| Connector | Pin Count | Color Code (Typical) | |-----------|-----------|----------------------| | A | 32 | Gray | | B | 32 | Black | | C (OBD) | 22 | Blue (some models) |

Note: Not all pins are populated on all vehicle models (e.g., Wagon R, Alto, Jimny, Carry).

Imagine looking at the harness plug as it plugs into the ECU.

Rows:

Columns: 1 through 16 (Left to Right)

If replacing with aftermarket ECUs (Link, Haltech, MaxxECU, Speeduino):

| OEM Feature | Aftermarket Recommendation | |-------------|-----------------------------| | 24-2 crank trigger | Use “Mitsubishi 6G72” or “36-2” mode with divider | | Cam sensor (single pulse) | Set as “sync pulse every 720°” | | IAC (4-wire stepper) | Use stepper motor driver (standard) | | Ignition outputs (2 channels) | Wasted spark: coil A = cyl 1+4, coil B = cyl 2+3 | | Fuel pump control | Use B22 to trigger external relay |

The K6A turbo is very sensitive to crank trigger noise. Use twisted pair wires for CKP and CMP.