ECU Wiring

Pins 6 and 14 are the only 2 that are different between the 1990 wiring and 1991-1994 wiring schematics.

Pin	1990	Wire Color	1991-1994	Wire Color

1	Self-Diagnosis Output	yel	Self-Diagnosis Output	yel
2	Diagnosis/Data transfer select terminal	wht	Diagnosis/Data transfer select terminal	wht
3	Turbo meter (pressure guage)	blk-red	Turbo meter (pressure guage)	blk-red
4	Oxygen Sensor	wht	Oxygen Sensor	wht
5	Power steering oil pressure switch	yel-blk	Power steering oil pressure switch	yel-blk
6	Idle position switch	grn	Air flow sensor active filter reset	grn-wht
7	Air conditioner switch	blk-grn	Air conditioner switch	blk-grn
8	Intake air temperature sensor	grn-org	Intake air temperature sensor	grn-org
9	Detonation sensor	wht	Detonation sensor	wht
10	Air flow Sensor	grn-blu	Air flow Sensor	grn-blu
11	Empty		Empty (ABS Control if equipped)
12	Ignition timing adjustment connector	yel-red	Ignition timing adjustment connector	yel-red
13	power	blk-wht	Control relay (Fuel pump drive signal)	blk-wht
14	airflow sensor	grn-wht	Idle Switch	grn
15	EGR temperature sensor (CA Only)	blu-yel	EGR temperature sensor (CA Only)	blu-yel
16	Barometric pressure sensor	grn-yel	Barometric pressure sensor	grn-yel
17	Sensors ground	grn-blk	Sensors ground	grn-blk
18	Vehicle speed sensor	yel-wht	Vehicle speed sensor	yel-wht
19	Throttle position sensor	grn-wht	Throttle position sensor	grn-wht
20	Coolant temperature sensor	yel-grn	Coolant temperature sensor	yel-grn
21	Crank angle sensor (RPM)	blk	Crank angle sensor (RPM)	blk
22	Top dead center sensor	wht	Top dead center sensor	wht
23	Power supply for sensors (5volts)	grn-red	Power supply for sensors (5volts)	grn-red
24	Sensors ground	grn-blk	Sensors ground	grn-blk
51	No. 1 Injector	yel-blu	No. 1 Injector	yel-blu
52	No. 2 Injector	yel-blk	No. 2 Injector	yel-blk
53	EGR Control Solenoid Valve (CA only)	blk-yel	EGR Control Solenoid Valve (CA only)	blk-yel
54	Power transistor for #1 and #4	yel	Power transistor for #1 and #4	yel
55	Power transistor for #2 and #3	yel-red	Power transistor for #2 and #3	yel-red
56	Control relay (Fuel pump control)	wht-red	Control relay (Fuel pump control)	wht-red
57	Fuel pressure control valve	wht	Fuel pressure control valve	wht
58	Coil "A1" for idle speed control servo	blu	Coil "A1" for idle speed control servo	blu
59	Coil "A2" for idle speed control	yel	Coil "A2" for idle speed control	yel
60	No. 3 Injector	lt grn	No. 3 Injector	lt grn
61	No. 4 Injector	lt grn-wht	No. 4 Injector	lt grn-wht
62	Purge control solenoid valve	blk-wht	Purge control solenoid valve	blk-wht
63	MPI Control relay	blk-blu	MPI Control relay	blk-blu
64	Engine warning light	red-grn	Engine warning light	red-grn
65	Air conditioner relay	red-blk	Air conditioner relay	red-blk
66	MPI Control relay	blk-blu	MPI Control relay	blk-blu
67	Coil "B1" for idle speed control servo	wht	Coil "B1" for idle speed control servo	wht
68	Coil "B2" for idle speed control servo	blk	Coil "B2" for idle speed control servo	blk
101	Ground	blk	Ground	blk
102	Power supply	red	Power supply	red
103	Power supply for backup	red-blk	Power supply for backup	red-blk
104	Ground	blk	Ground	blk
105	Waste gate solenoid valve	org	Waste gate solenoid valve	org
106	Ground	blk	Ground	blk
107	Power supply	red	Power supply	red
108	"ST" terminal for ignition switch	blk-yel	"ST" terminal for ignition switch	blk-yel
109	Ignition pulse detect-Fuel Pump Control	wht	Ignition pulse detect-Fuel Pump Control	wht
110	MPI Control Relay	blk-wht	"1G" terminal for Ignition switch	blk-wht