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Terminals Of Ecu

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. BODY ECU (Main) 
    Fig 1: Identifying Terminals Of ECU
    G03375157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminals SPECIFIED CONDITION

    Symbols (Terminals No.) Wiring Color Condition Spesifeid Condition
    GND1 <--> Body ground (4 <--> Body ground) -<--> Body ground Always Below 1 V
    LSR <--> Body ground (5 <--> Body ground) - <--> Body ground RR / RL / Back door lock switch is unlock position Below 1 V
    SIG <--> Body ground (10 <--> Body ground) - <--> Body ground Ignition switch is ON 10-14 V
    BECU <--> Body ground (11 <--> Body ground) - <--> Body ground Always 10-14 V
    BDR1 <--> Body ground (12 <--> Body ground) - <--> Body ground Always 10-14 V
    ILE <--> Body ground (13 <--> Body ground) - <--> Body ground Key cylinder illumination is ON Below 1 V
    SPD <--> Body ground (14 <--> Body ground) - <--> Body ground Ignition switch ON and slowly move the wheel Pulse signal is output below 1.5V <--> approx. 5 V or below 1.5 V <--> battery positive boltage
    UL1 <--> Body ground (15 <--> Body ground) - <--> Body ground Driver door lock control switch is UNLOCK position Below 1 V
    GND2 <--> Body ground (16 <--> Body ground) - <--> Body ground Always Below 1 V
    HRLY <--> Body ground (17 <--> Body ground) - <--> Body ground Ignition switch is ON 10-14 V
    TRLY <--> Body ground (18 <--> Body ground) - <--> Body ground Ignition switch is ON 10-14 V
    L1 <--> Body ground (19 <--> Body ground) - <--> Body ground Driver door lock control switch is LOCK position Below 1 V
    L2 <--> Body ground (20 <--> Body ground) - <--> Body ground Driver door key lock and unlock switch is LOCK position Below 1 V
    ACC <--> Body ground (22 <--> Body ground) - <--> Body ground Ignition switch is ACC position 10-14 V
    ACT+ <--> ACT-(23 <--> 24) - <--> - Door lock motor is operated 10-14 V
    LMRY <--> Body ground (B7-3 <--> Body ground) R-W <--> Body ground Ignition switch is ON 10-14 V
    DRL <--> Body ground (B7-7 <--> Body ground) R-Y <--> Body ground Ignition switch is ON 10-14 V
    ACTD <--> Body ground (B7-10 <--> Body ground) L-B <--> Body ground Driver door lock motor is operated 10-14 V
    MPX4 (B7-11) W <--> Body ground Multiplex communication circuit -
    DBKL <--> Body ground (B7-13 <--> Body ground) G <--> Body ground Driver seat buckle switch is ON (Seat belt is fastend) Below 1 V
    L <--> Body ground (B7-14 <--> Body ground) B-O <--> Body ground Engine is running 6.0-14 V
    Engine is stoped Below 2 V
    UL2 <--> Body ground (B7-22 <--> Body ground) G-B <--> Body ground Door key lock and unlock switch is in LOCK position Below 1 V
    MPX1 (B7-24) B <--> Body ground Multiplex communication circuit -
    PCYL <--> Body ground (B7-25 <--> Body ground) G-B <--> Body ground Ignition switch is ON 10-14 V
    DCYL <--> Body ground (B7-26 <--> Body ground) G-W <--> Body ground Ignition switch is ON 10-14 V
    LSWP <--> Body ground (B7-30 <--> Body ground) L-O <--> Body ground Passenger door lock switch is UNLOCK position Below 1 V
    PKB <--> Body ground (B8-2 <--> Body ground) R-W <--> Body ground Parking brake switch is ON Below 1 V
    PRG <--> Body ground (B8-3 <--> Body ground) V <--> Body ground Communication circuit (Wireless door lock receiver) -
    RDA <--> Body ground (B8-4 <--> Body ground) L <--> Body ground Communication circuit (Wireless door lock receiver) -
    LP <--> Body ground (B8-6 <--> Body ground) G-Y <--> Body ground Rear room light position is DOOR 10-14 V
    BCTY <--> Body ground (B8-7 <--> Body ground) R-L <--> Body ground Back door courtesy switch is ON (Door is opened) Below 1 V
    RLCY <--> Body ground (B8-11 <--> Body ground) R-L <--> Body ground RL door courtesy switch is ON (Door is opened) Below 1 V
    RRCY <--> Body ground (B8-12 <--> Body ground) R-G <--> Body ground RR door courtesy switch is ON (Door is opened) Below 1 V
    MPX5 (B8-14) W <--> Body ground Multiplex communication circuit -
    MPX6 (B8-16) W <--> Body ground Multiplex communication circuit -
    P <--> Body ground (B8-17 <--> Body ground) G-W <--> Body ground Park / Neutral position switch is in P position 10-14 V
    LCYL <--> Body ground (B8-21 <--> Body ground) G-Y <--> Body ground Ignition switch is ON 10-14 V
    RCYL <--> Body ground (B8-22 <--> Body ground) G-R <--> Body ground Ignition switch is ON 10-14 V
    DCTY <--> Body ground (B8-23 <--> Body ground) R-Y <--> Body ground Driver door courtesy switch is ON (Door is opened) Below 1 V
    VOLTAGE SPECIFICATIONS

