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Terminals Of Ecu

  1. CHECK ENGINE ROOM NO.2 RELAY BLOCK (FRONT CONTROLLER) 
    Fig 1: Identifying Engine Room No.2 Relay Block (Front Controller) ECU Terminals
    G04021481Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINALS REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    ALTB (2E-1) - Body ground W - Body ground Power source circuit Always 10 to 14 V
    BATB (2E-2) - Body ground W-L - Body ground Power source circuit Always 10 to 14 V
    FMIG (2E-3) - Body ground B-Y - Body ground Engine switch signal circuit Engine switch on (IG) 10 to 14 V
    FMIG (2E-3) - Body ground B-Y - Body ground Engine switch signal circuit Engine switch off Below 1 V
    FMB3 (2E-4) - Body ground G-R - Body ground Power source circuit Always 10 to 14 V
    E (2F-1) - Body ground W-B - Body ground Ground Always Below 1 V
    MPX1 (2F-5) - Body ground GR-L - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (2F-6) - Body ground GR-L - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    FOGR (2G-6) - Body ground G-Y - Body ground Fog light circuit (To front fog light RH) Front fog light ON 10 to 14 V
    FOGR (2G-6) - Body ground G-Y - Body ground Fog light circuit (To front fog light RH) Front fog light OFF Below 1 V
    FOGL (2G-7) - Body ground G-R - Body ground Fog light circuit (To front fog light LH) Front fog light ON 10 to 14 V
    FOGL (2G-7) - Body ground G-R - Body ground Fog light circuit (To front fog light LH) Front fog light OFF Below 1 V
    CRAR (2G-8) - Body ground G -Body ground Taillight circuit (To clearance light RH) Light control switch on TAIL 10 to 14 V
    CRAR (2G-8) - Body ground G -Body ground Taillight circuit (To clearance light RH) Light control switch OFF Below 1 V
    CRAL (2G-9) - Body ground G -Body ground Taillight circuit (To clearance light LH) Light control switch on TAIL 10 to 14 V
    CRAL (2G-9) - Body ground G -Body ground Taillight circuit (To clearance light LH) Light control switch OFF Below 1 V
    HLHR (2G-12) - Body ground R-W -Body ground Hi-beam circuit (To headlight RH) Headlight dimmer switch on HI 10 to 14 V
    HLHR (2G-12) - Body ground R-W -Body ground Hi-beam circuit (To headlight RH) Headlight dimmer switch on HEAD Below 1 V
    HLHL (2G-13) - Body ground R-Y -Body ground Hi-beam circuit (To headlight LH) Headlight dimmer switch on HI 10 to 14 V
    HLHL (2G-13) - Body ground R-Y -Body ground Hi-beam circuit (To headlight LH) Headlight dimmer switch on HEAD Below 1 V
  2. CHECK MULTIPLEX NETWORK BODY ECU (COWL SIDE JUNCTION BLOCK ECU RH) 
    Fig 2: Identifying Multiplex Network Body ECU Connector Front View
    G04021482Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK BODY ECU CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND2 (DD-7) - Body ground W-B - Body ground Ground Always Below 1 V
    LCTY (DA-11) - Body ground G - Body ground Illumination signal (From courtesy switch rear LH) Rear LH door is closed 10 to 14 V
    LCTY (DA-11) - Body ground G - Body ground Illumination signal (From courtesy switch rear LH) Rear LH door is open Below 1 V
    MPX (DA-26) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    GND2 (DD-7) - Body ground W-B - Body ground Ground Always Below 1 V
    IG (15) - Body ground - Engine switch signal circuit Engine switch on (IG) 10 to 14 V
    IG (15) - Body ground - Engine switch signal circuit Engine switch off Below 1 V
    ACC (22) - Body ground -Body ground Engine switch on (ACC) signal circuit Engine switch off Below 1 V
    ACC (22) - Body ground -Body ground Engine switch on (ACC) signal circuit Engine switch on (ACC) 10 to 14 V
    BECU (DK-5) - Body ground G-R - Body ground Multiplex communication power source circuit Always 10 to 14 V
