Terminals Of Ecu

Fig 1: Identifying ECU Terminals

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DIAGNOSTICS & TERMINALS OF ECU REFERENCE

Terminals No. (Symbols)	Wiring Color	Condition	STD Voltage (V)
1 <--> Body Ground (+B <--> Body Ground)	L-W	Constant	10-14 V
2 <--> Body Ground (CHG+ <--> Body Ground)	B-O	Ignition Switch OFF --> ON	Below 1V --> 10 - 14 V
4 <--> Body Ground (ILL+ <--> Body Ground	G	Tail Light Switch OFF --> ON	Below 1V --> 10 - 14 V
6 <--> Body Ground (AIR BAG <--> Body Ground	B-Y	Airbag Warning Light ON --> OFF	Below 1V -> 6 - 11 V
8 <--> Body Ground (ABS <--> Body Ground	W-R	ABS Warning Light ON --> OFF	4-8 V --> Below 1V
9 <--> Body Ground (FBD <--> Body Ground	R	Brake Warning Light ON --> OFF	4-8 V Below 1V
10 <--> Body Ground (OIL P <--> Body Ground)	W	Oil Pressure Warning Light ON --> OFF	Below 1V --> 10 - 14 V
11 <--> Body Ground (CHG- <--> Body Ground)	Y	Discharge indicator light OFF --> ON	Below 1V --> 10 - 14 V
12 <--> Body ground (BRAKE LEVEL SW <--> Body ground)	R-W	Ignition Switch ON And Brake Fluid Level Warning Light ON -> OFF	Below 1V --. 10 - 14 V
13 <--> Body Ground (O/D <--> Body Ground)	LG	O/D Off Indicator Light ON --> OFF	Below 1V --> 10 - 14 V
14 <--> Body Around (CRUISE <--> Body Ground	G-R	Ignition Switch ON And Cruise Indicator Light ON --> OFF	Below 1V --> 10 - 14 V
15 <--> Body Ground (KEY SW <--> Body Ground)	L-B	No Ignition Key Inserted	10-14 V
16 <--> Body Ground (CHK ENG <--> Body Ground	R-Y	Malfunction Indicator Light ON --> OFF	Below 1V --> 10 - 14 V
17 <--> Body Ground (4P OUT <--> Body Ground)	V-W	Ignition Switch ON And Slowly Turn Drive Wheel	Below 1 V <--> 10 - 14 V
18 <--> Body Ground (SP IN <--> Body Ground)	W-G	Ignition Switch ON And Slowly Turn Drive Wheel	Below 1 V <--> 10 - 14 V
19 <--> Body Ground (FUEL- <--> Body Ground)	BR	Constant	Continuity
20 <--> Body Ground (E/G <--> Body Ground)	BR	Constant	Continuity
21 <--> Body Ground (IG+ <--> Body Ground)	R-W	Ignition Switch OFF Or ACC --> ON	Below 1V --> 10 - 14 V
22 <--> Body Ground (BEAM+ <--> Body Ground)	R	Constant	10-14 V
23 <--> Body Ground (TURN R <--> Body Ground)	G-Y	Right Turn Indicator Light OFF --> ON	Below 1V --> 10 - 14 V
24 <--> Body Ground (TURN L <--> Body Ground)	G-B	Left Turn Indicator Light OFF --> ON	Below 1V --> 10 - 14 V
25 <--> Body Ground (EXCEPT D DOOR <--> Body Ground	R	Passenger Door Opened --> Closed	Below 1V --> 10-14 V
26 <--> Body Ground (D DOOR <--> Body Ground)	R-W	Driver Door Opened --> Closed	Below 1V --> 10 - 14 V
27 <--> Body Ground (TACHO <--> Body Ground)	B	Engine Running	Pulse Generation
29 <--> Body Around (FUEL+ <--> Body Ground)	Y	Fuel Level Is Full --> Empty	Below 1V --> 4-7V
30 Body Ground (P-BELT OUT <--> Body Ground)	L	Passenger Seat Belt Warning ON --> OFF	Below 1V --> 10 - 14 V
31 Body Ground (D BELT SW <--> Body Ground)	GY	Ignition Switch ON And Driver Seat Belt Buckle Switch ON (Belt Unfastened)	Below 1 V
31 Body Ground (D BELT SW <--> Body Ground)	GY	Ignition Switch ON And Driver Seat Belt Buckle Switch OFF (Belt Fastened)	10 - 14 V
32 <--> Body Ground (WASHER LEVELS Body Ground	L-W	Washer Level Indicator Light ON --> OFF	Below 1V --> 10 - 14 V
34 <--> Body Ground (BEAM- <--> Body Ground)	W-B	Hi Beam Indicator Light ON --> OFF	Below 1V -> 10 - 14 V
35 <--> Body Ground (ILL- <--> Body Ground)	W-R	Ignition Switch ON And Light Control Rheostat Volume Minimum	No voltage
36 <--> Body Ground (TEMP <--> Body Ground)	Y-R	Ignition Switch ON Pulse Generation ON	Pulse Generation
37 <--> Body Ground (P BELT SW <--> Body Ground)	L-W	Ignition Switch ON And Passenger Seat Belt Buckle Switch ON	Below 1 V
37 <--> Body Ground (P BELT SW <--> Body Ground)	L-W	Ignition Switch ON And Passenger Seat Belt Buckle Switch OFF (Belt Fastened)	10-14 V
38 <--> 39 (OUT SIDE TEMP+ <--> OUT SIDE TEMP-)	B - B-L	Outside Temperature At +25°C (77°F)	1.6 - 1.8kΩ
40 <--> Body Ground (POWER EARTH <--> Body Ground)	W-B	Constant	Continuity