Finding a high-quality pinout for the Suzuki K6A engine ECU is crucial for successful engine swaps or troubleshooting sensors in popular Kei cars like the Alto, Wagon R, and Jimny. Because this engine was produced for over two decades, the wiring varies significantly between early distributor models, later coil-on-plug versions, and turbocharged variants. Key Resources for High-Quality K6A Pinouts Comprehensive Wiring Databases:
ECUtools.vn : Provides detailed signal pin descriptions for sensors and actuators specifically for the K6A engine.
Scribd ECU Wiring PDF : Contains a 16-pin and 8-pin connector breakdown including color codes for ignition coils, fuel injectors, and oxygen sensors.
Speeduino Wiki : A technical guide for those using aftermarket ECUs, detailing the 6+1 tooth camshaft trigger pattern used by K6A engines.
Common Pin Assignments (Generic K6A):While you must verify your specific ECU part number, many K6A units share these core terminal functions:
Power & Ground: Pin (1) Power Supply; Pin (8) Ground ECM; Pin (14) VCC Power for Sensors. suzuki k6a engine ecu pinout high quality
Engine Sensors: Pin (3) CKP+ (Crank Position); Pin (5) TP (Throttle Position); Pin (24) ECT (Engine Coolant Temp). Outputs: Pin (19) Fuel Pump Relay; Pin (30) Starter Relay. Tips for Finding Your Specific Diagram
Check the ECU Case: High-quality pinouts are often tied to the specific hardware code (e.g., 33920-XXXXX) printed on the label.
Verify the Model Year: Diagrams for a 1990s Alto will differ from a 2013 Suzuki Every.
Community Support: The PakWheels Forums are a major hub for users swapping K6A engines into other vehicles (like the Suzuki Mehran) and often share high-res photos of wiring looms. ECU Wiring Diagram for Suzuki K6A | PDF - Scribd
Before diving into pins, identify the physical unit. Finding a high-quality pinout for the Suzuki K6A
33920-73C00, 33920-70C00, 33920-72C00 (varies by chassis).Note: The pinout below is based on the Suzuki Cappuccino (EA11R) and Autozam AZ-1 specifications, which are the most sought-after K6A variations.
The K6A ECU is typically housed in a metal box behind the glovebox or under the driver’s side dash. It uses two main connectors:
| Connector | Pins | Color | Function | |-----------|------|-------|-----------| | C1 (A) | 32 | Gray | Engine sensors, power grounds | | C2 (B) | 32 (or 24) | Black | Actuators, ignition, fuel, diagnostics |
Total common pins: 64 (32+32) or 56 (32+24) on earlier models.
| Sensor | Signal Pin | Voltage | |--------|------------|---------| | TPS idle | A7 | 0.5–0.7V | | TPS WOT | A7 | 4.2–4.8V | | MAP (engine off) | A4 | 4.0–4.2V (sea level) | | ECT (cold) | A6 | 2.5–3.0V | | IAT (ambient) | A5 | 2.0–2.5V | Note: The pinout below is based on the
Using your high-quality pinout, follow this logical path:
| Symptom | Pin Check | Expected Reading | |---------|-----------|------------------| | No power to ECU | A03, A04 | 12V (key ON) | | No crank signal | C02, C03 (AC voltage) | >1.5V AC while cranking | | No injector pulse | A06 to ground (noid light) | Pulsing light | | No spark | A09, A10 (to igniter) | 5V square wave on oscilloscope |
Do not guess. Guessing burns ECUs.
Document ID: SK6A-ECU-001
Revision: 4.0
Engine: Suzuki K6A (657cc, 3-cylinder, 12-valve DOHC, turbocharged & naturally aspirated variants)
ECU Manufacturer: Denso (typical models: 33920-85Gxx, 33920-78Gxx)
Connector Type: Two 32-pin rectangular connectors (A & B) + one 22-pin connector (C on some variants)
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.