METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A00419AE08

    1. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L23-1 (TIMR) - Body ground G - Body ground Charge timer indicator light signal Power switch on (IG), charge timer indicator light off Below 1 V
      Power switch on (IG), charge timer indicator light on 11 to 14 V
      L23-2 (TC O)*1 - Body ground G - Body ground Pattern select switch assembly signal (Unit change switch) Unit change switch not pressed 11 to 14 V
      Unit change switch pressed Below 1 V
      L23-5 (S) - Body ground R - Body ground Oil pressure switch signal Power switch on (IG), engine not operating Below 1 V
      Power switch on (IG), engine operating 11 to 14 V
      L23-6 (LVWG)*2 - Body ground L - Body ground Headlight leveling indicator light signal Power switch on (IG), headlight leveling indicator light off 11 to 14 V
      Power switch on (IG), headlight leveling indicator light on Below 1 V
      L23-7 (+S) - Body ground V - Body ground Speed signal for other systems (Output) Power switch on (IG), front wheel turns slowly

      Pulse generation

      (See waveform 1)
      L23-8 (SI) - Body ground V - Body ground Speed signal (Input) Power switch on (IG), front wheel turns slowly

      Pulse generation

      (See waveform 1)
      L23-9 (E2) - Body ground G - Body ground Ground (Coolant temperature sensor ground) Always Below 1 Ω
      L23-10 (CANH) - Body ground P - Body ground CAN communication signal - -
      L23-11 (CANL) - Body ground W - Body ground CAN communication signal - -
      L23-12 (HOUR) - Body ground B - Body ground Satellite switch set signal (Hour adjust switch) Hour adjust switch not pressed 11 to 14 V
      Hour adjust switch pressed Below 1 V
      L23-13 (MIN) - Body ground B - Body ground Satellite switch set signal (Minute adjust switch) Minute adjust switch not pressed 11 to 14 V
      Minute adjust switch pressed Below 1 V
      L23-14 (L) - Body ground B - Body ground Fuel level signal Power switch on (IG), fuel level warning light off Below 1 V
      Power switch on (IG), fuel level warning light on 3 to 7 V
      L23-15 (ES 2) - Body ground W - Body ground Ground (Fuel ground) Always Below 1 Ω
      L23-16 (TWS3) - Body ground B - Body ground Coolant temperature sensor signal Power switch on (IG), coolant temperature hot warning light on 4.5 to 5.5 V
      Power switch on (IG), coolant temperature hot warning light off Below 1 V
      L23-17 (RST) - Body ground R - Body ground Satellite Switch Set signal (Set switch) Set switch not pressed 11 to 14 V
      Set switch pressed Below 1 V
      L23-18 (B) - Body ground R - Body ground Battery Power switch off 11 to 14 V
      L23-19 (IG+) - Body ground L - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L23-20 (IG2) - Body ground G - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      L23-21 (PBLT) - Body ground Y - Body ground Front passenger side seat belt warning light signal Power switch on (IG), front passenger side seat belt warning light off 11 to 14 V
      Power switch on (IG), front passenger side seat belt warning light blinks Below 1 V ←→ 11 to 14 V
      L23-22 (LP) - Body ground B - Body ground Security indicator light signal Power switch on (IG), security indicator light off Below 2 V
      Security indicator light blinks Below 1 V ←→ 11 to 14 V
      L23-24 (SW) - Body ground P - Body ground Front passenger side seat belt buckle switch signal Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt unfastened Below 1 V
      Power switch on (IG), sit on the front passenger seat, and front passenger side seat belt fastened 11 to 14 V
      L23-25 (EFI) - Body ground LG - Body ground MIL (Check engine warning light) signal Power switch on (IG), MIL (Check engine warning light) off 11 to 14 V
      Power switch on (IG), MIL (Check engine warning light) comes on Below 1 V
      L23-26 (B) - Body ground Y - Body ground Turn LH indicator light signal Power switch on (IG), turn LH indicator light off 11 to 14 V
      Power switch on (IG), turn LH indicator light blinks Below 1 V ←→ 11 to 14 V
      L23-27 (B) - Body ground G - Body ground Turn RH indicator light signal Power switch on (IG), turn RH indicator light off 11 to 14 V
      Power switch on (IG), turn RH indicator light blinks Below 1 V ←→ 11 to 14 V
      L23-29 (STRG) - Body ground G - Body ground Steering pad switch signal Always Pulse generation
      L23-30 (ES) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 Ω
      L23-32 (RRSB)*3 - Body ground R - Body ground Rear RH seat belt buckle switch signal Power switch on (IG), rear RH seat belt unfastened Below 1 V
      Power switch on (IG), rear RH seat belt fastened 11 to 14 V
      L23-33 (RCSB)*3 - Body ground L - Body ground Rear center seat belt buckle switch signal Power switch on (IG), rear center seat belt unfastened Below 1 V
      Power switch on (IG), rear center seat belt fastened 11 to 14 V
      L23-34 (RLSB)*3 - Body ground Y - Body ground Rear LH seat belt buckle switch signal Power switch on (IG), rear LH seat belt unfastened Below 1 V
      Power switch on (IG), rear LH seat belt fastened 11 to 14 V
      L23-35 (TC) - Body ground G - Body ground Light control rheostat signal (Tail cancel switch) Power switch on (IG), light control rheostat position except below 1 to 6 V
      Power switch on (IG), turn the light control rheostat fully upwards Below 1 V
      L23-36 (SW1) - Body ground B - Body ground Light control rheostat signal Always 4 to 6 V
      L23-37 (SW2) - Body ground B - Body ground Light control rheostat signal Power switch on (IG), light control rheostat except on tail cancel position

