Toyota 4afe Ecu Pinout -

If your vehicle is a 1996+ model (OBD2), the pinout changes significantly.

| Pin # | Description | | --- | --- | | 20 | Diagnostic Communication (EFI) | | 21 | Serial Communication (SC) | | 22 | Check Engine Light (CEL) | toyota 4afe ecu pinout

You can interrupt the with a switch to ground. A normally closed relay that opens at a set RPM (using an aftermarket RPM window switch) will cut the NE signal, causing the ECU to think the engine stopped and cut spark. This is crude but effective. If your vehicle is a 1996+ model (OBD2),

Main ECU ground, usually connected to the intake manifold. 2. Sensor Inputs NE: Crankshaft speed sensor signal (distributor). G1/G2: Camshaft position sensor signals (distributor). THA: Intake air temperature sensor. THW: Water/coolant temperature sensor. PIM: Intake manifold pressure sensor (MAP). VTA: Throttle position sensor (TPS) signal. IDL: Throttle position sensor (idle switch). OX: Oxygen sensor signal. 3. Actuator Outputs #10/#20: Fuel injector pulse signals (Group 1 & 2). IGT: Ignition timing signal (to igniter/distributor). IGF: Ignition feedback signal (from igniter). ISC/RSC/RSO: Idle Speed Control valve. W: Check engine light control (diagnostic light). 4. Miscellaneous / Diagnostics This is crude but effective

: Idle switch signal from the TPS to tell the ECU the throttle is closed. : Speed sensor signal from the instrument cluster. ⚠️ Important Wiring Considerations Generation Shifts

: Camshaft position signals used for cylinder identification. Fuel & Air Management