| Pin | Wire Color | Signal | Description | | :--- | :--- | :--- | :--- | | C1 | Black | #1 | Injector 1 (Cylinder 1) – High voltage signal | | C2 | Black | #2 | Injector 2 | | C3 | Black | #3 | Injector 3 | | C4 | Black | #4 | Injector 4 | | C10 | Red/White | SCV+ | Suction Control Valve (Fuel rail pressure control) | | C11 | Red/Black | SCV- | Suction Control Valve Return | | C12 | Blue | PCV+ | Pressure Control Valve (Rail pressure relief) | | C14 | Yellow | VNT | Variable Nozzle Turbo Actuator (Duty cycle control) | | C20 | Green/Black | EGR | EGR Valve Stepper Motor Coil 1 | | C21 | Green/White | EGR | EGR Valve Stepper Motor Coil 2 | | C25 | Orange | MIL | Check Engine Light (To dashboard) | | C28 | White/Black | FAN | Cooling Fan Relay Control | | C29 | Red/Black | A/C | A/C Cut Signal (ECU turns off AC under heavy load) | Usually a separate 12-pin connector.
A: Search for "Toyota Hilux AN120 EWD" in PDF format. The official manual is 500+ pages. The pinout data in this article is accurate for 2011-2015 models, but Toyota issued a revision in 2016 that moved the VNT actuator pin from C14 to C18. Conclusion: Respect the Wiring The Toyota 2KD-FTV ECU is robust, but it is also sensitive. A single short to ground on the 5V reference (Pin A24 – VCP) will kill the MAP, IAT, and Crank position sensors simultaneously, resulting in a crank-no-start that looks like a mechanical failure.
| ECU Pin | Function | Action | | :--- | :--- | :--- | | | MAP (Boost pressure) | Intercept this. You will add 0.5V to fool the ECU into thinking boost is lower. | | B10 | MAF (Airflow) | Cut and feed modified signal. (Less common on 2KD; usually just MAP) | | C10 & C11 | SCV (Rail pressure) | DO NOT CUT. Tap only to monitor. Modifying SCV kills fuel pumps. | | B22 | Common Rail Pressure (VCM) | Intercept this. Lower the voltage by 0.3V to increase rail pressure. | | D1 & D2 | CAN Bus | If using a high-end module (e.g., Steinbauer), you read CAN here. |
| Pin | Wire Color | Signal | Description / Voltage | | :--- | :--- | :--- | :--- | | A1 | White | E2 | ECU Ground (Power) | | A2 | White/Black | E1 | ECU Ground (Sensor Reference) | | A3 | Red | BATT | Permanent +12V (Memory & Clock) | | A4 | Black/Yellow | +B | Main Relay Power (+12V via EFI relay) | | A6 | Black/Orange | MREL | Main Relay Control (ECU switches ground) | | A17 | Black/White | E01 | Injector Driver Ground (High current) | | A18 | Black | E02 | Injector Driver Ground (High current) | | A24 | Blue/Red | VCP | 5V Sensor Supply Output | This is where the ECU "feels" the engine.
| Pin | Wire Color | Signal | Description / Diagnostic Tip | | :--- | :--- | :--- | :--- | | B1 | Red/Blue | PIM | Manifold Absolute Pressure (MAP) – 0.5V idle, 4.5V boost | | B2 | Yellow/Black | CAL | Accelerator Pedal Position Sensor 1 (Main) | | B3 | Blue/Yellow | VPA | Accelerator Pedal Position Sensor 2 (Sub) | | B5 | Green/White | THW | Engine Coolant Temp (ECT) – ~2.5V cold, 0.5V hot | | B6 | Blue/Black | THA | Intake Air Temp (IAT) – Inside MAF sensor | | B10 | White | VG | Air Flow Meter (MAF) Frequency signal | | B12 | Red/Black | NE+ | Crankshaft Position Sensor (CKP) – 2.5V AC at crank | | B13 | Blue | NE- | CKP Ground | | B14 | Green | G+ | Camshaft Position Sensor (CMP) | | B15 | Yellow/Red | G- | CMP Ground | | B20 | Pink | STP | Brake Switch Signal (Stops cruise control) | | B22 | Light Green | NSW | Neutral Start Switch (Park/Neutral) | | B30 | Purple/White | VCM | Fuel Temperature Sensor (Inside SCV) | | B35 | Gray | KNK | Knock Sensor (Microphone signal for diesel knock) | The ECU "talking back" to the engine.
