LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU)

    A015ZOCE09
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    2E-1 - Body ground W - Body ground Power source circuit Always 11 to 14 V
    2E-2 - Body ground W-L - Body ground Power source circuit Always 11 to 14 V
    2E-3 - Body ground B-Y - Body ground Engine switch signal circuit Engine switch on (IG) 11 to 14 V
    2E-3 - Body ground B-Y - Body ground Engine switch signal circuit Engine switch off Below 1 V
    2E-4 - Body ground G-R - Body ground Power source circuit Always 11 to 14 V
    2F-1 - Body ground W-B - Body ground Ground Always Below 1 V
    2F-5 - Body ground L - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    2F-6 - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    2G-4 - Body ground G - Body ground

    Taillight circuit

    (To parking light)

    		 Light control switch in TAIL 11 to 14 V
    2G-4 - Body ground G - Body ground

    Taillight circuit

    (To parking light)

    		 Light control switch OFF Below 1 V
    2G-5 - Body ground R-L - Body ground

    Daytime running light circuit

    (To DRL/parking)

    		 Daytime running light ON 11 to 14 V
    2G-5 - Body ground R-L - Body ground

    Daytime running light circuit

    (To DRL/parking)

    		 Daytime running light OFF Below 1 V
    2G-6 - Body ground LG - Body ground

    Fog light circuit

    (To front fog light RH)

    		 Front fog light ON 11 to 14 V
    2G-6 - Body ground LG - Body ground

    Fog light circuit

    (To front fog light RH)

    		 Front fog light OFF Below 1 V
    2G-7 - Body ground G-R - Body ground

    Fog light circuit

    (To front fog light LH)

    		 Front fog light ON 11 to 14 V
    2G-7 - Body ground G-R - Body ground

    Fog light circuit

    (To front fog light LH)

    		 Front fog light OFF Below 1 V
    2G-12 - Body ground R-W - Body ground

    Hi-beam circuit

    (To headlight RH)

    		 Headlight dimmer switch in HI 11 to 14 V
    2G-12 - Body ground R-W - Body ground

    Hi-beam circuit

    (To headlight RH)

    		 Headlight dimmer switch in HEAD Below 1 V
    2G-13 - Body ground R-Y - Body ground

    Hi-beam circuit

    (To headlight LH)

    		 Headlight dimmer switch in HI 11 to 14 V
    2G-13 - Body ground R-Y - Body ground

    Hi-beam circuit

    (To headlight LH)

    		 Headlight dimmer switch in HEAD Below 1 V

  2. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

    A0161GCE27
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    RD-7 (GND2) - Body ground W-B - Body ground Ground Always Below 1 V
    RA-20 (MPX1) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    RK-5 (BECU) - Body ground G-R - Body ground Multiplex communication power source circuit Always 11 to 14 V
    RL-7 (HRLY) - Body ground R-W - Body ground

    HEAD signal

    (To HEAD relay)

    		 Light control switch OFF or in TAIL 11 to 14 V
    RL-7 (HRLY) - Body ground R-W - Body ground

    HEAD signal

    (To HEAD relay)

    		 Light control switch in HEAD Below 1 V
    J75-21 (MPX2) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    J74-4 (CLTE) - Body ground W - Body ground Automatic light control sensor ground circuit Always Below 1 V
    J74-5 (CLTS) - Body ground R - Body ground Automatic light control sensor ground circuit Engine switch off Below 1 V
    J74-5 (CLTS) - Body ground R - Body ground Automatic light control sensor ground circuit Engine switch on (IG), lights control switch in AUTO, headlights come ON Signal waveform
    J74-6 (CLTB) - Body ground GR - Body ground Automatic light control sensor power source circuit Engine switch off Below 1 V
    J74-6 (CLTB) - Body ground GR - Body ground Automatic light control sensor power source circuit Engine switch on (IG) 11 to 14 V
    J74-23 (HEAD) - Body ground L - Body ground

    HEAD signal

    (From light control switch)

    		 Light control switch OFF or in TAIL 11 to 14 V
    J74-23 (HEAD) - Body ground L - Body ground

    HEAD signal

    (From light control switch)

    		 Light control switch in HEAD Below 1 V
    RA-15 (ALTB) - Body ground SB - Body ground Power source circuit Always 11 to 14 V
    RD-1 (TRLY) - Body ground Y - Body ground HAED signal (to HAED relay) Light control switch OFF 11 to 14 V
    RD-1 (TRLY) - Body ground Y - Body ground HAED signal (to HAED relay) Light control switch in TAIL Below 1 V
    J74-2 (HAZ) - Body ground Y - Body ground HAZARD signal (From HAZARD switch) HAZARD switch ON Below 1 V
    J74-2 (HAZ) - Body ground Y - Body ground HAZARD signal (From HAZARD switch) HAZARD switch OFF 11 to 14 V

