METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A01MFR9E01

    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
      G13-1 (MSM+) - Body ground Y - Body ground Steering pad switch assembly signal Power switch on (IG), enter, top and back switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Power switch on (IG), enter, top or back switches on steering pad switch assembly pushed Below 1 V
      G13-2 (MSTI) - Body ground SB - Body ground Steering pad switch assembly signal Power switch on (IG), up, down, right, and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Power switch on (IG), up, down, right, or left switches on steering pad switch assembly pushed Below 1 V
      G13-4 (FCSI) - Body ground B - Body ground FC water release switch signal Power switch on (IG), FC water release switch not pushed Below 1 V
      Power switch on (IG), FC water release switch pushed 11 to 14 V
      G13-19 (+S) - Body ground L - Body ground Speed signal for other system (Output) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      G13-20 (SI) - Body ground R - Body ground Speed signal for other system (Input) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      G13-21 (IG+) - Body ground BE - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      G13-22 (B) - Body ground GR - Body ground Battery Power switch off 11 to 14 V
      G13-24 (TR) - Body ground B - Body ground Light control rheostat signal Power switch on (IG), up switch and down switch of light control rheostat not pushed 4.6 to 5.3 V
      Power switch on (IG), up switch of light control rheostat pushed Below 1 V
      G13-25 (TC) - Body ground V - Body ground Light control rheostat signal Power switch on (IG), up switch and down switch of light control rheostat not pushed 4.6 to 5.3 V
      Power switch on (IG), up switch and down switch of light control rheostat pushed Below 1 V
      G13-26 (CANH) - Body ground B - Body ground CAN communication line - -
      G13-27 (CANL) - Body ground W - Body ground CAN communication line - -
      G13-28 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω
      G13-6 (INT) - Body ground B - Body ground Tire pressure warning reset switch Power switch on (IG), tire pressure warning reset switch off 8 to 15 V
      Power switch on (IG), tire pressure warning reset switch on Below 1 V
      G13-39 (ILL-) - Body ground W - Body ground Illumination signal Power switch on (IG), headlight dimmer switch off 11 to 14 V
      Power switch on (IG), headlight dimmer switch in tail or head position Below 1 V
      G13-40 (EP) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G14-1 (B) - Body ground P - Body ground Battery Power switch off 11 to 14 V
      G14-10 (HAZ) - Body ground R - Body ground Hazard warning switch signal (Input) Power switch on (IG), hazard warning switch not pressed 11 to 14 V
      Power switch on (IG), hazard warning switch pressed Below 1 V
      G14-5 (ER) - Body ground G - 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
      G14-11 (EL) - Body ground SB - 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
      G14-7 (TRNR) - Body ground GR - 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
      G14-6 (LR) - Body ground L - 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
      G14-2 (LP) - Body ground G - Body ground Security indicator light signal Security indicator light off Below 1 V
      Security indicator light blinking 11 to 14 V ←→ Below 1 V
      G14-9 (SW) - Body ground V - Body ground Headlight dimmer switch assembly (full turn) signal Headlight dimmer switch assembly on (full turn) 11 to 14 V
      Headlight dimmer switch assembly off Below 1 V
      G13-34 (MSCL) - Body ground SB - Body ground CAN communication line - -
      G13-33 (MSCH) - Body ground GR - Body ground CAN communication line - -
      G14-13 (TRNL) - Body ground Y - 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
      G14-12 (LL) - Body ground B - 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
      G14-3 (PAON) - Body ground R - Body ground Passenger airbag ON indicator light signal Power switch on (IG), occupant detection sensor on 11 to 14 V
      G14-4 (P-AB) - Body ground B - Body ground Passenger airbag OFF indicatorlight signal Power switch on (IG), occupant detection sensor off Below 1 V

      1. A01MHPKN02

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester Connection

        • G13-19 (+S) - Body ground

        • G13-20 (SI) - 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.