METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    B004ERZN09

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      O3-2 (MSM+) - Body ground L - Body ground Steering pad switch signal Power switch on (IG), enter, back and top switches on steering pad switch assembly not pushed 4.3 to 6 V
      Power switch on (IG), enter switch on steering pad switch assembly pushed Below 0.6 V
      Power switch on (IG), back switch on steering pad switch assembly pushed 2.3 to 3.2 V
      Power switch on (IG), top switch on steering pad switch assembly pushed 1 to 2 V
      O3-3 (MSTI) - Body ground P - Body ground Steering pad switch signal Power switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed 4.3 to 6 V
      Power switch on (IG), up switch on steering pad switch assembly pushed 1 to 2 V
      Power switch on (IG), down switch on steering pad switch assembly pushed 2.3 to 3.2 V
      Power switch on (IG), right switch on steering pad switch assembly pushed 3.4 to 4.1 V
      Power switch on (IG), left switch on steering pad switch assembly pushed Below 0.6 V
      O3-4 (ODO) - Body ground L - Body ground ODO/TRIP switch signal Power switch on (IG), ODO/TRIP switch not pushed 4 to 6 V
      Power switch on (IG), ODO/TRIP switch pushed Below 1 V
      O3-6 (PBKL) - Body ground P - Body ground Front passenger seatbelt buckle switch signal Power switch on (IG), front passenger seat belt unfastened Below 1 V
      Power switch on (IG), front passenger seat belt fastened 11 to 14 V
      O3-7 (PODS) - Body ground V - Body ground Occupant detection sensor signal Power switch on (IG), front passenger seat not occupied Below 1 V
      Power switch on (IG), front passenger seat occupied 11 to 14 V
      O3-9 (S) - Body ground LG - Body ground Oil pressure signal Engine started 11 to 14 V
      Engine not started Below 1 V
      O3-12 (RRSB) - Body ground* R - Body ground Rear seat belt warning light RH signal Power switch on (IG), rear seat belt warning light RH off 11 to 14 V
      Power switch on (IG), rear seat belt warning light RH on Below 1 V
      O3-14 (RLSB) - Body ground* G - Body ground Rear seat belt warning light LH signal Power switch on (IG), rear seat belt warning light LH off 11 to 14 V
      Power switch on (IG), rear seat belt warning light LH on Below 1 V
      O3-15 (OILW) - Body ground GR - Body ground Engine oil level signal Power switch on (IG), engine oil level not low 11 to 14 V
      Power switch on (IG), engine oil level low Below 1 V
      O3-16 (WLVL) - Body ground V - Body ground Washer fluid level signal Power switch on (IG), washer fluid level not low 11 to 14 V
      Power switch on (IG), washer fluid level low Below 1 V
      O3-19 (+S) - Body ground L - Body ground Speed signal for other systems (Output) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)

      O3-20 (SI) - Body ground V - Body ground Speed signal for other system (Input) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)

      O3-21 (IG+) - Body ground B - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      O3-22 (B) - Body ground LG - Body ground Auxiliary battery Power switch off 11 to 14 V
      O3-25 (TR) - Body ground P - Body ground Light control rheostat switch signal Power switch on (IG), up switch and down switch of trip switch not pushed 4 to 6 V
      Power switch on (IG), up switch or down switch of trip switch pushed Below 1 V
      O3-26 (SW3) - Body ground W - Body ground Ground for trip switch Always Below 1 Ω
      O3-27 (FR) - K3-28 (FE) SB - GR Fuel level signal Power switch on (IG), fuel level full Below 1 V

      Power switch on (IG), fuel level low

      (fuel level warning light on)

      4.5 to 9 V
      O3-29 (CANH) LG CAN communication line - -
      O3-30 (CANL) B CAN communication line - -
      O3-31 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω
      O3-35 (RLMT) - Body ground* L - Body ground Rear seat belt buckle switch LH signal Power switch on (IG), rear seat belt LH unfastened Below 1 V
      Power switch on (IG), rear seat belt LH fastened 11 to 14 V
      O3-37 (RRMT) - Body ground* R - Body ground Rear seat belt buckle switch RH signal Power switch on (IG), rear seat belt RH unfastened Below 1 V
      Power switch on (IG), rear seat belt RH fastened 11 to 14 V
      O3-39 (ILL-) - Body ground BE - Body ground Illumination signal Headlight dimmer switch off Below 1 V
      Headlight dimmer switch in tail or head position Pulse generation
      O3-40 (EP) - Body ground BR - Body ground Ground Always Below 1 Ω
      O4-1 (B) - Body ground B - Body ground Auxiliary battery Power switch off 11 to 14 V
      O4-2 (HZSW) - Body ground W - Body ground Hazard warning signal switch signal (Input) Hazard warning signal switch not pressed 11 to 14 V
      Hazard warning signal switch pressed Below 1 V
      O4-3 (ER) - Body ground P - Body ground RH turn indicator light signal (Input) Power switch on (IG), RH turn signal switch off 11 to 14 V
      Power switch on (IG), RH turn signal switch on Below 1 V
      O4-4 (EL) - Body ground GR - Body ground LH turn indicator light signal (Input) Power switch on (IG), LH turn signal switch off 11 to 14 V
      Power switch on (IG), LH turn signal switch on Below 1 V
      O4-5 (TRNR) - Body ground R - Body ground RH turn indicator light signal (Output) Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      O4-7 (LR) - Body ground R - Body ground RH turn indicator light signal (Output) Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      O4-9 (MSCL) B Local bus communication line - -
      O4-10 (MSCH) R Local bus communication line - -
      O4-11 (TRNL) - Body ground LG - Body ground LH turn indicator light signal (Output) Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      O4-12 (HAZM) - Body ground B - Body ground Hazard warning signal switch signal (Output) Hazard warning signal switch not pressed 11 to 14 V
      Hazard warning signal switch pressed Below 1 V
      O4-13 (LL) - Body ground G - Body ground LH turn indicator light signal (Output) Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V

      • *: w/ Rear Seat Belt Warning


      • B004G2ZN02

        Waveform 1 (Reference):

        Item Condition
        Tester Connection
        • O3-19 (+S) - Body ground

        • O3-20 (SI) - Body ground

        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Power switch on (IG), wheel being rotated

        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.