1986 1G-EU ECU pinout
1986 1G-EU engine control ECU connector layout with Q, R and S plugs. Terminal functions and visible wire colours have been entered as a starter pinout. Blank or unclear positions remain editable.
First letter = basic wire color. Second code = stripe color. Example: L-Y means blue wire with yellow stripe.
Source ECU / loom
Compact overview only. Blank gaps are real connector spaces. Click a connector to show the larger detailed view below. Use the view-side button to mirror the connectors between ECU side and connector/loom side.
Connector face view as shown in the diagram. Top row uses 1,2,3,4, blank,6, blank. Bottom row uses 8,9,10,11,12, blank,14.
Connector face view as shown in the diagram. Top row 1-9. Bottom row 10-13, blank,15-17, blank.
Connector face view as shown in the diagram. Top row 1-5. Bottom row 6-10.
Source connectors one by one
Connector face view as shown in the diagram. Top row uses 1,2,3,4, blank,6, blank. Bottom row uses 8,9,10,11,12, blank,14.
Pin list for Q — Q connector - white, 14-number shell
Labels, signal names and notes for the selected connector.
| Pin | Label / signal | I/O | Function / description | Wire / req. | Links |
|---|---|---|---|---|---|
|
#1
cell 1,1
|
+B1 | power |
EFI main relay power EFI main relay power |
B-RBlack with Red stripe | — |
|
#2
cell 1,2
|
BATT | power |
Battery constant power Battery constant power |
B-YBlack with Yellow stripe | — |
|
#3
cell 1,3
|
CCO | output |
Air conditioning / idle-up control Air conditioning / idle-up control |
G-BGreen with Black stripe | — |
|
#4
cell 1,4
|
FC | output |
Fuel pump control Fuel pump control |
GGreen | — |
|
•
cell 1,5
|
Empty / unused | — | — |
— |
— |
|
#6
cell 1,6
|
FPU | output |
Fuel pressure up VSV Fuel pressure up VSV |
R-LRed with Blue stripe | — |
|
•
cell 1,7
|
Empty / unused | — | — |
— |
— |
|
#8
cell 2,1
|
OX | input |
Oxygen sensor Oxygen sensor |
HH | — |
|
#9
cell 2,2
|
ISC | output |
Idle speed control Idle speed control |
H-YH with Yellow stripe | — |
|
#10
cell 2,3
|
E2 | ground |
Sensor ground Sensor ground |
BRBrown | — |
|
#11
cell 2,4
|
VC | input |
Sensor reference voltage Sensor reference voltage |
L-RBlue with Red stripe | — |
|
#12
cell 2,5
|
VC | input |
Sensor reference voltage Sensor reference voltage |
L-RBlue with Red stripe | — |
|
•
cell 2,6
|
Empty / unused | — | — |
— |
— |
|
•
cell 2,7
|
Empty / unused | — | — |
— |
— |
Connector face view as shown in the diagram. Top row 1-9. Bottom row 10-13, blank,15-17, blank.
Pin list for R — R connector - yellow, 17-number shell
Labels, signal names and notes for the selected connector.
| Pin | Label / signal | I/O | Function / description | Wire / req. | Links |
|---|---|---|---|---|---|
|
#1
cell 1,1
|
THW | input |
Water temperature sensor Water temperature sensor |
GGreen | — |
|
#2
cell 1,2
|
PIM | input |
Vacuum sensor signal Vacuum sensor signal |
Y-RYellow with Red stripe | — |
|
#3
cell 1,3
|
THA | input |
Air temperature sensor Air temperature sensor |
LGLight Green | — |
|
#4
cell 1,4
|
T | input |
Check connector test terminal Check connector test terminal |
R-GRed with Green stripe | — |
|
#5
cell 1,5
|
IGF | input |
Igniter feedback Igniter feedback |
R-BRed with Black stripe | — |
|
#6
cell 1,6
|
G1 | input |
Distributor signal G1 Distributor signal G1 |
RRed | — |
|
#7
cell 1,7
|
G | ground |
Distributor G signal Distributor G signal |
BBlack | — |
|
#8
cell 1,8
|
IGT | output |
Igniter trigger Igniter trigger |
RRed | — |
|
#9
cell 1,9
|
STP | output |
Stop lamp switch Stop lamp switch |
GR-GGray with Green stripe | — |
|
#10
cell 2,1
|
E2 | ground |
Sensor ground Sensor ground |
BRBrown | — |
|
#11
cell 2,2
|
VTA | input |
Throttle position sensor signal Throttle position sensor signal |
H-RH with Red stripe | — |
|
#12
cell 2,3
|
VC | input |
Sensor reference voltage Sensor reference voltage |
L-RBlue with Red stripe | — |
|
#13
cell 2,4
|
IDL | input |
Throttle position sensor idle switch Throttle position sensor idle switch |
Y-LYellow with Blue stripe | — |
|
#15
cell 2,6
|
NE | input |
Distributor NE signal Distributor NE signal |
HH | — |
|
#16
cell 2,7
|
E21 | ground |
Sensor ground Sensor ground |
BRBrown | — |
|
#17
cell 2,8
|
VF | input |
Check connector VF signal Check connector VF signal |
GRGray | — |
Connector face view as shown in the diagram. Top row 1-5. Bottom row 6-10.
Pin list for S — S connector - yellow, 10-number shell
Labels, signal names and notes for the selected connector.
| Pin | Label / signal | I/O | Function / description | Wire / req. | Links |
|---|---|---|---|---|---|
|
#1
cell 1,1
|
NSW | input |
Neutral start switch Neutral start switch |
B-WBlack with White stripe | — |
|
•
cell 1,2
|
Empty / unused | — | — |
— |
— |
|
#3
cell 1,3
|
STA | input |
Starter switch Starter switch |
B-LBlack with Blue stripe | — |
|
#4
cell 1,4
|
#10 | output |
Injector group, cylinders 1 and 4 Injector group, cylinders 1 and 4 |
YYellow | — |
|
#5
cell 1,5
|
E01 | ground |
Power ground Power ground |
W-BWhite with Black stripe | — |
|
#6
cell 2,1
|
TSW | input |
Water temperature switch Water temperature switch |
Y-BYellow with Black stripe | — |
|
#7
cell 2,2
|
E1 | ground |
Computer ground Computer ground |
BRBrown | — |
|
•
cell 2,3
|
Empty / unused | — | — |
— |
— |
|
#9
cell 2,4
|
#20 | output |
Injector group, cylinders 2 and 6 Injector group, cylinders 2 and 6 |
LBlue | — |
|
#10
cell 2,5
|
E02 | ground |
Power ground Power ground |
W-BWhite with Black stripe | — |