  3. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

    A0160R6E25
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    LD-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    LA-15 (TR) - Body ground P - Body ground

    RH side turn signal

    (To turn signal flasher assembly)

    		 Engine switch on (IG) and turn signal switch off 9 to 14 V
    LA-15 (TR) - Body ground P - Body ground

    RH side turn signal

    (To turn signal flasher assembly)

    		 Engine switch on (IG) and turn signal switch (right turn) on Below 1 V
    LA-16 (TL) - Body ground BR - Body ground

    LH side turn signal

    (To turn signal flasher assembly)

    		 Engine switch on (IG) and turn signal switch off 9 to 14 V
    LA-16 (TL) - Body ground BR - Body ground

    LH side turn signal

    (To turn signal flasher assembly)

    		 Engine switch on (IG) and turn signal switch (left turn) on Below 1 V
    LD-8 (SGND) - Body ground W-B - Body ground Ground Always Below 1 V
    LD-9 (SGND) - Body ground W-B - Body ground Ground Always Below 1 V
    LD-18 (MPXB) - Body ground LG - Body ground Multiplex communication power source circuit Always 11 to 14 V
    LJ-25 (RFRL) - Body ground BE - Body ground

    Rear fog light circuit

    (To rear fog lights)

    		 Rear fog lights ON 11 to 14 V
    LJ-25 (RFRL) - Body ground BE - Body ground

    Rear fog light circuit

    (To rear fog lights)

    		 Rear fog lights OFF Below 1 V
    Q3-15 (MPX1) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    A30-13 (ALTL) - Body ground GR-R - Body ground Generator signal circuit Engine running 11 to 14 V
    A30-13 (ALTL) - Body ground GR-R - Body ground Generator signal circuit Engine stopped, Engine switch on (IG) Below 1 V
    A30-14 (WNG) - Body ground V-G - Body ground

    Automatic headlight beam level control warning signal

    (From headlight leveling ECU assembly)

    		 Automatic headlight beam level control warning message displayed Below 1 V
    A30-14 (WNG) - Body ground V-G - Body ground

    Automatic headlight beam level control warning signal

    (From headlight leveling ECU assembly)

    		 Automatic headlight beam level control warning message not displayed 11 to 14 V
    A30-17 (MPX2) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform

  4. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY

    A015ZZYE20
    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    J26-1 (B) - J26-5 (E) LG - W-B

    Power source circuit

    (From battery)

    		 Always 11 to 14 V
    J26-2 (IG) - J26-5 (E) B - W-B

    Engine switch signal circuit

    (From engine switch)

    		 Engine switch off Below 1 V
    J26-2 (IG) - J26-5 (E) B - W-B

    Engine switch signal circuit

    (From engine switch)

    		 Engine switch on (IG) 11 to 14 V
    J26-4 (HEAD) - Body ground L - Body ground Light control switch HEAD signal Light control switch not in HEAD 11 to 14 V
    J26-4 (HEAD) - Body ground L - Body ground Light control switch HEAD signal Light control switch in HEAD Below 1 V
    J26-5 (E) - Body ground W-B - Body ground Ground Always Below 1 V
    J26-6 (MPX1) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform
    J26-7 (MPX2) - Body ground GR - Body ground Multiplex communication signal circuit Engine switch on (IG) Signal waveform

  5. CHECK HEADLIGHT LEVELING ECU ASSEMBLY

    A01625BE06
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A64-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 V
    A64-5 (SPDL) - A64-1 (E1) R-L - W-B

    Vehicle speed signal

    (From skid control ECU)

    		 Vehicle driving at approx. 30 km/h (19 mph)

    Pulse generation

    (see waveform 1)
    A64-6 (SPDR) - A64-1 (E1) G-W - W-B

    Vehicle speed signal

    (From skid control ECU)

    		 Vehicle driving at approx. 30 km/h (19 mph)

    Pulse generation

    (see waveform 1)
    A64-7 (B2) - A64-1 (E1) R-W - W-B Headlight relay operation signal Light control switch in HEAD position Below 1 V
    A64-7 (B2) - A64-1 (E1) R-W - W-B Headlight relay operation signal Light control switch off 11 to 14 V
    A64-8 (CHG-) - A64-1 (E1) GR-R - W-B Generator signal circuit Engine running 11 to 14 V
    A64-8 (CHG-) - A64-1 (E1) GR-R - W-B Generator signal circuit Engine stopped, engine switch on (IG) Below 1 V
    A64-10 (LR2+) - A64-9 (LR2-) P - LG

    Headlight beam level control motor RH

    (Operation signal circuit)

    		 Engine switch off Below 1 V
    A64-10 (LR2+) - A64-9 (LR2-) P - LG

    Headlight beam level control motor RH

    (Operation signal circuit)

    		 Engine running, light control switch in HEAD position, vehicle height changed and maintained at new height for more than 1 second.