    HRLY (DL-7) - Body ground R - Body ground HEAD signal (To HEAD relay) Light control switch OFF or in TAIL 10 to 14 V
    HRLY (DL-7) - Body ground R - Body ground HEAD signal (To HEAD relay) Light control switch in HEAD Below 1 V
    DCTY (U1-14) - Body ground R - Body ground Illumination signal (From driver side courtesy) Driver's side door is closed 10 to 14 V
    DCTY (U1-14) - Body ground R - Body ground Illumination signal (From driver side courtesy) Driver's side door is open Below 1 V
    RCTY (U1-16) - Body ground L - Body ground Illumination signal (From courtesy switch rear RH) Rear door is closed 10 to 14 V
    RCTY (U1-16) - Body ground L - Body ground Illumination signal (From courtesy switch rear RH) Rear door is open Below 1 V
    FSPT (K68-15) - Body ground Y - Body ground Illumination signal (To foot lights) Foot lights come on Below 1 V
    FSPT (K68-15) - Body ground Y - Body ground Illumination signal (To foot lights) Foot lights go off 10 to 14 V
    MPX2 (K68-21) - Body ground G - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    RCTY (U1-16) - Body ground L - Body ground Illumination signal (From courtesy switch front LH) Passenger's side door is closed 10 to 14 V
    PCTY (K68-23) - Body ground R - Body ground Illumination signal (From courtesy switch front LH) Passenger's side door is open Below 1 V
    HAZ (K67-2) - Body ground O - Body ground HAZARD signal (From hazard switch) Hazard switch OFF 10 to 14 V
    HAZ (K67-2) - Body ground O - Body ground HAZARD signal (From hazard switch) Hazard switch ON Below 1 V
    CLTE (K67-4) - Body ground BR - Body ground Automatic light control sensor ground circuit Always Below 1 V
    CLTS (K67-5) - Body ground R - Body ground Automatic light control sensor ground circuit Engine switch off Below 1 V
    CLTS (K67-5) - Body ground R - Body ground Automatic light control sensor ground circuit Engine switch on (IG), light control switch on AUTO, headlight comes ON Signal waveform
    CLTB (K67-6) - Body ground W - Body ground Automatic light control sensor power source circuit Engine switch off Below 1 V
    CLTB (K67-6) - Body ground W - Body ground Automatic light control sensor power source circuit Engine switch on (IG) 10 to 14 V
    HEAD (K67-23) - Body ground G - Body ground HEAD signal (From light control switch) Light control switch OFF or on TAIL 10 to 14 V
    HEAD (K67-23) - Body ground G - Body ground HEAD signal (From light control switch) Light control switch in HEAD Below 1 V
  3. CHECK COWL SIDE JUNCTION BLOCK ECU LH 
    Fig 3: Cowl Side Junction Block ECU LH Connector Front View
    G04021483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COWL SIDE JUNCTION BLOCK ECU LH CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (PA-14) - Body ground W-B - Body ground Ground Always Below 1 V
    TR (PA-15) - Body ground B - Body ground RH side turn signal (To turn signal flasher assembly) Engine switch off Below 1 V
    TR (PA-15) - Body ground B - Body ground RH side turn signal (To turn signal flasher assembly) Engine switch on (IG) and turn signal switch (right turn) ON 10 to 14 V (60 to 120 times per minute)
    TL (PA-16) - Body ground L - Body ground LH side turn signal (To turn signal flasher assembly) Engine switch off Below 1 V
    TL (PA-16) - Body ground L - Body ground LH side turn signal (To turn signal flasher assembly) Engine switch on (IG) and turn signal switch (left turn) ON 10 to 14 V (60 to 120 times per minute)
    SGND (PD-7) - Body ground W-B - Body ground Ground Always Below 1 V
    SGND (PD-8) - Body ground W-B - Body ground Ground Always Below 1 V
    IG (15) - Body ground - Engine switch signal circuit Engine switch on (IG) 10 to 14 V
    IG (15) - Body ground - Engine switch signal circuit Engine switch off Below 1 V
