| Pin | Wire Color | Signal Name | Function | Voltage / Signal | | :--- | :--- | :--- | :--- | :--- | | | White/Red | +B1 | ECU Main Relay Power (Constant 12V from relay) | 12V (Key ON) | | A2 | Black/Orange | E01 | Power Ground (Injector driver return) | 0V | | A3 | Yellow/Black | #10 | Injector Driver – Cylinder 1 | Pulse (Battery voltage spike) | | A4 | Yellow | #20 | Injector Driver – Cylinder 2 | Pulse | | A5 | Light Green | #30 | Injector Driver – Cylinder 3 | Pulse | | A6 | White/Black | E02 | Power Ground (Sensor return) | 0V | | A7 | N/A | N/C | Not Connected | - | | A8 | Blue/Red | SCV+ | Spill Control Valve (+) (Fuel quantity) | PWM (0-12V pulses) | | A9 | Blue/Yellow | SCV- | Spill Control Valve (-) (Fuel quantity) | PWM (0-12V pulses) | | A10 | Yellow/Red | MREL | Main Relay Control (ECU switches relay ground) | 12V (Key ON) | | A11 | Red/White | +B | Constant ECU Backup Power (Memory) | 12V (Constant) | | A12 | White/Blue | IGSW | Ignition Switch Signal | 12V (Key ON) | | A13 | Blue/White | Stop L | Brake Pedal Signal (for idle-up logic) | 0V (Brake off) / 12V (Brake on) | | A14 | Black/White | E03 | Sensor Ground (ECU internal) | 0V | | A15 | Brown | #40 | Injector Driver – Cylinder 4 | Pulse | | A16 | Red | VCV+ | Timing Control Valve (+) | PWM | | A17 | Light Green/Black | VCV- | Timing Control Valve (-) | PWM | | A18 | Blue/Black | EDU | EDIC (Fuel cut solenoid – early models) | 12V (Run) / 0V (Stop) | | A19 | Black/Red | E04 | Shield Ground (for sensor cables) | 0V | | A20 | N/A | N/C | Not Connected | - | | A21 | N/A | N/C | Not Connected | - | | A22 | Black/Yellow | EO1 | Power Ground (High current) | 0V |
Signal from the crankshaft/pump position sensor for RPM detection. TDC+ / TDC- (Top Dead Center): Signal to identify the piston position for timing. THW (Water Temp): Signal from the engine coolant temperature sensor. THA (Intake Air Temp): Signal from the air temperature sensor. PIM (Pressure Intake Manifold): Turbo boost pressure signal. VA / VC / IDL (Throttle Position): 1kz ecu pinout
The ECU (Engine Control Unit) for the 1KZ-TE governs critical functions including the electronically controlled injection pump, turbo pressure, and the EGR system. | Pin | Wire Color | Signal Name
: Main power supply from the EFI relay when the ignition is ON. E01 / E02 (C-13, C-26) : Primary computer grounds. Sensor Inputs NE+ / NE- (C-4, C-17) : Engine revolution signal from the engine speed sensor. TDC+ / TDC- (C-5, C-18) : Top Dead Center (crank position) signal. THA (Intake Air Temp): Signal from the air
Reset the ECU: Remove the 15A EFI fuse for 30 seconds or disconnect battery negative.