METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A01GBE7N05

    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
      G16-2 (ILL-) - Body ground LG - Body ground Outside dimmer signal (LED) Ignition switch ON, light control rheostat position max Below 1 V
      Ignition switch ON, light control rheostat position min 11 to 14 V
      G16-5 (SI) - Body ground V - Body ground Speed signal for other systems (Input) Driving at approximately 20 km/h (12 mph)

      Pulse generation

      (See waveform 1)
      G16-6 (+S) - Body ground LG - Body ground Speed signal for other systems (Output) Driving at approximately 20 km/h (12 mph)

      Pulse generation

      (See waveform 1)
      G16-7 (P/SB) - Body ground*8 L - Body ground Passenger side seat belt signal Ignition switch ON, passenger side seat occupied, Seat belt fastened 11 to 14 V
      Ignition switch ON, passenger side seat occupied, seat belt unfastened Below 1 V
      G16-8 (S) - Body ground*1 R - Body ground Level warning switch signal Ignition switch ON, level warning switch off 11 to 14 V
      Ignition switch ON, level warning switch on Below 1 V
      G16-9 (S) - Body ground*2*6 L - Body ground Engine oil pressure switch signal Ignition switch ON, engine oil pressure switch off 11 to 14 V
      Ignition switch ON, engine oil pressure switch on Below 1 V
      G16-10 (WLVL) - Body ground*7 LG - Body ground Level warning switch signal Ignition switch ON, washer level indicator light off 11 to 14 V
      Ignition switch ON, washer level indicator light on Below 1 V
      G16-11 (CHK) - Body ground R - Body ground MIL signal Ignition switch ON, MIL off 11 to 14 V
      Ignition switch ON, MIL on Below 1 V
      G16-12 (SW) - Body ground Y - Body ground Brake fluid level warning switch signal Ignition switch ON, brake fluid level warning switch off 11 to 14 V
      Ignition switch ON, brake fluid level warning switch on Below 1 V
      G16-13 (CHG-) - Body ground L - Body ground Charge warning light signal Ignition switch ON, charge warning light off 11 to 14 V
      Ignition switch ON, charge warning light on Below 1 V
      G16-14 (-) - Body ground BR - Body ground High beam indicator light ground Always Below 1 Ω
      G16-15 (E) - Body ground GR - Body ground Fuel sender gauge ground Always Below 1 Ω
      G16-16 (L) - Body ground SB - Body ground Fuel sender gauge signal Fuel level F Below 1 V
      Fuel level E 4.5 to 9 V
      G16-19 (+) - Body ground R - Body ground High beam indicator light signal Ignition switch ON, high beam indicator light off Below 1 V
      Ignition switch ON, high beam indicator light on 11 to 14 V
      G16-21 (ET) - Body ground BR - Body ground Ground Always Below 1 Ω
      G16-24 (RLSB) - Body ground*1 G - Body ground Rear seat belt LH buckle switch signal Rear seat belt LH fastened Below 1 V
      Rear seat belt LH unfastened 11 to 14 V
      G16-25 (RCSB) - Body ground*1 B - Body ground Rear seat center belt buckle switch signal Rear seat center belt fastened Below 1 V
      Rear seat center belt unfastened 11 to 14 V
      G16-26 (RRSB) - Body ground*1 W - Body ground Rear seat belt RH buckle switch signal Rear seat belt RH fastened Below 1 V
      Rear seat belt RH unfastened 11 to 14 V
      G16-27 (OILW) - Body ground*2 G - Body ground Engine oil level sensor signal Ignition switch ON, engine oil level warning display off 11 to 14 V
      Ignition switch ON, engine oil level warning display on Below 1 V
      G16-28 (STRG) - Body ground L - Body ground Steering pad switch (DISP) signal Ignition switch ON, steering pad switch (DISP) off 4.4 to 5.6 V
      Ignition switch ON, steering pad switch (DISP) on Below 1 V
      G16-29 (HAZ) - Body ground BE - Body ground Turn signal switch (full turn) signal Ignition switch ON, turn signal switch (full turn) off 4.4 to 5.6 V
      Ignition switch ON, turn signal switch (full turn) on Below 1 V
      G16-35 (TX1+) - Body ground G - Body ground Thermistor signal Ignition switch ON 4.4 to 5.6 V
      G16-34 (TX1-) - Body ground W - Body ground Thermistor signal ground Always Below 1 V
      G16-39 (IG+) - Body ground

      B - Body ground*3

      P - Body ground*4

      		 Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      G16-40 (B) - Body ground Y - Body ground Battery Always 11 to 14 V
      G17-1 (B) - Body ground L - Body ground Battery Always 11 to 14 V
      G17-3 (HAZ) - Body ground GR - Body ground Hazard warning switch signal Ignition switch ON, hazard warning switch not pressed 11 to 14 V
      Ignition switch ON, hazard warning switch pressed Below 1 V
      G17-4 (LVWG) - Body ground LG - Body ground Headlight beam level control system warning light signal Ignition switch ON, headlight beam level control system warning light off 11 to 14 V
      Ignition switch ON, headlight beam level control system warning light on Below 1 V
      G17-7 (LR) - Body ground L - Body ground Turn signal light (RH) signal Ignition switch ON, turn signal light (RH) off Below 1 V
      Ignition switch ON, turn signal light (RH) on 11 to 14 V
      G17-9 (ER) - Body ground SB - Body ground Turn signal switch (RH) signal Ignition switch ON, turn signal switch (RH) off 11 to 14 V
      Ignition switch ON, turn signal switch (RH) on Below 1 V
      G17-10 (EL) - Body ground LG - Body ground Turn signal switch (LH) signal Ignition switch ON, turn signal switch (LH) off 11 to 14 V
      Ignition switch ON, turn signal switch (LH) on Below 1 V
      G17-11 (S) - Body ground*5 GR - Body ground Rear fog indicator light signal Ignition switch ON, rear fog indicator light off Below 1 V
      Ignition switch ON, rear fog indicator light on 11 to 14 V
      G17-12 (FOG) - Body ground*5 Y - Body ground Front fog indicator light signal Ignition switch ON, front fog indicator light off Below 1 V
      Ignition switch ON, front fog indicator light on 11 to 14 V
      G17-13 (LL) - Body ground Y - Body ground Turn signal light (LH) signal Ignition switch ON, turn signal light (LH) off Below 1 V
      Ignition switch ON, turn signal light (LH) on 11 to 14 V

      • *1: w/ Rear Seat Belt Warning System

      • *2: Engine Type Diesel

      • *3: w/o Stop and Start System

      • *4: w/ Stop and Start System

      • *5: for Segment Display Type

      • *6: except 1AD-FTV

      • *7: w/ Washer Level Warning System

      • *8: w/o Panic Switch

    2. A01GDD9N01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Condition
      Tester Connection

      G16-5 (SI) - Body ground

      G16-6 (+S) - Body ground
      Tool Setting 5 V/DIV., 20 ms./DIV.
      Vehicle Condition Driving at approximately 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.