    MPX-B (PL-1) - Body ground G-R - Body ground Multiplex communication power source circuit Always 10 to 14 V
    ILE (V1-2) - Body ground L - Body ground Illumination signal (To front room light) Room light switch in DOOR position and room light comes on Below 1 V
    ILE (V1-2) - Body ground L - Body ground Illumination signal (To front room light) Room light switch in DOOR position and room light comes on 10 to 14 V
    RCTY (V1-3) - Body ground Y - Body ground Illumination signal (To room light rear RH) Spot light rear RH comes on Below 1 V
    RCTY (V1-3) - Body ground Y - Body ground Illumination signal (To room light rear RH) Room light rear RH goes off 10 to 14 V
    LCTY (V1-4) - Body ground SB - Body ground Illumination signal (To room light rear LH) Room light rear LH comes on Below 1 V
    LCTY (V1-4) - Body ground SB - Body ground Illumination signal (To room light rear LH) Room light rear LH goes off 10 to 14 V
    MPX1 (V3-15) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    ALTL (A30-4) - Body ground B-R - Body ground Generator signal circuit Engine is running 10 to 14 V
    ALTL (A30-4) - Body ground B-R - Body ground Generator signal circuit Engine is stopped Below 1 V
    WNG (A30-13) - Body ground B-R - Body ground Headlight beam level warning signal (From headlight beam level control ECU) Headlight beam level warning indicator comes on Below 1 V
    WNG (A30-13) - Body ground B-R - Body ground Headlight beam level warning signal (From headlight beam level control ECU) Headlight beam level warning indicator goes off 10 to 14 V
  4. CHECK MULTIPLEX NETWORK REAR ECU (LUGGAGE ROOM JUNCTION BLOCK ECU) 
    Fig 4: Multiplex Network Rear ECU (Luggage Room Junction Block ECU) Connector Front View
    G04021484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK REAR ECU (LUGGAGE ROOM JUNCTION BLOCK ECU) CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BCK1 (LA-2) - Body ground R - Body ground Back-up light signal (To luggage compartment door side rear combination light LH and RH) Engine switch off Below 1 V
    BCK1 (LA-2) - Body ground R - Body ground Back-up light signal (To luggage compartment door side rear combination light LH and RH) Engine switch on (IG) and shift lever in R position 10 to 14 V
    PGND (LF-1) - Body ground W-B - Body ground Ground Always Below 1 V
    PGND (LF-1) - Body ground W-B - Body ground Ground Always Below 1 V
    TIL2 (LA-8) - Body ground V - Body ground Taillight signal (To luggage compartment door side rear combination light LH) Light control switch OFF Below 1 V
    TIL2 (LA-8) - Body ground V - Body ground Taillight signal (To luggage compartment door side rear combination light LH) Light control switch on TAIL 10 to 14 V
    LCE1 (LA-10) - Body ground GR - Body ground Taillight signal (To license plate light LH and RH) Light control switch OFf Below 1 V
    LCE1 (LA-10) - Body ground GR - Body ground Taillight signal (To license plate light LH and RH) Light control switch OFF Below 1 V
    LCE (LA-10) - Body ground GR - Body ground Taillight signal (To license plate light LH and RH) Light control switch on TAIL 10 to 14 V
    TIL1 (LA-22) - Body ground BR - Body ground Taillight signal (To luggage compartment door side rear combination light RH) Light control switch OFF Below 1 V
    TIL1 (LA-22) - Body ground BR - Body ground Taillight signal (To luggage compartment door side rear combination light RH) Light control switch on TAIL 10 to 14 V
    +BR (2) - Power source circuit Always 10 to 14 V
    SG (LC-3) - Body ground W-B - Body ground Ground Always Below 1 V
    ECUB (LC-15) - Body ground B - Body ground Multiplex communication power source circuit Always 10 to 14 V
    MPX1 (LC-21) - Body ground BR - Body ground Multiplex communication power source circuit Engine switch on (IG) Signal waveform
