THEFT DETERRENT SYSTEM > TERMINALS OF ECU



CHECK INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)

B109011E03

  1. Disconnect the B4, B5, B6 and B7 ECU connectors.

  2. Disconnect the 1A, 1D, 1F and 1O J/B connectors.

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

    Standard: 
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG (1A-1) - Body ground
    		B - Body ground
    		Ignition power supply
    		Always
    		10 to 14 V
    BECU (1D-10) - Body ground
    		W - Body ground
    		+B (BECU) power supply
    		Always
    		10 to 14 V
    ALTB (1D-16) - Body ground
    		W*1 - Body ground
    		+B (power system, generator system) power supply
    		Always
    		10 to 14 V
    ALTB (1D-16) - Body ground
    		R-Y*2 - Body ground
    		+B (power system, generator system) power supply
    		Always
    		10 to 14 V
    GND1 (1F-10) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    GND2 (1M-9) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    LCTY (1O-7) - Body ground
    		B - Body ground
    		Rear LH courtesy switch
    		Rear door LH CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    HCTY (B4-10) - Body ground
    		R - Body ground
    		Engine hood courtesy switch
    		Engine hood CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    DCTY (B5-14) - Body ground
    		L - Body ground
    		Driver side courtesy switch
    		Driver side door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    RCTY (B5-16) - Body ground
    		GR - Body ground
    		Rear RH courtesy switch
    		Rear door RH CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    KSW (B6-21) - Body ground
    		B - Body ground
    		Key unlock warning switch input
    		No key in ignition key cylinder (OFF) → Key inserted (ON)
    		10 kΩ or higher → Below 1 Ω
    SSW1*3 (B7-10) - Body ground
    		W - Body ground
    		Intrusion sensor OFF switch
    		OFF switch ON
    		Below 1 Ω
    SSW1*3 (B7-10) - Body ground
    		W - Body ground
    		Intrusion sensor OFF switch
    		OFF switch OFF
    		10 kΩ or higher
    PCTY (B7-23) - Body ground
    		L - Body ground
    		Passenger side courtesy switch
    		Passenger side door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    BCTY (B7-25) - Body ground
    		P - Body ground
    		Back door courtesy switch
    		Back door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω

    HINT:
    *1: LHD
    *2: RHD
    *3: Europe only

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

  4. Reconnect the B4, B5, B6 and B7 ECU connectors.

  5. Reconnect the 1A, 1D, 1F, 1M and 1O J/B connectors.

  6. Measure the voltage between each terminal of the connectors and the body ground.

    Standard: 
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    HORN (1D-11) - Body ground
    		R - Body ground
    		Vehicle horn drive
    		Vehicle horn is sounding
    (Theft deterrent system is in alarm sounding state)
    		Pulse generation
    (0 V ← → 12 V)
    HAZ (B6-2) - Body ground
    		Y - Body ground
    		Hazard warning light drive
    		Answer-back OFF → Answer-back ON
    		Below 1 V → Pulse generation
    IND (B6-24) - Body ground
    		W - Body ground
    		Security indicator output
    		Security indicator lights up (It lights up only for 30 sec. in alarm sounding state.
    It flashes when immobilizer system is operating.)
    		3 to 6 V
    S+B*1 (B7-11) - Body ground
    		BR - Body ground
    		Theft warning sensor input
    		Arming preparation state or armed state
    		10 to 14 V
    S+B *1(B7-11) - Body ground
    		BR - Body ground
    		Theft warning sensor input
    		Disarmed state
    		Below 1 V
    SSCL (B7-12) - Body ground
    		Y - Body ground
    		Theft warning siren
    		Self-power siren is sounding
    (Theft deterrent system is in alarm sounding state)
    		Pulse generation
    ISIF*1 (B7-13) - Body ground
    		P - Body ground
    		Theft warning sensor output
    		No moving object detected by sensor
    		10 to 14 V
    ISIF*1 (B7-13) - Body ground
    		P - Body ground
    		Theft warning sensor output
    		Moving object detected by sensor during arming preparation state or armed state
    		Pulse generation

    HINT:
    *1: Europe only

    If the result is not as specified, the J/B assembly (body ECU) may have a malfunction.