      1 to 6 V

      (Gradually change)
      L23-38 (SW3) - Body ground R - Body ground Light control rheostat signal (Rheostat ground) Always Below 1 Ω
      L24-1 (12V) - Body ground B - Body ground Power switch signal Power switch off 11 to 14 V
      L24-4 (GND) - Body ground W - Body ground Ground Always Below 1 Ω
      L24-5 (BKR) - Body ground P - Body ground Headup display illumination signal Power switch on (IG) Pulse generation
      L24-6 (LAT) - Body ground R - Body ground Headup display dot illumination timing signal Power switch on (IG) Pulse generation
      L24-7 (CLKH) - Body ground R - Body ground Clock signal Always Pulse generation
      L24-8 (CLKL) - Body ground G - Body ground Clock signal Always Pulse generation
      L24-9 (SIH) - Body ground G - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L24-10 (SIL) - Body ground R - Body ground Headup display dot signal Power switch on (IG) Pulse generation
      L24-11 (WE) - Body ground L - Body ground Headup display dot illumination signal Power switch on (IG), headup display illuminated Pulse generation
      L24-14 (STP1) - Body ground V - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L24-15 (STP2) - Body ground LG - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L24-16 (STP3) - Body ground B - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L24-17 (STP4) - Body ground W - Body ground Stepper motor signal Power switch on (IG) Pulse generation
      L25-1 (NVSW) - L25-2 (E) Y - BE Navigation system display select switch signal Turn the power switch on (IG), HUD navi switch not pressed Below 1 V
      Turn the power switch on (IG), HUD navi switch pressed 11 to 14 V
      L25-2 (E) - Body ground BE - Body ground Ground Always Below 1 Ω
      L25-3 (HUDI) - Body ground W - Body ground Headup display indicator light signal Turn the power switch on (IG), HUD main switch indicator light goes off Below 1 V
      Turn the power switch on (IG), HUD main switch indicator light comes on 11 to 14 V
      L25-4 (HUDD) - L25-2 (E) R - BE Headup display position down switch signal Turn the power switch on (IG), HUD tilt down switch not pressed Below 1 V
      Turn the power switch on (IG), HUD tilt down switch pressed 11 to 14 V
      L25-7 (HUDU) - L25-2 (E) P - BE Headup display position up switch signal Turn the power switch on (IG), HUD tilt up switch not pressed Below 1 V
      Turn the power switch on (IG), HUD tilt up switch pressed 11 to 14 V
      L25-8 (HUDO) - L25-2 (E) B - BE Headup display mode select switch signal Turn the power switch on (IG), headup display main switch not pressed Below 1 V
      Turn the power switch on (IG), headup display main switch pressed 11 to 14 V
      L25-9 (IIND) - Body ground BE - Body ground Navigation system indicator light signal Turn the power switch on (IG), HUD navi switch indicator light goes off Below 1 V
      Turn the power switch on (IG), HUD navi switch indicator light comes on 11 to 14 V