    IG (8) - Body ground - Body ground Power source circuit Engine switch on (IG) 10 to 14 V
    MPX2 (LC-31) - Body ground GR - Body ground Multiplex communication power source circuit Engine switch on (IG) Signal waveform
    STP1 (LA-4) - Body ground B - Body ground Stop light switch signal Brake pedal is released Below 1 V
    STP1 (LA-4) - Body ground B - Body ground Stop light switch signal Brake pedal is depressed 10 to 14 V
    PGND (LF-1) - Body ground W-B - Body ground Ground Always Below 1 V
    TIL2 (LA-8) - Body ground V - Body ground Taillight signal (To body side rear combination light LH) Light control switch OFF Below 1 V
    TIL2 (LA-8) - Body ground V - Body ground Taillight signal (To body side rear combination light LH) Light control switch on Tail 10 to 14 V
    STP2 (LG-7) - Body ground W - Body ground Taillight signal (To body side rear combination light LH and RH) Brake pedal is released Below 1 V
    STP2 (LG-7) - Body ground W - Body ground Taillight signal (To body side rear combination light LH and RH) Brake pedal is depressed 10 to 14 V
    BCK1 (LA-2) - Body ground R - Body ground Back-up light signal (To body side rear combination light LH and RH) Engine switch off Below 1 V
    BCK1 (LA-2) - Body ground R - Body ground Back-up light signal (To body side rear combination light LH and RH) Engine switch on (IG) and shift lever in R position 10 to 14 V
  5. CHECK MULTIPLEX NETWORK DOOR ECU FRONT RH (Front Passenger Side Door ECU) 
    Fig 5: Multiplex Network Door ECU Front RH (Front Passenger Side Door ECU) Connector Front View
    G04021485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER SIDE DOOR ECU) REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (N4-1) - Body ground W-B - Body ground Ground Always Below 1 V
    SIG (N4-3) - GND (N4-1) L - W-B Power source circuit (From battery) Engine switch off Below 1 V
    SIG (N4-3) - GND (N4-1) L - W-B Power source circuit (From battery) Engine switch on (IG) 10 to 14 V
    CPUB (N4-4) - GND (N4- 1) LG - W-B Power source circuit (From battery) Always 10 to 14 V
    BDR (N4-6) - GND (N7-1) L - W-B Power source circuit (From battery) Always 10 to 14 V
    MPX1 (N3-8) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (N4-9) - Body ground P - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    CTYB (N4-12) - CYL (N3- 11) L - R Illumination signal (To door courtesy light front RH) Driver's side door is open Below 1 V
    CTYB (N4-12) - CYL (N4- 11) L - R Illumination signal (To door courtesy light front RH) Driver's side door is closed 10 to 14 V
    LED+ (N4-14) - LED-(N4- 13) P- W-B Inside handle illumination signal (Inside handle illumination front RH) Driver's side door is open Below 1 V
    LED+ (N4-14) - LED-(N4- 13) P - W-B Inside handle illumination signal (Inside handle illumination front RH) Driver's side door is closed 10 to 14 V
    LSW (N4-14) - LSWE (N4- 13) G - LG Door lock position circuit Driver's side door is locked 10 to 14 V
    LSW (N4-14) - LSWE (N4- 13) G - LG Door lock position circuit Driver's side door is unlocked Below 1 V
  6. CHECK MULTIPLEX NETWORK DOOR ECU Front LH (Driver Side Door ECU) 
    Fig 6: Multiplex Network Door ECU Front LH (Driver Side Door ECU) Connector Front View
    G04021486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER SIDE DOOR ECU) REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (N3-1) - Body ground W-B - Body ground Ground Always Below 1 V
    SIG (N3-3) - GND (N3-1) Y - W-B Power source circuit (From battery) Engine switch off Below 1 V
    SIG (N3-3) - GND (N3-1) Y - W-B Power source circuit (From battery) Engine switch on (IG) 10 to 14 V
    CPUB (N3-4) - GND (N3- 1) LG - W-B Power source circuit (From battery) Always 10 to 14 V