    PCTY <--> Body ground (B8-24 <--> Body ground) R-B <--> Body ground Passenger door courtesy switch is ON (Door is opened) Below 1 V
    HEAD <--> Body ground (B9-1 <--> Body ground) R-W <--> Body ground Headlight control switch position is HEAD Below 1 V
    HU <--> Body ground (B9-2 <--> Body ground) R-Y <--> Body ground Headlight dimmer switch position is Hi-Beam Below 1 V
    A <--> Body ground (B9-3 <--> Body ground) G-O <--> Body ground Headlight control switch position is AUTO Below 1 V
    CLTS <--> Body ground (B9-4 <--> Body ground) Y <--> Body ground Automatic light communication circuit is ON Below 1 V
    CLTB <--> Body ground (B9-6 <--> Body ground) R <--> Body ground Ignition switch is ON 10-14 V
    HF <--> Body ground (B9-7 <--> Body ground) R-B <--> Body ground Headlight dimmer switch position is Hi-Flasher Below 1 V
    TAIL <--> Body ground (B9-8 <--> Body ground) G-B <--> Body ground Headlight control switch position is TAIL Below 1 V
    DRLP <--> Body ground (B9-12 <--> Body ground) G-Y <--> Body ground Ignition switch is ON, Open door warning light is ON Below 1.2 V
    KSW <--> Body ground (B9-14 <--> Body ground) R-B <--> Body ground Key is inserted in key cylinder Below 1 V
    HF2 <--> Body ground (B9-20 <--> Body ground) R-W <--> Body ground Ignition switch is ON 10-14 V
    CLTE <--> Body ground (B9-21 <--> Body ground) BR <--> Body ground Always Below 1 V
  2. BODY ECU (Sub) 
    Fig 2: Identifying Terminal Of Body ECU
    G03375158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Voltage Specifications

    Symbols (Terminal No.) Wiring Color Condition STD Voltage (V)
    RWLM <--> Body ground (S26-1 <--> Body ground) L-O <--> Body ground Ignition switch ON 10-14 V
    W <--> Body ground (S26-2 <--> Body ground) L <--> Body ground Ignition switch OFF --> ON Below 1 V --> 10-14V
    SIG <--> Body ground (S26-3 <--> Body ground) B-W <--> Body ground Ignition switch OFF --> ON Below 1 V --> 10-14 V
    BECU <--> Body ground (S26-4 <--> Body ground) L-W <--> Body ground Always 10-14V
    WRLO <--> Body ground (S26-5 <--> H-1) L-B <--> Body ground Ignition switch ON and rear wiper switch LO Below 1 V
    L/FS <--> Body ground (S26-6 <--> H-1) B <--> Body ground Ignition switch ON, light control switch TAIL or HEAD and taiiight bulb burnt out Below 1 V
    L/FS <--> Body ground (S26-6 <--> H-1) B <--> Body ground Ignition switch ON, light control switch TAIL or HEAD and stop light bulb burnt out Below 1 V
    BTIL <--> Body ground (S26-7 <--> H-1) G <--> Body ground Light control switch TAIL or HEAD Below 1 V
    TIL1 <--> Body ground (S26-8 <--> H-1) G <--> Body ground Light control switch TAIL or HEAD Below 1 V
    STP2 <--> Body ground (S26-10 <--> H-1) G-W <--> Body ground Stop light switch OFF --> ON (brake pedal free --> depressed) 10-14V --> Below 1 V
    STP1 <--> Body ground (S26-11 <--> H-1) G-W <--> Body ground Stop light switch OFF --> ON (brake pedal free --> depressed) 10-14 --> Below 1 V
    STP1 <--> Body ground (S26-12 <--> H-1) G-W <--> Body ground Stop light switch OFF --> ON (brake pedal free --> depressed) 10-14 --> Below 1 V
    BSTP <--> Body ground (S26-13 <--> H-1) G-W <--> Body ground Stop light switch OFF --> ON (brake pedal free --> depressed) 10-14 V --> Below 1 V
    RWSM <--> Body ground (S26-14 <--> Body ground) L-Y <--> Body ground Ignition switch ON and front wiper stop position --> Except stop position Below 2 V --> 6 - 14 V
    S/M <--> Body ground (S26-15 <--> Body ground) L-W <--> Body ground Ignition switch ON and front wiper stop position --> Except stop position Below 2 V --> 6 - 14 V
    RSPT <--> Body ground (S26-16 <--> Body ground) G-W <--> Body ground Each doors are opened --> all doors are closed Below 1 V --> 10 - 14 V
    LSPT <--> Body ground (S26-17 <--> Body ground) G-W <--> Body ground Each doors are opened --> all doors are closed Below 1 V --> 10 - 14 V
    CSPT <--> Body ground (S26-18 1<--> Body ground) G-W <--> Body ground Ignition switch OFF --> ON 10 - 14 V --> Below 1 V
    WRIN <--> Body ground (S26-19 <--> Body ground) L-Y <--> Body ground Ignition switch ON and rear wiper switch INT Below 1 V
    TIL1 <--> Body ground (S26-20 <--> Body ground) G <--> Body ground Light control switch TAIL or HEAD Below 1 V
    TIL2 <--> Body ground (S26-21 <--> Body ground) G <--> Body ground Light control switch TAIL or HEAD Below 1 V
    ILEN <--> Body ground (S26-23 <--> Body ground) W-G <--> Body ground Ignition switch ON, rheostat volume fully left side --> turn to right side Below 1 V --> pulse generation
    SG <--> Body ground (S26-24 <--> Body ground) BR <--> Body ground Always Below 1 V
    GND <--> Body ground (S26-25 <--> Body ground) W-B <--> Body ground Always Below 1 V
    MPX+ (S27-2) B Multiplex communication circuit -
    WRSW <--> Body ground (S27-4 <--> Body ground) P <--> Body ground Ignition switch ON and rear washer switch ON Below 1 V
    RBD2 <--> Body ground (S27-5 <--> Body ground) R-L <--> Body ground PNP switch P position and each door are opened Below 1 V
    REV <--> Body ground (S27-8 <--> Body ground) R-B <--> Body ground Ignition switch ON and PNP switch reverse position 10-14 V
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