      • *1: w/ Unit change switch

      • *2: w/ Automatic headlight beam level control system

      • *3: w/ Rear seat belt warning

    2. A0042NIE03

      Waveform 1 (Reference):

      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      Tech Tips

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

  2. COMBINATION METER ASSEMBLY INNER CIRCUIT

    A0044BRE01
    A00434UE01
    A00407PE01
    Terminal No. (Symbol) Wire Harness Side
    L23 1 (TIMR) Plugin Charge Control ECU Assembly
    2 (TC O)*1 Pattern Select Switch Assembly
    3 -
    4 -
    5 (S) Oil Pressure Switch
    6 (LVWG)*2 Headlight Leveling ECU Assembly
    7 (+S) Each part that uses the speed signal
    8 (SI) Skid Control ECU
    9 (E2) Ground (Coolant Temperature Sensor Ground)
    10 (CANH) CAN Communication Line
    11 (CANL) CAN Communication Line
    12 (HOUR) Satellite Switch Set
    13 (MIN) Satellite Switch Set
    14 (L) Fuel Sender Gauge Assembly
    15 (ES 2) Fuel Sender Gauge Assembly
    16 (TWS3) Engine Coolant Temperature Sensor
    17 (RST) Satellite Switch Set
    18 (B) ECU-B Fuse
    19 (IG+) GAUGE Fuse
    20 (IG2) MET Fuse
    21 (PBLT) Telltale Light Assembly
    22 (LP) Certification ECU (Smart Key ECU Assembly)
    23 -
    24 (SW) Occupant Detection Sensor and Front Seat Inner Belt Assembly
    25 (EFI) ECM
    26 (B) Turn Signal Flasher Assembly
    27 (B) Turn Signal Flasher Assembly
    28 -
    29 (STRG) Steering Pad Switch RH
    30 (ES) Ground
    31 -
    32 (RRSB)*3 Rear Seat Inner Belt Assembly RH
    33 (RCSB)*3 Rear Seat Inner with Center Belt Assembly LH
    34 (RLSB)*3 Rear Seat Inner with Center Belt Assembly LH
    35 (TC) Light Control Rheostat
    36 (SW1) Light Control Rheostat
    37 (SW2) Light Control Rheostat
    38 (SW3) Light Control Rheostat
    39 -
    40 -
    L24 1 (12V) Headup Display (Combination Meter Mirror ECU)
    2 -
    3 -
    4 (GND) Headup Display (Combination Meter Mirror ECU)
    5 (BKR) Headup Display (Combination Meter Mirror ECU)
    6 (LAT) Headup Display (Combination Meter Mirror ECU)
    7 (CLKH) Headup Display (Combination Meter Mirror ECU)
    8 (CLKL) Headup Display (Combination Meter Mirror ECU)
    9 (SIH) Headup Display (Combination Meter Mirror ECU)
    10 (SIL) Headup Display (Combination Meter Mirror ECU)
    11 (WE) Headup Display (Combination Meter Mirror ECU)
    12 -
    13 -
    14 (STP1) Headup Display (Combination Meter Mirror ECU)
    15 (STP2) Headup Display (Combination Meter Mirror ECU)
    16 (STP3) Headup Display (Combination Meter Mirror ECU)
    17 (STP4) Headup Display (Combination Meter Mirror ECU)
    18 -
    19 -
    20 -
    21 -
    22 -
    23 -
    24 -
    L25 1 (NVSW) Satellite Switch Set
    2 (E) Satellite Switch Set
    3 (HUDI) Satellite Switch Set
    4 (HUDD) Satellite Switch Set
    5 -
    6 -
    7 (HUDU) Satellite Switch Set
    8 (HUDO) Satellite Switch Set
    9 (IIND) Satellite Switch Set
    10 -
    11 -
    12 -
    13 -
    14 -
    15 -
    16 -

    • *1: w/ Unit change switch

    • *2: w/ Automatic headlight beam level control system

    • *3: w/ Rear seat belt warning