    BDR (N3-6) - GND (N3-1) L - W-B Power source circuit (From battery) Always 10 to 14 V
    MPX1 (N3-8) - Body ground P - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (N3-9) - Body ground L - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    CTYB (O6-12) - CYL (O6- 11) L - R Illumination signal (To door courtesy light front LH) Passenger's side door is open Below 1 V
    CTYB (N3-12) - CYL (N3- 11) L - R Illumination signal (To door courtesy light front LH) Passenger's side door is closed 10 to 14 V
    LED+ (N3-14) - LED-(N3- 13) W - W-B Inside handle illumination signal (Inside handle illumination front LH) Passenger's side door is open Below 1 V
    LED+ (N3-14) - LED-(N3- 13) W - W-B Inside handle illumination signal (Inside handle illumination front LH) Passenger's side door is closed 10 to 14 V
  7. CHECK MULTIPLEX NETWORK DOOR ECU REAR RH (Rear Door RH) 
    Fig 7: Multiplex Network Door ECU Rear RH (Rear Door RH) Connector Front View
    G04021487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH) CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (O3-1) - Body ground W-B - Body ground Ground Always Below 1 V
    SIG (O3-3) - GND (O3-1) L - W-B Power source circuit (From battery) Engine switch off Below 1 V
    SIG (O3-3) - GND (O3-1) L - W-B Power source circuit (From battery) Engine switch on (IG) 10 to 14 V
    CPUB (O3-4) - GND (O3- 1) G - W-B Power source circuit (From battery) Always 10 to 14 V
    BDR (O3-6) - GND (O3-1) L - W-B Power source circuit (From battery) Always 10 to 14 V
    MPX1 (O3-8) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (O3-9) - Body ground P - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    CTYB (O3-12) - CYL (O3- 11) L - R Illumination signal (To door courtesy light front RH) Door courtesy light comes on 10 to 14 V
    CTYB (O3-12) - CYL (O37-11) L - R Illumination signal (To door courtesy light front RH) Door courtesy light goes off Below 1 V
    LED+ (O3-14) - LED- (O3- 13) V - W-B Illumination signal (To ashtray illumination rear LH) Rear RH side door is open 10 to 14 V
    LED+ (O3-14) - LED- (O3-13) V - W-B Illumination signal (To ashtray illumination rear LH) Rear RH side door is closed Below 1 V
    LSW (O2-14) - LSWE (O2- 13) LG - W-B Door lock position circuit Rear RH door is locked 10 to 14 V
    LSW (O2-14) - LSWE (O2- 13) LG - W-B Door lock position circuit Rear RH door is unlocked Below 1 V
  8. CHECK MULTIPLEX NETWORK DOOR ECU REAR LH (Rear Door LH) 
    Fig 8: Multiplex Network Door ECU Rear LH (Rear Door LH) Connector Front View
    G04021488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH) CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (P2-1) - Body ground W-B - Body ground Ground Always Below 1 V
    SIG (P2-3) - GND (P2-1) G - W-B Power source circuit (From battery) Engine switch off Below 1 V
    SIG (P2-3) - GND (P2-1) G - W-B Power source circuit (From battery) Engine switch on (IG) 10 to 14 V
    CPUB (P2-4) - GND (P2- 1) BR - W-B Power source circuit (From battery) Always 10 to 14 V
    BDR (Q6-6) - GND (Q6-1) L - W-B Power source circuit (From battery) Always 10 to 14 V
    MPX1 (P2-8) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (P2-9) - Body ground P - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    CTYB (P2-12) - CYL (P2- 11) L - R Illumination signal (To door courtesy light front LH) Door courtesy light comes on 10 to 14 V
    CTYB (P2-12) - CYL (P2- 11) L - R Illumination signal (To door courtesy light front LH) Door courtesy light goes off Below 1 V
    LED+ (P2-14) - LED- (P2- 13) V - W-B Illumination signal (To ashtray illumination rear LH) Rear LH side door is open 10 to 14 V
    LED+ (P2-14) - LED- (P2- 13) V - W-B Illumination signal (To ashtray illumination rear LH) Rear LH side door is closed Below 1 V
