Terminals Of Ecu: Notes

COMBINATION METER ASSY: 

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition Specified	Condition
km/h or mph (C10-1) - Body ground	L - Body ground	km/h or mph signal	Power switch ON (ACC or IG) and km/h or mph switch ON --> OFF	Below 1 V --> 4 to 5.5 V
TRIP EARTH(C10-2) - Body ground	B - Body ground	GND signal FOR ODO/ TRIP SWITCH	Always	Below 1 Ω
ODO/TRIP/RESET (C10-3) - Body ground	R - Body ground	ODO/TRIP/RESET signal	ODO/TRIP/RESET switch ON --> OFF	Below 1 V --> 4 to 5.5 V
IG2 (C10-4) - Body ground	O - Body ground	Power switch signal	Power switch OFF --> ON	10 to 14 V
D-BELT SW (C10-6) - Body ground	LG - Body ground	Driver seat belt condition	D-BELT indicator light ON --> OFF	Below 1 V --> 10 to 14 V
P-BELT SW (C10-7) - Body ground	R - Body ground	Passenger seat belt condition	P-BELT indicator light ON --> OFF	Below 1 V --> 10 to 14 V
SECURITY (C10-8) - Body ground	R - Body ground	SECURITY signal	Key is inserted --> Not inserted	Below 1 V --> 10 to 14 V --> Below 1 V
SPEED IN (C10-9) - Body ground	V - Body ground	Speed signal (Input)	Power switch ON (ACC or IG) and turn the wheel slowly	Pulse generation (See wavefrom 1)
AUTO LVL (C10-10) - Body ground	L - Body ground	Headlight automatic leveling signal	Malfunction in headlight leveling System is normally --> Malfunction	Below 1 V --> 10 to 14 V
AIRBAG (C10-11) - Body ground	B - Body ground	AIRBAG signal	AIRBAG indicator light ON --> OFF	Below 1 V --> 8 to 14 V
TEMP SSR- (C10-12) - Body ground	L - Body ground	Outside temperature signal	Always	Below 1 V --> 4 to 5.5 V
4P OUT (C10-13) - Body ground	V - Body ground	Speed signal (Output)	Power switch ON (ACC or IG) and turn the wheel slowly	Pulse generation (See wavefrom 2)
SIGNAL EARTH (C10-14) - Body ground	BR - Body ground	GND signal	Always	Below 1 Ω
FUEL IN (C10-15) - Body ground	B - Body ground	Fuel signal	Power switch ON (ACC or IG) and fuel level is FULL --> EMPTY	4.0 Ω --> 110 Ω
TURN R (C10-18) - Body ground	G - Body ground	Turn signal right	Turn signal RH indicator light OFF --> ON	Below 1 V --> 10 to 14 V
TURN L (C10-19) - Body ground	Y - Body ground	Turn signal left	Turn signal LH indicator light OFF --> ON	Below 1 V --> 10 to 14 V
TEMP SSR+ (C10-20) - Body ground	R - Body ground	GND	Always	Below 1 Ω
+B (C10-21) - Body ground	Y - Body ground	Power switch signal	Always	10 to 14 V
IG2 (C10-22) - Body ground	V - Body ground	Power switch signal	Power switch OFF --> ON	Below 1 V --> 10 to 14 V
BACK-UP LP (C10-23) - Body ground	P - Body ground	BACK-UP light signal	Power switch ON (ACC or IG) and Shift is except R position --> Shift is R position	Below 1 V --> 10 to 14 V
MPX+ (C10-24) - Body ground	B	Communication signal	Communication circuit	-
MPX- (C10-25) - Body ground	GR	Communication signal	Communication circuit	-
CHECK E/G (C10-26) - Body ground	G - Body ground	CHECK ENGINE signal	Power switch ON (ACC or IG) and CHECK ENGINE warning light ON --> OFF	Below 1 V --> 10 to 14 V
TC (C10-28) - Body ground	SB - Body ground	Tail cancel (light condition) signal	Power switch ON (ACC or IG)	Pulse generation (See wavefrom 3)
TR (C10-29) - Body ground	R - Body ground	Rheostat (light control) signal	Light control dimmer switch is OFF --> TAIL/HEAD	Below 1 V --> 10 to 14 V
P-BELT LP (C10-30) - Body ground	Y - Body ground	Passenger seat belt signal	Power switch ON (ACC or IG) and sit on the passenger seat, seat belt unfastened --> fastened	Below 1 V --> 10 to 14 V
FUEL EARTH (C10-31) - Body ground	BR - Body ground	GND for fuel sender gauge	Always	Below 1 Ω

Waveform 1 (Reference):

Item	Contents
Tool setting	5 V/DIV, 20 ms/DIV
Vehicle condition	Driving at approx. 20 Km/h (12 mph)

Waveform 2 (Reference):

Item	Contents
Tool setting	5 V/DIV, 10 ms/DIV
Vehicle condition	Engine idle speed

Waveform 3 (Reference):

Item	Contents
Tool setting	2 V/DIV, 1 ms/DIV
Vehicle condition	Ignition switch ON

HINT:

Duty ratio changes as illumination becomes darker ("A" becomes longer). 

