Suzuki K6a Engine Ecu Pinout ★ Best & Legit

Because the factory K6A ECUs are becoming rare and are notoriously difficult to tune for high horsepower, many owners switch to standalone ECUs like the Megasquirt/Speeduino or Link G4X.

When wiring a standalone:

| Pin | Wire Color | Function | Notes | | :--- | :--- | :--- | :--- | | B1 | Green/Red | TPS (Throttle Position) Signal | 0.5V (closed) to 4.5V (WOT) | | B2 | Red | TPS Sensor 5V Reference | +5V regulated | | B3 | Green/Black | MAP Sensor (Manifold Absolute Pressure) | Frequency based or 0-5V | | B4 | Black/Blue | MAP/BARO Sensor Ground | 0V | | B6 | White/Red | IAT (Intake Air Temp) | Resistance (2k Ohm cold) | | B7 | Black/Red | ECT (Engine Coolant Temp) | Resistance (200-300 Ohm hot) | | B10 | Yellow/Red | Camshaft Position Sensor (CMP) | Hall effect (0-5V square) | | B11 | Blue/White | Cam Sensor Power | 12V or 5V depending on year | | B15 | Green/Yellow | IACV (Idle Air Control Valve) - Coil 1 | Stepper motor / PWM | | B16 | Green/Blue | IACV - Coil 2 | Stepper motor / PWM | | B17 | Green/Black | IACV - Coil 3 | Stepper motor / PWM | | B18 | Green/Orange | IACV - Coil 4 | Stepper motor / PWM | | B22 | Pink/Black | O2 Sensor (Lambda) Signal | 0.1V (lean) to 0.9V (rich) | | B25 | Orange | Vehicle Speed Sensor (VSS) | 5V pulse frequency | | B30 | Light Green/Red | Check Engine Light (MIL) | Ground output to illuminate | | B31 | Blue | Diagnostic Switch (DLC Pin for code read) | Ground to enter diagnostic mode | | B35 | Purple | Starter Signal (SW) | 12V while cranking | suzuki k6a engine ecu pinout

Disclaimer: Wire colors vary by chassis (Alto vs Wagon R). Always back-probe to verify before cutting. Because the factory K6A ECUs are becoming rare

The K6A ECU is sensitive. Here are the non-negotiable voltages: Disclaimer: Wire colors vary by chassis (Alto vs Wagon R)

After any wiring modification, perform this continuity test (key OFF, ECU unplugged):