    LSW (P3-14) - LSWE (P3- 13) LG - W-B Door lock position circuit Rear LH door is locked 10 to 14 V
    LSW (P3-14) - LSWE (P3- 13) LG - W-B Door lock position circuit Rear LH door is unlocked Below 1 V
  9. CHECK COMBINATION SWITCH ASSEMBLY (Windshield Wiper Switch) 
    Fig 9: Combination Switch Assembly (Windshield Wiper Switch) Connector Front View
    G04021489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMBINATION SWITCH ASSEMBLY (WINDSHIELD WIPER SWITCH) CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (L36-1) - E (L36-5) GR - W-B Power source circuit (From battery) Always 10 to 14 V
    IG (L36-2) - E (L36-5) LG - W-B Engine switch signal circuit (From engine switch) Engine switch off Below 1 V
    IG (L36-2) - E (L36-5) LG - W-B Engine switch signal circuit (From engine switch) Engine switch on (IG) 10 to 14 V
    HEAD (L36-4) - Body ground V - Body ground Light control switch HEAD signal Light control switch not on HEAD 10 to 14 V
    HEAD (L36-4) - Body ground V - Body ground Light control switch HEAD signal Light control switch on HEAD Below 1 V
    E (L36-5) - Body ground W-B - Body ground Ground Always Below 1 V
    MPX1 (L36-6) - Body ground G - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    MPX2 (L36-7) - Body ground O - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
  10. CHECK HEADLIGHT BEAM LEVEL CONTROL ECU 
    Fig 10: Headlight Beam Level Control ECU Connector Front View
    G04021490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    HEADLIGHT BEAM LEVEL CONTROL ECU CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E1 (A21-1) - Body ground W-B - Body ground Ground Always Below 1 V
    SPDL (A21-5) - E1 (A21- 1) R-L - W-B Vehicle speed signal (From skid control ECU) Vehicle is driving at approx. 30 km/h (19 mph) Pulse generation (see waveform 1)
    SPDR (A21-6) - E1 (A21- 1) G-W - W-B Vehicle speed signal (From skid control ECU) Vehicle is driving at approx. 30 km/h (19 mph) Pulse generation (see waveform 1)
    B2 (A21-7) - E1 (A21-1) R - W-B HEAD relay operation signal Light control switch is in HEAD position Below 1 V
    B2 (A21-7) - E1 (A21-1) R - W-B HEAD relay operation signal Light control switch is off 10 to 14 V
    CHG- (A21-8) - E1 (A21-1) B-R - W-B Generator signal circuit Engine is running 10 to 14 V
    CHG- (A21-8) - E1 (A21-1) B-R - W-B Generator signal circuit Engine is stopped Below 1 V
    LR2+ (A21-10) - LR2- (A21-9) P - LG Headlight beam level control motor RH (Operation signal circuit) Engine switch off Below 1 V
    LR2+ (A21-10) - LR2- (A21-9) P - LG Headlight beam level control motor RH (Operation signal circuit) Engine is running and light control switch is in HEAD position change the vehicle height and keep it for more than 1 second. Pulse generation (see waveform 2)
    LR1+ (A21-12) - LR1- (A21-11) L -BR-W Headlight beam level control motor RH (Operation signal circuit) Engine switch OFF Below 1 V
    LR1+ (A21-12) - LR1- (A21-11) L -BR-W Headlight beam level control motor RH (Operation signal circuit) Engine is running and light control switch is in HEAD position change the vehicle height and keep it for more than 1 second. Pulse generation (see waveform 2)
    IG (A21-14) - E1- (A21-1) W - B Power source circuit (To engine switch) Engine switch off Below 1 V
    IG (A21-14) - E1- (A21-1) W - B Power source circuit (To engine switch) Engine switch is on (IG) 10 to 14 V
    SGR (A21-17) - E1- (A21- 1) R-Y - W-B Height control sensor (Ground circuit) Always Below 1 V
    SHRL (A21-18) - E1- (A21-1) G-B - W-B Height control sensor (Signal circuit) Engine switch off Below 1 V
    SHRL (A21-18) - E1- (A21-1) G-B - W-B Height control sensor (Signal circuit) Engine switch is on (IG) 0.5 to 4.5 V
    SBR (A21-21) - E1- (A21-1) W - W-B Height control sensor (Power source circuit) Engine switch off Below 1 V
