Typically features a 3-plug or 4-plug configuration with higher pin counts.
The Ultimate Suzuki K6A Engine ECU Pinout Guide: High-Quality Wiring Schematic Explained
Do not guess. Guessing burns ECUs.
Finally, after months of tireless work, Alex had compiled a high-quality, detailed document of the Suzuki K6A engine ECU pinout. The map was so precise that it revealed previously unknown connections between the ECU and various engine components.
The ECU relies on a constant stream of data to calculate fuel injection timing and ignition spark advance. Wire these inputs with high-quality shielded cabling wherever possible to prevent interference. Camshaft & Crankshaft Position Sensors (CMP / CKP) suzuki k6a engine ecu pinout high quality
| Pin | Signal Name | I/O | Type | Notes | |-----|---------------------------|------|---------------|--------------------------------| | A1 | Injector #1 | Out | Low-side drive| 12V when off, pulsed ground | | A2 | Injector #2 | Out | Low-side drive| | | A3 | Injector #3 | Out | Low-side drive| | | A4 | Fuel pump relay | Out | Ground switch | On during cranking/running | | A5 | Tachometer output | Out | 0-12V square | 4 pulses per engine revolution | | A6 | MIL (Check Engine Light) | Out | Ground switch | Active low | | A7 | Cooling fan relay 1 | Out | Ground switch | Low speed | | A8 | Cooling fan relay 2 | Out | Ground switch | High speed | | A9 | EGR solenoid (if equipped)| Out | PWM ground | Not on all markets | | A10 | A/C compressor relay | Out | Ground switch | | | A11 | VVT oil control valve | Out | PWM (80-200Hz)| On K6A with VVT (late models) | | A12 | Idle Air Control (IAC) – | Out | PWM stepper | 4-wire stepper motor | | A13 | IAC Coil 2 | Out | | | | A14 | IAC Coil 3 | Out | | | | A15 | IAC Coil 4 | Out | | | | A16 | +12V Battery (constant) | Power| | From EFI main relay | | A17 | Injector common +12V | Power| | From fuel pump relay | | A18 | Ignition coil #1 – trigger| Out | 5V logic | To igniter (if external) | | A19 | Ignition coil #2 – trigger| Out | 5V logic | | | A20 | Ignition coil #3 – trigger| Out | 5V logic | | | A21 | Wastegate solenoid (turbo)| Out | PWM ground | Max 10Hz (boost control) | | A22 | Purge control solenoid | Out | PWM ground | Evaporative emissions | | A23 | Sensor ground | GND | Analog return| 0V reference | | A24 | Power ground 1 | GND | High current | To engine block | | A25 | Power ground 2 | GND | High current | | | A26 | O2 sensor heater (front) | Out | PWM ground | Heated oxygen sensor | | A27 | O2 sensor heater (rear) | Out | PWM ground | If dual sensor | | A28 | MAF sensor +5V reference | Out | +5V | To MAF pin 3 | | A29 | TPS +5V reference | Out | +5V | Throttle position sensor | | A30 | Cam position signal (CMP) | In | Hall effect | 0-5V digital | | A31 | Crank position (CKP) + | In | Magnetic | High resolution | | A32 | Crank position (CKP) – | In | Magnetic | |
Activates the ECU internal relays when the vehicle key is turned to the "ON" position. Typically features a 3-plug or 4-plug configuration with
If your engine cranks but won’t start during a swap, check the FPR pin. Suzuki ECUs ground this pin for roughly 2 seconds when the key turns to "ON" to prime the fuel rail.
Note: Always verify your specific ECU part number (e.g., 33920-XXXXX) printed on the metal casing before pinning out a harness. 📌 High-Quality Suzuki K6A ECU Pinout Reference Finally, after months of tireless work, Alex had
The K6A turbo is . Use twisted pair wires for CKP and CMP.