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Ecu Connector Terminal Identification

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  1. ENGINE ROOM J/B ASSEMBLY (FRONT CONTROLLER) 
    Fig 1: Identifying Engine Room J/B Assembly Terminals (Front Controller)
    G05409923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    1A-1 - 1H-8 B - W-B Battery (ALT fuse) Always 10 to 14 V
    1C-4 - 1H-8 BR - W-B Hi-beam circuit (To headlight LH) Hi-beam is ON 10 to 14 V
    1C-4 - 1H-8 BR - W-B Hi-beam circuit (To headlight LH) Hi-beam is OFF Below 1 V
    1C-5 - 1H-8 G - W-B Hi-beam circuit (To headlight RH) Hi-beam is ON 10 to 14 V
    1C-5 - 1H-8 G - W-B Hi-beam circuit (To headlight RH) Hi-beam is OFF Below 1 V
    1F-1 - 1H-8 B - W-B Battery (Power source circuit) Always 10 to 14 V ((1))
    1F-1 - 1H-8 W - W-B Battery (Power source circuit) Always 10 to 14 V ((2))
    1G-1 - Body ground V - Body ground Power source circuit Always 10 to 14 V
    1G-2 - Body ground R - Body ground Power source circuit Always 10 to 14 V
    1G-6 - 1H-8 LG - W-B HEAD signal (Front light control switch) Light control switch is HEAD 10 to 14 V
    1G-6 - 1H-8 LG - W-B HEAD signal (Front light control switch) Light control switch isn't HEAD Below 1 V
    1G-7 - Body ground Y - Body ground Multiplex communication signal circuit Ignition switch on (IG) Signal waveform
    1G-8 - Body ground B - Body ground Multiplex communication signal circuit Ignition switch on (IG) Signal waveform
    1H-2 - Body ground W-B - Body ground Body ground Always Below 1 V
    1H-3 - 1H-8 P - W-B HEAD signal (To headlight) Headlight (low) is ON 10 to 14 V
    1H-3 - 1H-8 P - W-B HEAD signal (To headlight) Headlight (low) is OFF Below 1 V
    1H-8 - Body ground W-B - Body ground Body ground Always Below 1 V
    1H-11 - 1H-8 GR - W-B HEAD signal (To headlight leveling control ECU) Headlight (low) is ON Below 1 V
    1H-11 - 1H-8 GR - W-B HEAD signal (To headlight leveling control ECU) Headlight (low) is OFF 10 to 14 V
    (1) with Smart Key System
    (2) without Smart Key System
  2. INSTRUMENT PANEL FUNCTION BLOCK ASSEMBLY (BODY ECU) 
    Fig 2: Identifying Instrument Panel Function Block Assembly Terminals (Body ECU)
    G05409924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATB (IA-1) - GND1 (IF-10) B - W-B Battery (Power source circuit) Always 10 to 14 V
    PKB (IC-14) - GND1 (IF-10) LG - W-B Parking brake switch Parking brake is depressed Below 1 V
    PKB (IC-14) - GND1 (IF-10) LG - W-B Parking brake switch Parking brake is released 10 to 14 V
    BECU (ID-10) - GND1 (IF-10) O - W-B Battery (B+ circuit) Always 10 to 14 V
    ALTB (ID-16) - GND1 (IF-10) G - W-B Battery (ALT fuse) Always 10 to 14 V
    GND1 (IF-10) - Body ground W-B - Body ground Body ground Always Below 1 V
    TRNR (II-5) - GND1 (IF-10) L - W-B RH side turn signal (To turn signal flasher assembly) Ignition switch on (IG) and turn signal switch (right turn) OFF 10 to 14 V
    TRNR (II-5) - GND1 (IF-10) L - W-B RH side turn signal (To turn signal flasher assembly) Ignition switch on (IG) and turn signal switch (right turn) ON Below 1 V
    ILE (II-10) - GND1 (IF-10) BR ((1)) - W-B Key cylinder light (Illumination signal) Ignition key cylinder light is OFF 10 to 14 V
    ILE (11-10) - GND1 (IF-10) BR ((1)) - W-B Key cylinder light (Illumination signal) Ignition key cylinder light is ON Below 1 V
    TRLY (IL-3) - GND1 (IF-10) L ((2)) - W-B TAIL relay (TAIL signal) Light control switch is OFF Below 1 V
    TRLY (IL-3) - GND1 (IF-10) L ((2)) - W-B TAIL relay (TAIL signal) Light control switch is TAIL and fog light switch is ON 10 to 14 V
    GND2 (IM-9) - GND1 (IF-10) W-B - W-B Body ground Always Below 1 Ω
    LCTY (IO-7) - GND1 (IF-10) B - W-B Courtesy switch (Rear left door circuit) Rear left door is open Below 1 V
    LCTY (IO-7) - GND1 (IF-10) B - W-B Courtesy switch (Rear left door circuit) Rear left door is closed Pulse generation (See  a waveform 1)
    LSWL (IP-5) - GND1 (IF-10) GR - W-B Door lock position switch (Rear left door circuit) Rear left door is in the unlock position Below 1 V
    LSWL (IP-5) - GND1 (IF-10) GR - W-B Door lock position switch (Rear left door circuit) Rear left door is in the lock position Pulse generation (See  a waveform 1)
    ILE (IR-5) - GND1 (IF-10) BR - W-B Front interior illumination (Illumination signal) Front interior light is OFF 10 to 14 V
