2nz Fe Ecu Pinout Pdf 186 Guide

Expect 0 to 3 Volts with the ignition ON and ECM connector C disconnected. Pin A3 (Ignition Coil Feedback - IGF):

The ECU also manages the tachometer, speed sensor (SPD), and the starter signal (STA) to coordinate engine timing during cranking. Where to Find the Full PDF (186 Pin References) 2nz Fe Ecu Pinout Pdf 186

The "186" pinout is specifically challenging because Toyota multiplexed several functions. One wire might carry a starter signal and an alternator L-terminal signal. Another pin might be dual-purpose for A/C compressor lock detection and electric fan control. Expect 0 to 3 Volts with the ignition