METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A012GZ1E11

    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
      E46-1 (RLMT)*1 - Body ground G - Body ground Rear seat belt indicator light LH signal Ignition switch ON, rear seat belt indicator light LH off 11 to 14 V
      Ignition switch ON, rear seat belt indicator light LH on Below 1 V
      E46-2 (RCMT)*1 - Body ground L - Body ground Rear seat belt indicator light center signal Ignition switch ON, rear seat belt indicator light center off 11 to 14 V
      Ignition switch ON, rear seat belt indicator light center on Below 1 V
      E46-3 (RRMT)*1 - Body ground R - Body ground Rear seat belt indicator light RH signal Ignition switch ON, rear seat belt indicator light RH off 11 to 14 V
      Ignition switch ON, rear seat belt indicator light RH on Below 1 V
      E46-5 (SI) - Body ground R - Body ground Speed signal for other system (Input) Ignition switch ON, wheel being rotated Pulse generation (See waveform 1)
      E46-6 (+S) - Body ground V - Body ground Speed signal for other system (Output) Ignition switch ON, wheel being rotated Pulse generation (See waveform 1)
      E46-7 (P/SB) - Body ground L - Body ground Front passenger seat belt buckle switch signal Ignition switch ON, front passenger seat occupied, and front passenger seat belt unfastened Below 1 V
      Ignition switch ON, front passenger seat occupied, and front passenger seat belt fastened 11 to 14 V
      E46-8 (S)*2 - Body ground GR - Body ground Fuel sediment warning signal Ignition switch ON, fuel sediment warning light off or "DRAIN WATER FROM FUEL FILTER" not displayed 11 to 14 V
      Ignition switch ON, fuel sediment warning light on or "DRAIN WATER FROM FUEL FILTER" displayed Below 1 V
      E46-9 (S)*3 - Body ground V - Body ground Oil pressure signal Idling 11 to 14 V
      Ignition switch ON Below 1 V
      E46-11 (CHK) - Body ground LG - Body ground MIL (Check engine warning light) signal Ignition switch ON, MIL off 11 to 14 V
      Ignition switch ON, MIL on Below 1 V
      E46-12 (SW) - Body ground Y - Body ground Brake fluid level signal Ignition switch ON, brake fluid level not low 11 to 14 V
      Ignition switch ON, brake fluid level low Below 1 V
      E46-13 (CHG-)*4 - Body ground G - Body ground Charge warning signal Ignition switch ON, charge warning light off or "Charge warning (Charge warning symbol)" not displayed Below 1 V
      Ignition switch ON, charge warning light on or "Charge warning (Charge warning symbol)" displayed 11 to 14 V
      E46-14 (-) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E46-16 (L) - E46-15 (E) V - BR Fuel level signal Ignition switch ON, fuel level warning off Below 1 V
      Ignition switch ON, fuel level warning on 4.5 to 9 V
      E46-19 (+) - Body ground R - Body ground High beam signal Ignition switch ON, high beam off Below 1 V
      Ignition switch ON, high beam on 11 to 14 V
      E46-21 (ET) - Body ground BR - Body ground Ground Always Below 1 Ω
      E46-22 (BRQ)*5 - Body ground GR - Body ground Transmission control ECU assembly communication line Always Below 1.44 V
      E46-23 (TX+)*5 - Body ground LG - Body ground Transmission control ECU assembly communication line Ignition switch ON Pulse generation (See waveform 2)
      E46-24 (RLSB)*1 - Body ground Y - Body ground Rear seat belt buckle switch LH signal Ignition switch ON, rear seat belt buckle switch LH unfastened Below 1 V
      Ignition switch ON, rear seat belt buckle switch LH fastened 11 to 14 V
      E46-25 (RCSB)*1 - Body ground L - Body ground Rear seat belt buckle switch center signal Ignition switch ON, rear seat belt buckle switch center unfastened Below 1 V
      Ignition switch ON, rear seat belt buckle switch center fastened 11 to 14 V
      E46-26 (RRSB)*1 - Body ground R - Body ground Rear seat belt buckle switch RH signal Ignition switch ON, rear seat belt buckle switch RH unfastened Below 1 V
      Ignition switch ON, rear seat belt buckle switch RH fastened 11 to 14 V
      E46-27 (OILW)*2 - Body ground SB - Body ground Oil level signal Ignition switch ON, oil level not low 11 to 14 V
      Ignition switch ON, oil level low Below 1 V
      E46-28 (SW1)*6 - Body ground B - Body ground Steering pad switch assembly (DISP switch) signal Ignition switch ON, DISP switch not pressed 4 to 5 V
      Ignition switch ON, DISP switch pressed Below 1 V
      E46-29 (TWS2)*7 - Body ground P - Body ground Temperature switch signal Ignition switch ON, water temperature hot warning light off 4.9 to 5.1 V
      Ignition switch ON, water temperature hot warning light on Below 1 V
      E46-31 (CANL) - Body ground W - Body ground CAN communication line - -
      E46-32 (CANH) - Body ground LG - Body ground CAN communication line - -
      E46-35 (TX1+) - E46-34 (TX1-) G - W Ambient temperature sensor signal Ignition switch ON 4.4 to 5.6 V
      E46-39 (IG+) - Body ground P - Body ground Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      E46-40 (B) - Body ground W - Body ground Battery Always 11 to 14 V
      E45-1 (B) - Body ground B - Body ground Battery Always 11 to 14 V
      E45-3 (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
      E45-7 (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 blinks 11 to 14 V ←→ Below 1 V
      E45-9 (ER) - Body ground P - Body ground RH turn indicator light signal (Input) Ignition switch ON, RH turn signal switch off 11 to 14 V
      Ignition switch ON, RH turn signal switch on Below 1 V
      E45-10 (EL) - Body ground LG - Body ground LH turn indicator light signal (Input) Ignition switch ON, LH turn signal switch off 11 to 14 V
      Ignition switch ON, LH turn signal switch on Below 1 V
      E45-11 (S) - Body ground R - 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
      E45-12 (FOG)*8 - Body ground G - 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
      E45-13 (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 blinks 11 to 14 V ←→ Below 1 V

      • *1: w/ Rear seat belt warning

      • *2: for Diesel

      • *3: for Gasoline

      • *4: w/o Generator control ECU assembly

      • *5: for Multi-mode manual transaxle

      • *6: w/ Steering pad switch

      • *7: w/ Exhaust heat recirculation system

      • *8: w/ Front fog light


      1. A012MZ4N01

        Waveform 1 (Reference):

        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Ignition switch ON, 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.

      2. A012GUXE01

        Waveform 2 (Reference):

        Item Condition
        Tool setting 2 V/DIV., 500 μs/DIV.
        Vehicle condition Ignition switch ON