: Early 1KZ units (like the KZN130) may lack certain pins found on later KZN185/KZN165 models, such as immobilizer signals (Code 99) or EGR valve lift sensors (Code 96). Transmission Type
The 1KZ ECU is a sophisticated computer system that controls the engine's functions, including fuel injection, ignition timing, and emission control. The ECU receives data from various sensors, processes the information, and sends signals to the engine's actuators to optimize performance, efficiency, and emissions.
Controls the fuel quantity injected into the cylinders. TCV (Timer Control Valve): Adjusts injection timing. S-REL: Glow plug relay control. W: Check Engine Light (MIL) output. Variations Between Models
5V reference power supply output from the ECU to the sensors (TPS, Map Sensor). VTA: Throttle Position Sensor (TPS) signal output. 1kz ecu pinout
Permanent 12V battery power used to keep the ECU's internal memory (DTC codes) alive.
The Spill Control Valve requires its own high-current 12V power supply feed, while its negative side registers straight to the SPV pin on the ECU.
: Timer Control Valve; manages the injection timing advance. Variation by Model and Year : Early 1KZ units (like the KZN130) may
Neutral Start Switch input, preventing starting unless in Park or Neutral.
Cleaned and re-pinned ground circuit. Cost: $0.
The 1KZ-TE ECU typically uses : 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. Controls the fuel quantity injected into the cylinders
This comprehensive guide breaks down the 1KZ-TE ECU pinouts for both the early-generation 26-pin/16-pin/22-pin plug configurations and the later-generation board layouts. 1KZ-TE ECU Plug Configurations
Main chassis ground for the ECU casing and logic circuit.
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