    ILE (IR-5) - GND1 (IF-10) BR - W-B Front interior illumination (Illumination signal) Front interior light is ON Below 1 V
    MPX1 (IR-9) - GND1 (IF-10) B - W-B Multiplex communication signal Ignition switch off Below 1 V
    MPX1 (IR-9) - GND1 (IF-10) B - W-B Multiplex communication signal Ignition switch on (IG) Signal waveform
    TRNL (D9-4) - GND1 (IF-10) R - W-B LH side turn signal (To turn signal flasher assembly) Ignition switch on (IG) and turn signal switch (left turn) OFF 10 to 14 V
    TRNL (D9-4) - GND1 (IF-10) R - W-B LH side turn signal (To turn signal flasher assembly) Ignition switch on (IG) and turn signal switch (left turn) ON Below 1 V
    FFGO (D9-7) - GND1 (IF-10) G ((2)) - W-B Front fog relay (Front fog circuit) Front fog light is OFF 10 to 14 V
    FFGO (D9-7) - GND1 (IF-10) G ((2)) - W-B Front fog relay (Front fog circuit) Front fog light is ON Below 1 V
    DCYL (D8-13) - GND1 (IF-10) SB - W-B Courtesy light (Front left door circuit) Front left courtesy light is OFF 10 to 14 V
    DCYL (D8-13) - GND1 (IF-10) SB - W-B Courtesy light (Front left door circuit) Front left courtesy light is ON Below 1 V
    DCTY (D8-14) - GND1 (IF-10) L - W-B Courtesy switch (Front left door circuit) Front left door is open Below 1 V
    DCTY (D8-14) - GND1 (IF-10) L - W-B Courtesy switch (Front left door circuit) Front left door is closed 10 to 14 V
    RCTY (D8-16) - GND1 (IF-10) GR - W-B Courtesy switch (Rear right door circuit) Rear right door is open Below 1 V
    RCTY (D8-16) - GND1 (IF-10) GR - W-B Courtesy switch (Rear right door circuit) Rear right door is closed Pulse generation (See  a waveform 1)
    HAZ (D7-2) - GND1 (IF-10) P - W-B HAZARD signal (Front hazard switch) Hazard switch is OFF 10 to 14 V
    HAZ (D7-2) - GND1 (IF-10) P - W-B HAZARD signal (Front hazard switch) Hazard switch is ON Below 1 V
    CLTE (D7-4) - GND1 (IF-10) W - W-B Automatic light control sensor (Ground circuit) Always Below 1 V
    CLTS (D7-5) - GND1 (IF-10) LG - W-B Automatic light control sensor (Signal circuit) Ignition switch on (IG) Below 1 V
    CLTS (D7-5) - GND1 (IF-10) LG - W-B Automatic light control sensor (Signal circuit) Ignition switch off 10 to 14 V
    CLTB (D7-6) - GND1 (IF-10) BR - W-B Automatic light control sensor (Power source circuit) Ignition switch off 10 to 14 V
    CLTB (D7-6) - GND1 (IF-10) BR - W-B Automatic light control sensor (Power source circuit) Ignition switch on (IG) Below 1 V
    LSWR (D6-5) - GND1 (IF-10) B - W-B Door lock position switch (Rear right door circuit) Rear right door is in the unlock position Below 1 V
    LSWR (D6-5) - GND1 (IF-10) B - W-B Door lock position switch (Rear right door circuit) Rear right door is in the lock position Pulse generation (See  a waveform 1)
    CSPT (D6-14) - GND1 (IF-10) LG ((3)) - W-B Overhead illumination circuit Overhead console illumination is OFF 10 to 14 V
    CSPT (D6-14) - GND1 (IF-10) LG ((3)) - W-B Overhead illumination circuit Overhead console illumination is ON Below 1 V
    MPX2 (D6-21) - GND1 (IF-10) BR - W-B Multiplex communication signal Ignition switch off Below 1 V
    MPX2 (D6-21) - GND1 (IF-10) BR - W-B Multiplex communication signal Ignition switch on (IG) Signal waveform
    PCTY (D6-23) - GND1 (IF-10) L - W-B Courtesy switch (Front right door circuit) Front right door is open Below 1 V
    PCTY (D6-23) - GND1 (IF-10) L - W-B Courtesy switch (Front right door circuit) Front right door is closed 10 to 14 V
    PCYL (D6-24) - GND1 (IF-10) O - W-B Courtesy light (Front right door circuit) Front right courtesy light is OFF 10 to 14 V
    PCYL (D6-24) - GND1 (IF-10) O - W-B Courtesy light (Front right door circuit) Front right courtesy light is ON Below 1 V
    LGCY (D6-25) -GND1 (IF-10) V - W-B Courtesy switch (Back door circuit) Back door is open Below 1 V
    LGCY (D6-25) - GND1 (IF-10) V - W-B Courtesy switch (Back door circuit) Back door is closed 10 to 14 V
    LSWP (D6-27) - GND1 (IF-10) GR - W-B Door lock position switch (Front right door circuit) Front right door is in the unlock position Below 1 V
    LSWP (D6-27) - GND1 (IF-10) GR - W-B Door lock position switch (Front right door circuit) Front right door is in the lock position 10 to 14 V
    (1) without Smart Key System
    (2) with Front Fog Light
    (3) with Sliding Roof
    1. Waveform 1

      HINT:

      • Gauge set:

        5 V/DIV. 5 ms/DIV.

      • Condition:

        Ignition switch on (IG)

  3. COMBINATION SWITCH ECU (WINDSHIELD WIPER SWITCH ASSEMBLY) 
    Fig 3: Waveform Graph
    G05409925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Combination Switch ECU Terminals (Windshield Wiper Switch Assembly)
    G05409926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (D13-1) - E (D13-5) W - W-B Power source circuit (Front battery) Always 10 to 14 V
    IG (D13-2) - E (D13-5) L - W-B Ignition switch signal circuit (From ignition switch) Ignition switch off Below 1 V
    IG (D13-2) - E (D13-5) L - W-B Ignition switch signal circuit (From ignition switch) Ignition switch on (IG) 10 to 14 V
    HEAD (D13-4) - Body ground LG - Body ground Light control switch HEAD signal Light control switch is not HEAD 10 to 14 V
    HEAD (D13-4) - Body ground LG - Body ground Light control switch HEAD signal Light control switch is HEAD Below 1 V
    E (D13-5) - Body ground W-B - Body ground Ground Always Below 1 V
    MPX1 (D13-6) - Body ground BR - Body ground Multiplex communication signal circuit Ignition switch on (IG) Signal waveform
    MPX2 (D13-7) - Body ground R - Body ground Multiplex communication signal circuit Ignition switch on (IG) Signal waveform ((1))
    MPX2 (D13-7) - Body ground B - Body ground Multiplex communication signal circuit Ignition switch on (IG) Signal waveform ((2))
    (1) with Smart Key System
    (2) without Smart Key System
  4. HEADLIGHT BEAM LEVEL CONTROL ECU 
    Fig 5: Identifying Headlight Beam Level Control ECU Terminals
    G05409927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E1 (A21-1) - Body ground W - Body ground Ground Always Below 1 V
    SPDL (A21-5) - E1 (A21-1) Y - W Vehicle speed signal (From the skid control ECU) Vehicle is driven at approx. 30 km/h (19 mph) Pulse generation (See  a waveform 1)
    SPDR (A21-6) - E1 (A21-1) R - W Vehicle speed signal (From the skid control ECU) Vehicle is driven at approx. 30 km/h(19 mph) Pulse generation (See  a waveform 1)
    B2 (A21-7) - E1 (A21-1) GR - W HEAD relay operation signal HEAD relay is ON Below 1 V
    B2 (A21-7) - E1 (A21-1) GR - W HEAD relay operation signal HEAD relay is OFF 10 to 14 V
    CHG- (A21-8) - E1 (A21-1) Y - W Generator signal circuit Engine is running 10 to 14 V
    CHG- (A21-8) - E1 (A21-1) Y - W Generator signal circuit Engine is stopped Below 1 V
    LR2+ (A21-10) - LR2- (A21-9) LG - W Headlight beam level control motor RH (Operation signal circuit) Ignition switch off Below 1 V
    LR2+ (A21-10) - LR2- (A21-9) LG - W Headlight beam level control motor RH (Operation signal circuit) Engine is running, change vehicle height and keep it fro more than 1 second. Pulse generation (See  b waveform 2)
    LR1+ (A21-12) - LR1- (A21-11) B - BR Headlight beam level control motor RH (Operation signal circuit) Ignition switch off Below 1 V
    LR1+ (A21-12) - LR1- (A21-11) B - BR Headlight beam level control motor RH (Operation signal circuit) Engine is running, change vehicle height and keep it fro more than 1 second. Pulse generation (See  b waveform 2)
    IG (A21-14) - E1 (A21-1) G - W Power source circuit (From engine switch (IG)) Ignition switch off Below 1 V
    IG (A21-14) - E1 (A21-1) G - W Power source circuit (From engine switch (IG)) Ignition switch on (IG) 10 to 14 V
    SGR (A21-17) - E1 (A21-1) V - W Height control sensor (Ground circuit) Always Below 1 V
    INIT (A21-18) - E1 (A21-1) W - W Initialize signal input terminal Ignition switch off Below 1 V
    INIT (A21-18) - E1 (A21-1) W - W Initialize signal input terminal Ignition switch on (IG) Approx. 5.0 V
    SHRL (A21-19) - E1 (A21-1) L - W Height control sensor (Signal circuit) Ignition switch off Below 1 V
    SHRL (A21-19) - E1 (A21-1) L - W Height control sensor (Signal circuit) Ignition switch on (IG) 0.5 to 4.5 V
    SBR (A21-21) - E1 (A21-1) B - W Height control sensor (Power source circuit) Ignition switch off Below 1 V
    SBR (A21-21) - E1 (A21-1) B - W Height control sensor (Power source circuit) Ignition switch on (IG) Approx. 5.0 V
    WNG (A21-26) - E1 (A21-1) V - W Headlight beam level warning indicator signal (To combination meter) Headlight beam level warning indicator comes on Below 1 V
    WNG (A21-26) - E1 (A21-1) V - W Headlight beam level warning indicator signal (To combination meter) Headlight beam level warning indicator goes off 10 to 14 V
    LL2+ (A21-29) - LL2- (A21-28) P - R Headlight beam level control motor LH (Operation signal circuit) Ignition switch off Below 1 V
    LL2+ (A21-29) - LL2- (A21-28) P - R Headlight beam level control motor LH (Operation signal circuit) With the ignition switch on (IG), change vehicle height and keep it for more than 1 second. Pulse generation (See  b waveform 2)
    LL1+ (A21-31) - LL1- (A21-30) L-B - O Headlight beam level control motor LH (Operation signal circuit) Ignition switch off Below 1 V
    LL1+ (A21-31) - LL1- (A21-30) L-B - O Headlight beam level control motor LH (Operation signal circuit) With the ignition switch on (IG), change vehicle height and keep it for more than 1 second. Pulse generation
    (See  b waveform 2)
    1. Waveform 1

      HINT:

      • Terminal:

        SPDR - GND

        SPDR - GND

      • Gauge set:

        5 V/DIV. 2 ms/DIV.

      • Condition:

        Vehicle is driven at approximately 30 km/h (19 mph).

        Fig 6: Waveform Graph (Waveform 1)
        G05409928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2

      HINT:

      • Terminal:

        LL1+ - LL1-

        LL2+ - LL2-

        LR1+ - LR1-

        LR2+ - LR2-

      • Gauge set:

        10 V/DIV. 5 ms/DIV.

      • Condition:

        The light control switch is in the HEAD position when the vehicle is standing still or bouncing.

        Fig 7: Waveform Graph (Waveform 2)
        G05409929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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