconnect the main body ECU (instrument panel junction block) connectors.

    4. Measure the voltage between each terminal of the wire harness side connectors and body ground.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D9-6 (SH) - Body ground W - Body ground Security horn drive

      Security horn is sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)
      D8-4 (HAZ) - Body ground O - Body ground Turn signal flasher relay signal System is in alarm sounding state Below 1 V
      D9-4 (IND) - Body ground B - Body ground Security indicator light output

      Security indicator light is on

      (It lights up only in arming preparation state or alarm sounding state. It flashes when immobiliser is operating.)

      		 3 to 6 V
      1D-11 (HORN) - Body ground GR - Body ground Vehicle horn drive

      Vehicle horn is sounding

      (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 12 V)

      If the result is not as specified, the main body ECU (instrument panel junction block) may have a malfunction.