    Pulse generation

    (see waveform 2)
    A64-12 (LR1+) - A64-11 (LR1-) L - BR-W

    Headlight beam level control motor RH

    (Operation signal circuit)

    		 Engine switch OFF Below 1 V
    A64-12 (LR1+) - A64-11 (LR1-) L - BR-W

    Headlight beam level control motor RH

    (Operation signal circuit)

    		 Engine running, light control switch in HEAD position, vehicle height changed and maintained at new height for more than 1 second.

    Pulse generation

    (see waveform 2)
    A64-14 (IG) - A64-1 (E1) B-O - W-B

    Power source circuit

    (To engine switch)

    		 Engine switch off Below 1 V
    A64-14 (IG) - A64-1 (E1) B-O - W-B

    Power source circuit

    (To engine switch)

    		 Engine switch on (IG) 11 to 14 V
    A64-16 (SGF) - A64-1 (E1) G-R - W-B

    Front height control sensor

    (Ground circuit)

    		 Always Below 1 V
    A64-17 (SGR) - A64-1 (E1) R-Y - W-B

    Rear height control sensor

    (Ground circuit)

    		 Always Below 1 V
    A64-18 (SHFL) - A64-1 (E1) G-Y - W-B

    Front height control sensor

    (Signal circuit)

    		 Engine switch off Below 1 V
    A64-18 (SHFL) - A64-1 (E1) G-Y - W-B

    Front height control sensor

    (Signal circuit)

    		 Engine switch on (IG) 0.5 to 4.5 V
    A64-19 (SHRL) - A64-1 (E1) B-W - W-B

    Rear height control sensor

    (Signal circuit)

    		 Engine switch off Below 1 V
    A64-19 (SHRL) - A64-1 (E1) B-W - W-B

    Rear height control sensor

    (Signal circuit)

    		 Engine switch on (IG) 0.5 to 4.5 V
    A64-20 (SBF) - A64-1 (E1) R-B - W-B

    Front height control sensor

    (Power source circuit)

    		 Engine switch off Below 1 V
    A64-20 (SBF) - A64-1 (E1) R-B - W-B

    Front height control sensor

    (Power source circuit)

    		 Engine switch on (IG) Approx. 5.0 V
    A64-21 (SBR) - A64-1 (E1) W - W-B

    Rear height control sensor

    (Power source circuit)

    		 Engine switch off Below 1 V
    A64-21 (SBR) - A64-1 (E1) W - W-B

    Rear height control sensor

    (Power source circuit)

    		 Engine switch on (IG) Approx. 5.0 V
    A64-26 (WNG) - A64-1 (E1) V-G - W-B

    Headlight beam level warning indicator signal

    (To main body ECU LH)

    		 Headlight beam level warning indicator comes on Below 1 V
    A64-26 (WNG) - A64-1 (E1) V-G - W-B

    Headlight beam level warning indicator signal

    (To main body ECU LH

    		 Headlight beam level warning indicator goes off 11 to 14 V
    A64-29 (LL2+) - A64-28 (LL2-) Y-R - V-R

    Headlight beam level control motor LH

    (Operation signal circuit)

    		 Engine switch off Below 1 V
    A64-29 (LL2+) - A64-28 (LL2-) Y-R - V-R

    Headlight beam level control motor LH

    (Operation signal circuit)

    		 Engine running, light control switch in HEAD position, vehicle height changed and maintained at new height for more than 1 second.

    Pulse generation

    (see waveform 2)
    A64-31 (LL1+) - A64-30 (LL1-) R-G - G

    Headlight beam level control motor LH

    (Operation signal circuit)

    		 Engine switch off Below 1 V
    A64-31 (LL1+) - A64-30 (LL1-) R-G - G

    Headlight beam level control motor LH

    (Operation signal circuit)

    		 Engine running, light control switch in HEAD position, vehicle height changed and maintained at new height for more than 1 second.

    Pulse generation

    (see waveform 2)

    1. A01620Q

      Waveform 1

      Item Contents
      Terminal

      A64-5 (SPDL) - A64-1 (E1)

      A64-6 (SPDR) - A64-1 (E1)
      Tool setting 5 V / DIV., 2 ms / DIV.
      Vehicle condition Vehicle is driving at approximately 30 km/h (19 mph)
    2. A0163AP

      Waveform 2

      Item Contents
      Terminal

      A64-12 (LR1+) - A64-11 (LR1-)

      A64-10 (LR2+) - A64-9 (LR2-)

      A64-31 (LL1+) - A64-30 (LL1-)

      A64-29 (LL2+) - A64-28 (LL2-)
      Tool setting 10 V / DIV., 5 ms / DIV.
      Vehicle condition

      • Engine running, light control switch in HEAD position, vehicle height changed and maintained at new height for more than 1 second.

      • If the value is not within the standard range, it is possible there is some malfunction on the vehicle side. Inspect the fuse, wire harness and connector.