METER / GAUGE SYSTEM TERMINALS OF ECU

COMBINATION METER ASSEMBLY

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
   G3-1 (EP) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
   G3-3 (ILL-) - Body ground	GR - Body ground	Illumination signal	Engine switch on (IG), light control switch off	11 to 14 V
   			Engine switch on (IG), light control switch in tail or head position	Below 1 V
   G3-6 (RHUP) - Body ground	B - Body ground	Light control rheostat signal (Light control rheostat up switch)	Engine switch on (IG), up switch pressed	Below 1 V
   			Engine switch on (IG), up switch not pressed	11 to 14 V
   G3-7 (RHDW) - Body ground	P - Body ground	Light control rheostat signal (Light control rheostat down switch)	Engine switch on (IG), down switch pressed	Below 1 V
   			Engine switch on (IG), down switch not pressed	11 to 14 V
   G3-8 (TIRE) - Body ground	Y - Body ground	Tire pressure warning light signal	Engine switch on (IG), tire pressure warning light off	3.2 V or higher
   			Engine switch on (IG), tire pressure warning light blinks	Below 3.2 V
   G3-9 (L) - Body ground	B - Body ground	Fuel sender gauge signal	Fuel F (full tank) → E (empty)	Below 1 V → 4.5 to 9 V
   G3-11 (RSET) - Body ground	P - Body ground	ODO/TRIP switch signal	Engine switch on (IG), ODO/TRIP switch on (Pushed)	Below 1 Ω
   			Engine switch on (IG), ODO/TRIP switch off (Not pushed)	1 MΩ or higher
   G3-12 (P/SB) - Body ground	L - Body ground	Front passenger seat belt signal	Engine switch on (IG), passenger seat occupied, Seat belt fastened	11 to 14 V
   			Engine switch on (IG), passenger seat occupied, seat belt unfastened	Below 1 V ←→ 11 to 14 V
   G3-15 (OIL) - Body ground	G - Body ground	Engine oil level sensor signal	Engine switch on (IG), engine oil level warning display off	11 to 14 V
   			Engine switch on (IG), engine oil level warning display on	Below 1 V
   G3-19 (B) - Body ground	Y - Body ground	Turn signal LH	Engine switch on (IG), turn signal switch neutral position	Below 1 V
   			Engine switch on (IG), turn LH indicator light blinks	Below 1 V ←→ 11 to 14 V
   G3-20 (B) - Body ground	G - Body ground	Turn signal RH	Engine switch on (IG), turn signal switch neutral position	Below 1 V
   			Engine switch on (IG), turn RH indicator light blinks	Below 1 V ←→ 11 to 14 V
   G3-21 (E2) - Body ground	BR - Body ground	Signal ground	Always	Below 1 V
   G3-23 (E) - Body ground	W - Body ground	Fuel sender gauge ground	Always	Below 1 Ω
   G3-25 (B) - Body ground	L - Body ground	Battery	Always	11 to 14 V
   G3-27 (IG+) - Body ground	R - Body ground	Engine switch signal	Engine switch off	Below 1 V
   			Engine switch on (IG)	11 to 14 V
   G3-29 (S) - Body ground	V - Body ground	Oil pressure switch signal	Engine switch on (IG), oil pressure warning display off	11 to 14 V
   			Engine switch on (IG), oil pressure warning display on	Below 1 V
   G3-30 (CHG-) - Body ground	P - Body ground	Charge warning light signal	Engine switch on (IG), charge warning light off	11 to 14 V
   			Engine switch on (IG), charge warning light on	Below 1 V
   G3-31 (CHK) - Body ground	V - Body ground	MIL (Malfunction Indicator Lamp) signal	Engine switch on (IG), MIL (Malfunction Indicator Lamp) off	11 to 14 V
   			Engine switch on (IG), MIL (Malfunction Indicator Lamp) on	Below 1 V
   G3-32 (+S) - Body ground	R - Body ground	Speed signal for other systems (Output)	Engine switch on (IG), front wheel turned slowly	Pulse generation (See waveform 1)
   G3-33 (SI) - Body ground	V - Body ground	Speed signal for other systems (Input)	Engine switch on (IG), front wheel turned slowly	Pulse generation (See waveform 1)
   G3-34 (WLVL) - Body ground	W - Body ground	Washer level warning switch signal	Engine switch on (IG), washer level warning display off	11 to 14 V
   			Engine switch on (IG), washer level warning display comes on	Below 1 V
   G3-37 (LIN) - Body ground	GR - Body ground	LIN communication signal	Engine switch on (IG)	Pulse generation
   G3-39 (CANL) - Body ground	W - Body ground	CAN communication signal	Engine switch off	200 Ω or higher
   G3-40 (CANH) - Body ground	LG - Body ground	CAN communication signal	Engine switch off	200 Ω or higher

2. 

   Using an oscilloscope, check waveform 1.

   Table 1. Waveform 1 (Reference)

   Item	Condition
   Tool setting	5 V/DIV., 20 ms./DIV.
   Vehicle condition	Driving at approximately 20 km/h (12 mph)

   Tip:

   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.