SUB WIRE HARNESS CONNECTOR: 

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition	Specified Condition
SECURITY (A-1) - Body ground	R - Body ground	SECURITY signal	Key is inserted --> Not inserted	Below 1 V --> 10 to 14 V --> Below 1 V
MPX+ (A-2) - Body ground	B	Communication signal	Communication circuit	-
D-BELT SW (A-3) - Body ground	LG - Body ground	Driver seat belt condition	D-BELT indicator light ON --> OFF	Below 1 V --> 10 to 14 V
SIGNAL EARTH (A-4) - Body ground	BR - Body ground	GND signal	Always	Below 1 Ω
TRIP EARTH (A-5) - Body ground	B - Body ground	GND signal FOR ODO/TRIP SWITCH	Always	Below 1 Ω
km/h or mph (A-6) - Body ground	L - Body ground	km/h or mph signal	Power switch ON (ACC or IG) and km/h or mph switch ON --> OFF	Below 1 V --> 4 to 5.5 V
IG2 (A-7) - Body ground	O - Body ground	Power switch signal	Power switch OFF --> ON	10 to 14 V
ODO/TRIP/RESET (A-8) - Body ground	R - Body ground	ODO/TRIP/RESET signal	ODO/TRIP/RESET switch ON --> OFF	Below 1 V --> 4 to 5.5 V
SPEED IN (A-9) - Body ground	V - Body ground	Speed signal (Input)	Power switch ON (ACC or IG) and turn the wheel slowly	Pulse generation (See waveform 1)
CHECK E/G (A-10) - Body ground	G - Body ground	CHECK ENGINE signal	Power switch ON (ACC or IG) and CHECK ENGINE warning light ON --> OFF	Below 1 V --> 10 to 14 V
TURN L (A-11) - Body ground	Y - Body ground	Turn signal left	Turn signal LH indicator light OFF --> ON	Below 1 V --> 10 to 14 V
TURN R (A-12) - Body ground	G - Body ground Turn signal right	Turn signal RH indicator light OFF --> ON	Below 1 V --> 10 to 14 V
BACK-UP LP (A-13) - Body ground	P - Body ground	BACK-UP light signal	Power switch ON (ACC or IG) and Shift is except R position --> Shift is R position	Below 1 V --> 10 to 14 V
AIRBAG (A-14) - Body ground	B - Body ground	AIRBAG signal	AIRBAG indicator light ON --> OFF	Below 1 V --> 8 to 14 V
TR (B-2) - Body ground	R - Body ground	Rheostat (light control) signal	Light control dimmer switch is OFF --> TAIL/HEAD	Below 1 V --> 10 to 14 V
MPX- (B-3) - Body ground	GR	Communication signal	Communication circuit	-
P-BELT SW (B-4) - Body ground	R - Body ground	Passenger seat belt condition	P-BELT indicator light ON --> OFF	Below 1 V --> 10 to 14 V
AUTO LVL (B-5) - Body ground	L - Body ground Headlight automatic leveling signal	Malfunction in headlight leveling System is normally	Malfunction	Below 1 V --> 10 to 14 V
TEMP SSR+ (B-8) - Body ground	R - Body ground	GND	Always	Below 1 Ω
+B (B-9) - Body ground	Y - Body ground	Power switch signal	Always	10 to 14 V
TEMP SSR- (B-10) - Body ground	L - Body ground	Outside temperature signal	Always	Below 1 V --> 4 to 5.5 V
IG2 (B-11) - Body ground	V - Body ground	Power switch signal	Power switch OFF --> ON	Below 1 V --> 10 to 14 V
FUEL IN (B-12) - Body ground	B - Body ground	Fuel signal	Power switch ON (ACC or IG) and fuel level is FULL --> EMPTY	4.0 Ω --> 110 Ω
FUEL EARTH (B-13) - Body ground	BR - Body ground	GND for fuel sender gauge	Always	Below 1 Ω
4P OUT (B-14) - Body ground	V - Body ground	Tachometer signal (Output)	Power switch ON (ACC or IG) and turn the wheel slowly	Pulse generation (See waveform 2)
TC (B-15) - Body ground	SB - Body ground	Tail cancel (light condition) signal	Power switch ON (ACC or IG)	Pulse generation (See waveform 3)

Waveform 1 (Reference):

Item	Contents
Tool setting	5 V/DIV, 20 ms/DIV
Vehicle condition	Driving at approx. 20 Km/h (12 mph)

Waveform 2 (Reference):

Item	Contents
Tool setting	5 V/DIV, 10 ms/DIV
Vehicle condition	Engine idle speed

Waveform 3 (Reference):

Item	Contents
Tool setting	2 V/DIV, 1 ms/DIV
Vehicle condition	Ignition switch ON

HINT:

Duty ratio changes as illumination becomes darker ("A" becomes longer).