this is what i did for repinning on a 02/03 sti wiring harness to an unmodified JDM STI GC8 wiring harness.
connections to the waste gate solinoid, manifold pressure solinoid, differential pressure sensor and air flow meter remain unchanged.
my replacement
ecu is the motec, this is untested on a factory
ecu.
i have not included the reference for the cam/crank sensors, as they share the identicle same colours and should be traced/repinned manually to avoid confusion.
For the Brown plug (B21)
| Pin | GD Wire | GC Wire | Note |
|---|
| 1 | - | GR | |
| 2 | RY | YR | |
| 3 | GY | WL | |
| 4 | R | YL | |
| 5 | - | - | |
| 6 | - | - | |
| 7 | WY+W | LgW | Coils |
| 8 | LY+LgY | YL | Coils |
| 9 | YW | LB | |
| 10 | W | LR | |
| 11 | LW | Lg | |
| 12 | GW | Br | |
| 13 | BR+BR | GW | |
| 14 | BL | BW | |
| 15 | BY | B | |
| 16 | BL | BY | |
For the black plug or grey if GC8 (B20)
| Pin | GD Wire | GC Wire | Note |
|---|
| 1 | G | WB | |
| 2 | - | BR | |
| 3 | W | LW | |
| 4 | - | LB | |
| 5 | - | - | |
| 6 | RY | OrB | |
| 7 | - | - | |
| 8 | OrW | WR | |
| 9 | BG | LightBlue | |
| 10 | YG | Lg | |
| 11 | WG | WL | |
| 12 | R | RL | |
| 13 | - | - | |
| 14 | - | - | |
| 15 | - | - | |
| 16 | Gr | BY | |
| 17 | - | - | |
| 18 | - | - | |
| 19 | - | - | |
| 20 | - | - | |
This will leave over the four avcs wires GB+WB+LB+YB for the AVCS Solinoids
These are not necessary for GC8.