Suzuki K6a Engine Ecu Pinout ✓

| Part Number | Vehicle | Turbo | |-------------|----------------|-------| | 33920-78G00 | Alto HA25S | No | | 33920-78G10 | Alto HA25S | Yes | | 33920-78G30 | Wagon R MC22S | Yes | | 33920-78G50 | Jimny JB23 | Yes (late) |

Need a specific wiring diagram or troubleshooting steps? Reply with your exact ECU number and vehicle model.

The Suzuki K6A engine is a marvel of Japanese kei-car engineering. This 658 cc, 3-cylinder, 4-valve per cylinder turbocharged (and sometimes naturally aspirated) powerhouse found its way into legends like the Alto Works, Wagon R, Kei, Cappuccino, and the Mighty Boy (retrofit). However, as these vehicles age—and as enthusiasts push for standalone engine management or perform complex swaps—understanding the Engine Control Unit (ECU) pinout becomes critical. suzuki k6a engine ecu pinout

If you are staring at a spaghetti mess of wires, a dead ECU, or planning a piggyback tune, this guide will walk you through the anatomy of the K6A ECU pinout, connector types, sensor signals, and common troubleshooting pitfalls.

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. | Part Number | Vehicle | Turbo |

When wiring a standalone:

This connector handles the main power relay and communication. Need a specific wiring diagram or troubleshooting steps

| Pin No. | Wire Color (Typ) | Function | Description | | :--- | :--- | :--- | :--- | | A1 | Black/White | Main Relay Power | Battery Voltage (12V+) when Ignition is ON. | | A2 | Black | ECU Ground | Chassis Ground / Sensor Ground. | | A3 | Black/Yellow | Ignition Switch Power | 12V+ from Ignition switch (Start/Run). | | A6 | - | Check Engine Light (MIL) | Grounds the bulb to illuminate the dash light. | | A10 | - | Diagnostic (K-Line) | Connects to OBD1 Diagnostic Connector. | | A15 | - | Fuel Pump Relay | Grounds the fuel pump relay to activate the pump. | | A21 | - | A/C Signal | Input from A/C amplifier (requests idle-up). |