Terminals Of Ecu

Fig 1: Identifying Combination Meter Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance and voltage according to the value(s) in the table below.
   RESISTANCE AND VOLTAGE REFERENCE CHART
   
   

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   E7-3 (SI) - Body ground	V - Body ground	Speed signal (input)	Engine switch on (IG), wheel turned slowly	Pulse generation
   E7-4 (+S) - Body ground	V - Body ground	Speed signal (output)	Engine switch on (IG), wheel turned slowly	Pulse generation
   E7-5 (WLVL) - Body ground	V - Body ground	Washer level warning signal	Washer fluid level sensor ON	Below 1 V
   			Washer fluid level sensor OFF	11 to 14 V
   E7-6 (OIL) - Body ground	L - Body ground	Oil level signal	Oil level sensor ON	Below 1 V
   			Oil level sensor OFF	11 to 14 V
   E7-11 (R/O) - Body ground	P - Body ground	RSCA OFF indicator light input signal	Engine switch on (IG), RSCA OFF indicator light on	Below 1 V
   			Engine switch on (IG), RSCA OFF indicator light off	8 to 14 V
   E7-12 (CHG-) - Body ground	B - Body ground	CHARGE warning light	Engine switch on (IG), CHARGE warning light on	Below 1 V
   			Engine switch on (IG), CHARGE warning light off	11 to 14 V
   E7-14 (EP) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
   E7-15 (ET) - Body ground	BR - Body ground	Ground	Always	Below 1 V
   E7-17 (B) - Body ground	R - Body ground	Power source	Always	11 to 14 V
   E7-18 (IG+) - Body ground	B - Body ground	Engine switch signal	Engine switch off	Below 1 V
   			Engine switch on (IG)	11 to 14 V
   E7-19 (ILL-) - Body ground	W - Body ground	Light control rheostat signal	Light control rheostat knob fully turned left	Below 1 V
   			Light control rheostat knob fully turned from left to right	Resistance increases when turned to right
   E7-20 (ILL-) - Body ground	W - Body ground	Light control rheostat signal	Light control rheostat knob fully turned left	Below 1 V
   			Light control rheostat knob fully turned from left to right	Resistance increases when turned to right
   E7-22 (WRNP) - Body ground	Y - Body ground	Seat belt condition signal (Passenger side)	Passenger seat belt indicator is off	Below 1 V
   			Passenger seat belt indicator blinks	Alternating between below 1 and 11 to 14 V
   E7-27 (B) - Body ground	R - Body ground	Turn signal R	Engine switch on (IG), turn signal switch neutral position	Below 1 V
   			Engine switch on (IG), turn signal switch turned to left	Alternating between below 1 and 11 to 14 V
   E7-28 (B) - Body ground	L - Body ground	Turn signal L	Engine switch on (IG), turn signal switch neutral position	Below 1 V
   			Engine switch on (IG), turn signal switch turned to right	Alternating between below 1 and 11 to 14 V
   E8-3 (MSSL) - Body ground	L - Body ground	Spiral cable signal	Engine switch on (IG), steering pad switch signal DISP OFF	Below 1 V
   			Engine switch on (IG), steering pad switch signal DISP ON	11 to 14 V
   E8-4 (RSET) - Body ground	B - Body ground	Light control rheostat signal	Engine switch on (IG), light control rheostat trip switch OFF	Below 1 V
   			Engine switch on (IG), light control rheostat trip switch ON	11 to 14 V
   E8-9 (L) - Body ground	Y - Body ground	Fuel sender gauge signal	Always	Below 1 V
   E8-11 (S) - Body ground	L - Body ground	Oil pressure receiver gauge signal	Engine switch on (IG), Oil pressure receiver gauge H	Below 1 V
   			Engine switch on (IG), Oil pressure receiver gauge L	11 to 14 V
   E8-12 (CHK) - Body ground	R - Body ground	MIL input signal	Engine switch on (IG), MIL on	Below 3 V
   			Engine switch on (IG), MIL off	11 to 14 V
   E8-18 (ILL+) - Body ground	G - Body ground	Light control rheostat signal	Engine switch on (IG)	4.6 to 5.4 V
   E8-19 (TR) - Body ground	W - Body ground	Light control rheostat knob input	Light control rheostat knob fully turned left	Below 1 V
   			Light control rheostat knob fully turned right	10 kΩ or higher
   E8-20 (TC) - Body ground	B - Body ground	Light control rheostat signal	Engine switch on (IG), light control rheostat TAIL cancel switch OFF	Below 1 V
   			Engine switch on (IG), light control rheostat TAIL cancel switch ON	10 kΩ or higher
   E8-21 (E) - Body ground	B - Body ground	Fuel sender gauge ground	Always	Below 1 Ω
   E8-23 (E2) - Body ground	L - Body ground	Light control rheostat ground	Always	Below 1 V

   If the result is not as specified, the meter may have a malfunction.

Fig 2: Combination Meter Inner Circuit Diagram (1 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Combination Meter Inner Circuit Diagram (2 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Combination Meter Inner Circuit Diagram (3 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

*1: w/Multi-display

*2: w/o Multi-display

*3: for U.S.A.

*4: except U.S.A.