Stock '85 MR2
Body Harness (Male) Side |
Engine Harness (Female) Side |
|||
1 |
-- |
NC | -- |
NC |
2 |
Y/Blk |
Oil Pressure to Driver's seat connector | Y/Blk |
Oil Pressure Sensor |
3 |
-- |
NC | -- |
NC |
4 |
Injector Resistor Pack | Blk |
Injectors #3 & 4 | |
5 |
Injector Resistor Pack | R |
Injectors #1 & 2 | |
6 |
Y/G |
Water Temp Gauge to Driver's seat connector | Y/G |
Water Temp Sensor |
7 |
Blk |
+B EFI Relay | Blk |
Circuit Opening Relay |
8 |
Blk/Y |
10A Engine Fuse | Blk/Y |
Alternator |
9 |
-- |
NC | -- |
NC |
10 |
Purp/W |
Speed Sensor to Driver's seat connector | Purp/W |
ECU Speed Sensor input |
11 |
R/Blk |
L&R Reverse Lights & Reverse Switch | -- |
NC |
12 |
Blk/R |
Power from Ignition Main Relay | Blk/R |
Ignitor/Coil |
13 |
W/R |
AM2 | W/R |
ECU |
14 |
-- |
NC | -- |
NC |
15 |
Blk |
IG- to Tachometer to Driver's seat connector | Blk |
IG- from Ignitor/Coil & Diagnosis |
16 |
-- |
NC | -- |
NC |
17 |
Y |
5A Charge 'L' Signal from Alternator | Y |
'L' Signal from Alternator |
18 |
Blu |
Fuel Pump | Blu |
Circuit Opening Relay |
19 |
-- |
NC | -- |
NC |
20 |
Blk/G |
Engine Bay Fan Relay | Blk/G |
Engine Bay Fan |
21 |
W/Blk |
L& R Tail Lights |
Br |
Chassis Ground & Circuit Opening Relay |
22 |
Blk |
ISC input from brake switch | Blk |
ECU ISC input |
| Deleted | |
| Moved |
Body Harness (Male) Side |
Engine Harness (Female) Side |
|||
1 |
G/W |
Check Engine Light to Dash | R/Y |
Check Engine Light from ECU |
2 |
Y/Blk |
Oil Pressure to Driver's seat connector | W |
Oil Pressure Sensor |
3 |
R/W |
Batt from EFI Fuse | R/W |
Batt to ECU |
4 |
Cooling Fan Relay switch side | W/Blu |
ELS1 to ECU | |
5 |
Blk |
Starter Relay | Blk |
Terminal 50 on Starter |
6 |
Y/G |
Water Temp Gauge to Driver's seat connector | Y/G |
Water Temp Sensor |
7 |
Blk |
+B EFI Relay | Blk |
+B COR, ECU, O2 Sensor, etc |
8 |
Blk/Y |
10A Engine Fuse | R/Blu |
Alternator IG signal |
9 |
Blower Relay | Blu |
ELS2 to ECU | |
10 |
Purp/W |
Speed Sensor to Driver's seat connector | Purp/W |
ECU Speed Sensor input |
11 |
R/Blk |
L&R Reverse Lights | R/Blk |
Reverse Switch on Tranny |
12 |
Blk/R |
Power from Ignition Main Relay | Blk/W |
Ignitor/Coil & Injectors |
13 |
Cooling Fan Relay coil side | LG/Blk |
CF from ECU | |
14 |
G |
Taillight Relay | G |
ELS3 to ECU |
15 |
Blk |
IG- to Tachometer to Driver's seat connector | Blk |
IG- from Ignitor/Coil & Diagnosis |
16 |
W |
Alt 'S' 5A fuse (added to fuse/relay box) | W |
Alt 'S' Signal |
17 |
Y |
5A Charge 'L' Signal from Alternator | Y |
'L' Signal from Alternator |
18 |
Blu |
Fuel Pump | Blu/Blk |
Circuit Opening Relay & Diagnosis |
19 |
Blk |
Defog Switch | Blk |
ELS4 to ECU |
20 |
Blk/G |
Engine Bay Fan |
Blk/G |
Engine Bay Fan |
21 |
Blu/W |
Engine Bay Fan |
Blu/W |
Engine Bay Fan |
22 |
Blu/Blk |
Engine Bay Fan | Blu/Blk |
Engine Bay Fan |
| Optional. Ignore if wiring fan to come on with ignition |
Blue = Body Harness side
Red = Engine Harness side
* = there's 2 ways to do this. I wired the engine bay fan to be on whenever the ignition is on. If you would like to keep the original wiring with the cooling fan computer and the temp sensor, just use the 2 empty spaces for the other 2 wires (Blk/G & Blu/W) in the circuit.
Black = Body Harness side (don't forget the Fp signal coming off the COR)
Red = Engine Harness side
Note the optional Alternator Sensing (Alt-S) fuse. You could just tie this to the B signal if you'd like.
Also above is how I wired the engine bay fan. If you would like to use the stock MR2 setup with the temp sensor and computer you need to wire it up like the stock MR2 diagram. It's fairly straightforward.