    SBR (A21-21) - E1- (A21- 1) W - W-B Height control sensor (Power source circuit) Engine switch is on (IG) Approx. 5.0 V
    WNG (A21-26) - E1- (A21- 1) G-B - W-B 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) G-B - W-B 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) Y-R - V-R Headlight beam level control motor LH (Operation signal circuit) Engine switch off Below 1 V
    LL2+ (A21-29) - LL2- (A21-28) Y-R - V-R Headlight beam level control motor LH (Operation signal circuit) Engine is running and light control switch is in HEAD position change the vehicle height and keep it for more than 1 second. Pulse generation (see waveform 2)
    LL1+ (A21-31) - LL1- (A21-30) R-G - G Headlight beam level control motor LH (Operation signal circuit) Engine switch off Below 1 V
    LL1+ (A21-31) - LL1- (A21-30) R-G - G Headlight beam level control motor LH (Operation signal circuit) Engine is running and light control switch is in HEAD position change the vehicle height and keep it for more than 1 second. Pulse generation (see waveform 2)
  11. CHECK AFS ECU 
    Fig 11: AFS ECU Connector Front View
    G04021491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    AFS ECU CONNECTOR REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    SBF (A28-1) - SGF (A28- 17) R-R - G Vehicle height signal (To height control sensor) Engine switch off Below 1 V
    Engine switch on (IG) 4.5 V to 5.5 V
    SPDL (A28-6) - E1 (A292- 1) R-L - W-B Vehicle speed signal (To skid control ECU) Vehicle is driving at approx. 30 km/h (19 mph) Pulse generation (see waveform 1)
    SPDR (A28-7) - E1 (A29- 1) G-W - W-B Vehicle speed signal (To skid control ECU) Vehicle is driving at approx. 30 km/h (19 mph) Pulse generation (see waveform 1)
    BR1+ (A28-9) - BR1- (A28-10) LG-R - O Headlight swivel motor RH Engine switch off Below 1 V
    Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel to right more than 7.5° Pulse generation (see waveform 2)
    BR2+ (A28-11) - BR2- (A28-12) L-B - L-Y Headlight swivel motor RH Engine Switch off Below 1 V
    Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel more than7.5° Pulse generation (see waveform 2)
    LR1+ (A28-13) - LR1- (A28-14) L - BR-W Headlight leveling actuator RH Engine Switch off Below 1 V
    Engine running, light control switch in HEAD, the vehicle is standing still or bounding Pulse generation (see waveform 3)
    LR2+ (A28-15) - LR2- (A28-16) P - LG Headlight leveling actuator RH Engine Switch off Below 1 V
    Engine running, light control switch in HEAD, the vehicle is standing still or bounding Pulse generation (see waveform 3)
    SGF (A28-17) - E1 (A29- 1) G - W-B Vehicle height signal (To height control sensor) Always Below 1 V
    SMGR (A28-18) - E1 (A28-1) W-R - W-B Headlight swivel motor RH Always Below 1 V
    SMGL (A28-19) - E1 (A28- 1) P-G - W-B Headlight swivel motor LH Always Below 1 V
    SMBR (A28-21) - SMGR (A29-18) G-K - W-R Headlight swivel motor RH Engine switch off Below 1 V
    Engine switch on (IG) 4.5 V to 5.5 V
    SMBL (A28-22) - SMGL (A29-19) W - P-G Headlight swivel motor LH Engine switch off Below 1 V
    Engine switch on (IG) 4.5 V to 5.5 V
    SMR (A28-23) - SMGR (A29-18) W - R Headlight swivel motor RH Engine switch off Below 1 V
    Engine switch on (IG) 0.3 V to 4.6 V
    SML (A28-24) - SMGL (A29-19) W-B - P-G Headlight swivel motor LH Engine switch off Below 1 V
    Engine switch on (IG) 0.3 V to 4.6V
    BL1+ (A28-25) - BL1- (A28-26) B-L - L-W Headlight swivel motor LH Engine switch off Below 1 V
    Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel to left more than 7.5° Pulse generation (see waveform 2)
    BL2+ (A28-27) - BL2- (A29-28) L-R - V Headlight swivel motor LH Engine Switch off Below 1 V
    Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel to left more than 7.5° Pulse generation (see waveform 2)
    LL1+ (A28-29) - LL1-(A29- 30) R-G - G Headlight leveling actuator LH Engine Switch off Below 1 V
    Engine running, light control switch in HEAD, the vehicle is still or bounced Pulse generation (see waveform 3)
    LL2+ (A28-31) - LL2-(A29- 32) Y-R - V-R Headlight leveling actuator LH Engine switch off Below 1 V
    Engine running, light control switch in HEAD, the vehicle is still or bounced Pulse generation (see waveform 3)
    E1 (A29-1) - Body ground W-B - Body ground Ground Always Below 1 V
    IG (A29-2) - E1 (A29-1) B - Body ground Power source circuit (To engine switch) Engine switch off Below 1 V
    Engine switch on (IG) 10 to 14 V
    MPX1 (A29-5) - E1 (A29- 1) G-R - Body ground Multiplex communication signal Engine switch on (IG) Signal waveform
    MPX2 (A29-6) - E1 (A29- 1) GR-L - Body ground Multiplex communication signal Engine switch on (IG) Signal waveform
    SS+ (A29-7) -SS- (A29-8) ((1)) L - LG Steering sensor signal (To position sensor) Engine idling, slowly turn steering wheel Pulse generation
    SS+ (A29-7) -SS- (A29-8) ((2)) L - Y Steering sensor signal (To steering control ECU) Engine idling, slowly turn steering wheel Pulse generation
    SHRL (A29-9) - SGR (A29-20) B-W - R-Y Vehicle height signal (To height control sensor rear) Engine switch off Below 1 V
    Engine switch on (IG), bouncing the vehicle 0.5 to 4.5 V
    SHFL (A28-2) - SGF (A28- 17) G-B - G Vehicle height signal (To height control sensor front) Engine Switch off Below 1 V
    Engine Switch on (IG), bouncing the vehicle 0.5 to 4.5 V
    SBR (A29-10) - SGR (A29-20) W - R-Y Vehicle height signal (To height control sensor rear) Engine switch off Below 1 V
    Engine switch on (IG) 4.5 to 5.5 V
    SBF (A28-1) - SGF (A28- 17) G-R - G Vehicle height signal (To height control sensor front) Engine switch off Below 1 V
    Engine switch on (IG) 4.5 to 5.5 V
    SBR (A29-10) - SGR (A29-20) W - R-Y Vehicle height signal (To height control sensor rear) Always Below 1 V
    SBF (A28-1) - SGF (A28- 17) G-R - G Vehicle height signal (To height control sensor front) Always Below 1 V
    (1) w/o Variable Gear Ratio Steering System
    (2) w/ Variable Gear Ratio Steering System
    1. Waveform 1
      WAVEFORM 1 REFERENCE

      Item Contents
      Terminal SPDL - GND SPDR - GND
      Tool setting 5 V / DIV., 2 ms / DIV.
      Vehicle condition Vehicle is driving at approximately 30 km/h (19 mph)
      Fig 12: Waveform 1
      G04021492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2
      WAVEFORM 2 REFERENCE

      Item Contents
      Terminal BL1+ - BL1-
      BL2+ - BL2-
      BR1+ - BR1-
      BR2+ - BR2-
      Tool setting 10 V / div., 5 ms / div
      Vehicle condition
      • Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel more than 7.5°
      • If the value is not within the standard range, it is possible there is some defect on the vehicle side. Inspect the fuse, wire harness and connector.
      Fig 13: Waveform 2
      G04021493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3
      WAVEFORM 3 REFERENCE

      Item Contents
      Terminal LR1+ - LR1-
      LR2+ - LR2-
      LL1+ - LL1-
      LL2+ - LL2-
      Tool setting 10 V / div., 5 ms / div
      Vehicle condition
      • Engine running, light control switch in HEAD, driving at more than 10 km/h (6 mph) and turning the steering wheel more than 7.5°
      • If the value is not within the standard range, it is possible there is some defect on the vehicle side. Inspect the fuse, wire harness and connector.
      Fig 14: Waveform 3
      G04021494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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