METER / GAUGE SYSTEM TERMINALS OF ECU


  1. CHECK COMBINATION METER ASSEMBLY

    A0058Q7E03

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D66-1 (RLMT) - Body ground Y - Body ground Rear seat belt LH warning light signal Rear seat belt LH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat belt LH unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      D66-2 (RCMT) - Body ground P - Body ground Rear seat center belt warning light signal Rear seat center belt fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat center belt unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      D66-3 (RRMT) - Body ground B - Body ground Rear seat belt RH warning light signal Rear seat belt RH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat belt RH unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      D66-4 (STP1) - Body ground*3 R - Body ground Tire pressure warning reset switch signal Ignition switch ON, tire pressure warning reset switch pressed and held Below 1.5 V
      Ignition switch ON, tire pressure warning reset switch off 8 to 15 V
      D66-5 (SI) - Body ground V - Body ground Speed signal for other system (Input) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform)
      D66-6 (+S) - Body ground Y - Body ground Speed signal for other system (Output) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform)
      D66-7 (PKBI) - Body ground

      L - Body ground*1

      P - Body ground*2

      		 Front passenger side seat belt buckle switch signal Ignition switch ON, front passenger side seat belt fastened and front passenger seat occupied 11 to 14 V
      Ignition switch ON, front passenger side seat belt unfastened and front passenger seat occupied Below 1 V
      D66-9 (S) - Body ground Y - Body ground Engine oil pressure switch signal Ignition switch ON, low engine oil level warning light on Below 1 V
      Ignition switch ON, low engine oil level warning light off 11 to 14 V
      D66-11 (EFI) - Body ground P - Body ground MIL (malfunction indicator lamp) signal Ignition switch ON, MIL (malfunction indicator lamp) on Below 1 V
      Ignition switch ON, MIL (malfunction indicator lamp) off 11 to 14 V
      D66-12 (SW) - Body ground G - Body ground Brake system warning light (red indicator) signal Ignition switch ON, brake system warning light (red indicator) on Below 1 V
      Ignition switch ON, brake system warning light (red indicator) off 11 to 14 V
      D66-13 (CHG-) - Body ground Y - Body ground Charge warning light Ignition switch ON, charge warning light on Below 1 V
      Ignition switch ON, charge warning light off 11 to 14 V
      D66-16 (L) - Body ground V - Body ground Fuel sender gauge signal Fuel F (full tank) → E (empty) 4.5 to 9 V
      Ignition switch ON Below 1 V
      D66-15 (E) - Body ground BR - Body ground Fuel sender gauge signal Always Below 1 Ω
      D66-17 (TIRE) - Body ground*3 V - Body ground Tire pressure warning light signal Ignition switch ON, tire pressure warning light off Below 1 V
      Ignition switch ON, tire pressure warning light on 11 to 14 V
      D66-19 (STP2) - Body ground*6 V - Body ground AFS switch signal AFS switch off Below 1 V
      AFS switch on 11 to 14 V
      D66-21 (ET) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D66-24 (MSD) - Body ground Y - Body ground Rear seat inner belt signal (LH side) Ignition switch ON, rear LH seat belt unfastened Below 1 V
      Ignition switch ON, rear LH seat belt fastened 11 to 14 V
      D66-25 (MSTI) - Body ground P - Body ground Rear seat inner belt signal (Center) Ignition switch ON, rear center seat belt unfastened Below 1 V
      Ignition switch ON, rear center seat belt fastened 11 to 14 V
      D66-26 (MSFM) - Body ground B - Body ground Rear seat inner belt signal (RH side) Ignition switch ON, rear RH seat belt unfastened Below 1 V
      Ignition switch ON, rear RH seat belt fastened 11 to 14 V
      D66-28 (MSM+) - Body ground*7 GR - Body ground Steering pad switch signal Ignition switch ON, enter, trip and back switches on steering pad switch not pushed 4.3 to 5.2 V
      Ignition switch ON, enter switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, trip switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, back switch on steering pad switch pushed 2.3 to 3.4 V
      D66-28 (MSM+) - Body ground*8 GR - Body ground Steering pad switch signal Ignition switch ON, disp and trip switches on steering pad switch not pushed 4.3 to 5.2 V
      Ignition switch ON, disp switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, trip switch on steering pad switch pushed 1.0 to 2.2 V
      D66-31 (CANL) - Body ground W - Body ground CAN communication line - -
      D66-32 (CANH) - Body ground L - Body ground CAN communication line - -
      D66-33 (MSSL) - Body ground*7 BR - Body ground Steering pad switch signal Ignition switch ON, up, down, right and left switches on steering pad switch assembly not pushed 4.3 to 5.2 V
      Ignition switch ON, left switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, up switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, down switch on steering pad switch pushed 2.3 to 3.4 V
      Ignition switch ON, right switch on steering pad switch pushed 3.4 to 4.5 V
      D66-34 (TEMP) - Body ground W - Body ground Ambient temperature sensor signal Ambient temperature 25°C (77°F) 1.6 to 1.8 Ω*5
      D66-35 (TX1+) - Body ground G - Body ground Ambient temperature sensor gauge signal Always Below 1 Ω
      D66-36 (MSCH) - Body ground*4, *7 P - Body ground CAN communication line - -
      D66-37 (MSCL) - Body ground*4, *7 V - Body ground CAN communication line - -
      D66-39 (IG+) - Body ground P - Body ground IG switch signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      D66-40 (B) - Body ground W - Body ground Battery Always 11 to 14 V
      D140-1 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      D140-3 (HAZ) - Body ground GR - Body ground Hazard warning signal switch signal (Output) Hazard warning signal switch off 11 to 14 V
      Hazard warning signal switch on Below 1 V
      D140-4 (TX+) - Body ground B - Body ground Parking brake switch signal Ignition switch ON, electric parking brake switch off Pulse generation
      Ignition switch ON, electric parking brake switch on Pulse generation
      D140-8 (SW) - Body ground L - Body ground Turn signal switch (full turn) signal Headlight dimmer switch on (full turn) Below 1 V
      Headlight dimmer switch off 11 to 14 V
      D140-7 (LR) - Body ground L - Body ground RH turn indicator light signal (Output) Ignition switch ON, RH turn indicator light off Below 1 V
      Ignition switch ON, RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      D140-9 (ER) - Body ground G - Body ground RH turn indicator light signal (Input) Ignition switch ON, RH turn signal switch on Below 1 V
      Ignition switch ON, RH turn signal switch off 11 to 14 V
      D140-10 (EL) - Body ground LG - Body ground LH turn indicator light signal (Input) Ignition switch ON, LH turn signal switch on Below 1 V
      Ignition switch ON, LH turn signal switch off 11 to 14 V
      D140-13 (LL) - Body ground Y - Body ground LH turn indicator light signal (Output) Ignition switch ON, LH turn indicator light off Below 1 V
      Ignition switch ON, LH turn indicator light blinking 11 to 14 V ←→ Below 1 V

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Tire Pressure Warning System

      • *4: for Radio and Display Type

      • *5: The standard value changes according to the outside temperature.

      • *6: w/ AFS

      • *7: for Multi-information Display (Color Type)

      • *8: for Multi-information Display (Monochrome Type)

    2. A0052TBE05

      Using an oscilloscope, check waveform 1.

      Waveform (Reference)
      Item Condition
      Tester Connection

      • D66-5 (SI) - Body ground

      • D66-6 (+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.