1kz Ecu Pinout |best| Jun 2026

If you are diagnosing a no-start issue on your 1KZ-TE engine, use these voltage checks directly at the ECU pins: Step 1: Check System Voltage

For a standard 1KZ-TE swap or troubleshooting, you'll generally look for these primary connections:

You need at minimum:

Check for 12V at the +B pin and toggling voltage at the SPV pin while cranking. 1kz ecu pinout

1KZ-TE ECU Pinout and Wiring Guide | PDF | Throttle - Scribd

: An ECU for a 90 Series Prado might not fit or function correctly in a 70 Series Land Cruiser due to different connector shapes and sensor inputs.

Direct unswitched power from the battery via a fuse. This maintains the ECU’s long-term memory and Diagnostic Trouble Codes (DTC). If you are diagnosing a no-start issue on

The Engine Control Unit (ECU) maps electrical connection points for sensors and actuators. Depending on the model year (Early vs. Late), the pin configuration may vary. : +B, +BF : Battery power supply. IGSW : Ignition switch signal to activate the ECU. BATT : Continuous battery power for memory. Sensor Inputs : THW / THA : Water and Air temperature sensor signals. PIM : Intake manifold pressure (Boost) sensor. NE+ / NE- : Engine revolution (Crankshaft Position) sensor. TDC+ : Top Dead Center signal for timing. Control Outputs :

: This is the fully mechanical version of the engine. It uses a mechanical injector pump, making it simpler and less reliant on electronics. If you have this engine, you likely have minimal wiring to worry about, and it will not require the complex ECU pinout discussed in this article.

This is the most important wire. It controls the high-pressure fuel delivery. TCV: Timing Control Valve. GIND: Glow plug indicator light on the dash. Common Wiring Pitfalls This maintains the ECU’s long-term memory and Diagnostic

Check sensor grounds: Pin E2 should be 0V relative to battery negative.

| Pin | Signal | Notes | |-----|--------|-------| | B1 | #10 (Injector 1) | To spill control valve? No – wait: 1KZ-TE has – it has a rotary pump with electronic spill valve | | B2 | #20 (Injector 2) | Not used – correction: 1KZ-TE uses spill valve control from pump | | Actually – Key signals on B: | | | B6 | PCV (EGR vacuum control) | | | B7 | VSV (Fuel pressure up – cold start) | | | B8 | RSC (Rotational speed control – spill valve) | Main fuel quantity control | | B9 | TCV (Timing control valve) | Injection timing | | B10 | FSV (Fuel shutoff valve) | Stop solenoid | | B12 | IACV (Idle air control) | Stepper motor |

Measure the voltage at the SPV valve. You should see 12V when the ignition is turned on.

Before probing wires, you must identify your specific ECU variant. Toyota updated the plug designs and pin configurations across production years: