| Pin | Signal | |-----|--------| | D1 | SIL (Serial communication – Toyota scan tool) | | D4 | CG (Chassis ground) | | D5 | SG (Signal ground) | | D7 | K-Line (ISO 9141-2) – if OBD-II compliant | | D9 | +B (Battery power) | | D14 | TC (Diagnosis terminal – same as C7) | | D16 | +B (Switched ignition) |
| Pin | Function | Signal / Notes | |-----|------------------------------|------------------------------------------| | 1 | Battery +12V (main) | Constant power | | 2 | Ground | ECU ground | | 3 | Ignition switch +12V (IG) | Switched power | | 4 | Fuel injection pump – spill valve | Actuator control | | 5 | Fuel temp sensor | Signal | | 6 | Engine coolant temp sensor | Signal | | 7 | Accelerator position sensor (main) | 0-5V output | | 8 | Accelerator position sensor (sub) | Redundant signal | | 9 | Crankshaft position sensor + | Reluctance or Hall effect | | 10 | Crankshaft position sensor - | Signal return | | 11 | Camshaft position sensor | G signal (if equipped) | | 12 | Tachometer output | To cluster (diesel tach) | | 13 | Check engine light | Ground when fault | | 14 | Diagnostic enable (TE1) | Ground to enable diagnostic mode | | 15 | Diagnostic data (TC) | E1–TC1 jumper for flash codes | | 16 | Glow plug relay control | Output to relay | | 17 | EGR vacuum solenoid | Output | | 18 | Fuel cut solenoid | +12V during run (anti-theft) | | 19 | Injection timing control valve | For spill collar (early) or EDU | | 20 | Neutral start switch (AT) | Ground in P/N | | 21 | AC cut request | To ECU from AC amplifier | | 22 | Alternator L-terminal | Charge lamp / excitation |
Note: Pins 4, 19, 20 may vary by model year and transmission type. 1kz ecu pinout
The 1KZ-TE ECU typically uses three main connectors: A, B, and C (sometimes labeled 1, 2, and 3). Depending on the chassis (Prado vs. Surf vs. Hiace), wire colors may vary slightly, but the pin functions remain largely consistent.
Note: Please verify wire colors with your specific year model. Toyota sometimes changed wire colors between production years. | Pin | Signal | |-----|--------| | D1
(Plug 1 - Injection System) | Pin | Name | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | IGSW | Ignition Power | Black/White | | 3 | E01 | Engine Ground | Brown | | 5 | #10 | Injector 1 | Red | | 6 | #20 | Injector 2 | White | | 7 | #30 | Injector 3 | Green | | 8 | #40 | Injector 4 | Blue | | 9 | E1 | Sensor Ground | Brown | | 10 | +B | Battery Power | Black/Orange | | 12 | STA | Starter Signal | Black/White |
(Plug 2 - Sensors & Pump Control) | Pin | Name | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | SPD | Speed Sensor | Pink | | 4 | THW | Coolant Temp | Green/White | | 5 | THA | Intake Air Temp | Light Green/Red | | 9 | ELS | Electrical Load | Green/White | | 10 | W | Check Engine Light | Yellow/Red | | 15 | TCO | A/C Compressor Signal | | | 16 | TACH | Tachometer Output | Black/Orange | | 22 | TE1 | Diagnostic Terminal | Light Green/Red | | Pin | Function | Signal / Notes
(Plug 3 - Control System) | Pin | Name | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | TPS VCC | Throttle Position Power | Yellow | | 2 | TPS VTA | Throttle Position Signal | Green/Yellow | | 3 | TPS IDL | Idle Switch | Blue/Yellow | | 9 | NSW | Neutral Start Switch | Black/White | | 11 | E2 | Sensor Ground | Brown |