Suzuki K6a Engine Ecu Pinout High Quality May 2026

Mastering the Suzuki K6A Engine: The Ultimate Guide to High-Quality ECU Pinouts

The Suzuki K6A engine is a marvel of Japanese Kei car engineering. This 658cc, three-cylinder, four-valve per cylinder turbocharged (or naturally aspirated) powerplant is the heart of legendary vehicles like the Alto Works, Kei Works, Wagon R, Cappuccino, and Jimny (Sierra variants aside). Despite its small displacement, the K6A is capable of impressive power, but unlocking its full potential—or even performing a basic engine swap or diagnostic—requires one critical document: a high-quality Suzuki K6A engine ECU pinout.

3. Detailed Pinout – Plug B (Sensors)

| Pin | Wire Color | Function | Notes | |-----|------------|----------|-------| | B-1 | G/B (Green/Black) | TPS signal (0.3–4.7V) | 5V sensor reference | | B-2 | Lg/Y (Light Green/Yellow) | MAP sensor signal | 0–5V (vacuum to boost) | | B-3 | Y/B (Yellow/Black) | Intake air temp (IAT) | Thermistor to sensor ground | | B-4 | B/Y (Black/Yellow) | Sensor ground | Same as A-2 | | B-5 | Lg/B (Light Green/Black) | Engine coolant temp (ECT) | Thermistor | | B-6 | R/Y (Red/Yellow) | +5V sensor reference | Output from ECU (do not short to ground) | | B-7 | G (Green) | Crank position sensor (CKP) – signal + | 2-wire variable reluctance | | B-8 | G/W (Green/White) | CKP – signal - | – | | B-9 | W (White) | Cam position sensor (CMP) – signal | Single pulse per cam revolution | | B-10 | B (Black) | CMP ground | – | | B-11 | R/B (Red/Black) | Knock sensor signal (if equipped) | Shielded wire, only on turbo models | | B-12 | B (Black) | Knock sensor shield/ground | – | | B-13 | – | (NC) | – | | B-14 | P/W (Purple/White) | O2 sensor signal (narrowband) | 0–1V, ZrO2 type | | B-15 | B (Black) | O2 sensor ground | Separate from sensor ground | | B-16 | Y/R (Yellow/Red) | VSS (vehicle speed sensor) | Reed switch or Hall effect, 4 pulses/rev | | B-17 | – | (NC or PSPS – power steering pressure) | – | | B-18 | R (Red) | Brake switch signal (to ECU) | For idle-up and decel fuel cut | suzuki k6a engine ecu pinout high quality

The Suzuki K6A is a high-performance 3-cylinder engine commonly found in models like the Carry, Alto, and Jimny. Identifying the correct ECU pinout is critical for engine swaps or installing standalone systems like Common 60-Pin & 34-Pin Coupler Pinout Mastering the Suzuki K6A Engine: The Ultimate Guide

Manufacturer: Denso
Common Part Numbers: 33920-73C00, 33920-70C00, 33920-72C00 (varies by chassis).
Plug Style: One large grey connector with a removable lid/cover.
Pin Count: Typically 64 Pins (4 rows of 16).

Connector A (E01) – 26 Pins – Main Engine Control

| Pin | Wire Color | Function | Signal Type | Notes | |------|------------|----------|-------------|-------| | A01 | Black/White | ECU Ground (Power) | GND | Direct to battery negative. High current. | | A02 | Black/White | ECU Ground (Sensor) | GND | Clean ground for sensors. | | A03 | Red/Black | Battery +12V (Main) | Power | Constant 12V from EFI relay. | | A04 | Red | Battery +12V (Backup) | Power | Always live for memory (clock, trims). | | A05 | Green/Red | Ignition Switch ON | Switched 12V | Activates ECU main relay. | | A06 | Yellow/Black | Injector Cylinder 1 | Output | Sinks to ground. Use test light, not LED. | | A07 | Yellow/Red | Injector Cylinder 2 | Output | Peak/hold type (approx 12V). | | A08 | Yellow/Green | Injector Cylinder 3 | Output | Do not swap or engine runs rough. | | A09 | White | Ignition Output #1 (Power Transistor) | Digital | Controls coils 1 & 2 (lost spark). | | A10 | White/Black | Ignition Output #2 (Power Transistor) | Digital | Controls coil 3 (wasted spark). | | A11 | Blue/White | Fuel Pump Relay Control | Output | Grounds relay when engine cranks/runs. | | A12 | Green/Yellow | Check Engine Light (MIL) | Output | Switched ground to dash light. | | A13 | Brown | EGR Vacuum Solenoid (if equipped) | Output | Not all K6A have EGR. | | A14 | Blue | Boost Control Solenoid (Turbo) | PWM Output | Controls wastegate duty cycle. | | A15 | Empty | N/A | - | Not used in this revision. | | A16 | Black/Yellow | Idle Air Control (IAC) – Close | PWM | Stepper motor wire A. | | A17 | Black/Blue | Idle Air Control (IAC) – Open | PWM | Stepper motor wire B. | | A18 | White/Red | Camshaft Position Sensor (CMP) Signal | Digital (5V) | Hall effect sensor. Shielded pair. | | A19 | Red/Blue | Engine Coolant Temp (ECT) Signal | Analog (0-5V) | 2.5V at warm, 4.5V cold. | | A20 | Green/White | Throttle Position Sensor (TPS) Signal | Analog (0-5V) | 0.4V idle, 4.2V WOT. | | A21 | Pink | Manifold Absolute Pressure (MAP) | Analog (0-5V) | 1.5V idle, 4.0V boost. | | A22 | Gray/Red | Intake Air Temp (IAT) | Analog (0-5V) | In MAF or manifold. | | A23 | Black/Red | Oxygen Sensor (O2) Signal | Narrowband (0-1V) | 0.1V lean, 0.9V rich. | | A24 | Pink/Black | Knock Sensor Signal | Analog AC | Sensitive to RF noise. | | A25 | Empty | N/A | - | - | | A26 | Black/Yellow | Sensor Ground (Return) | GND | Shared ground for TPS, ECT, MAP. | Connector A (E01) – 26 Pins – Main

The K6A ECU typically uses a multi-connector setup, commonly seen as a 60-pin (C37) and 34-pin (E23) configuration in many Denso-based models. Below are the critical pin functions you will encounter: Fuel & Ignition:

Total common pins: 64 (32+32) or 56 (32+24) on earlier models.