The 1KZ-TE engine control architecture evolved over its production cycle. Before cutting or pinning into your engine harness, you must verify your specific ECU generation:
If your 1KZ-TE cranks but refuses to fire up, or dies immediately after starting, the SPV circuit is often the culprit. 1kz ecu pinout
The 1KZ-TE engine control architecture evolved over its production cycle. Before cutting or pinning into your engine harness, you must verify your specific ECU generation:
If your 1KZ-TE cranks but refuses to fire up, or dies immediately after starting, the SPV circuit is often the culprit.