Ford PCM 104-Pin Connector C181 Pinout Diagram - Wire Colors & Pin Functions

This document is a full pinout reference for the Powertrain Control Module (PCM) 104-pin connector, identified as connector C181. The top of the page shows an illustration of the PCM connector with all 104 cavities numbered and circuit numbers with wire color codes called out around the perimeter. Below the illustration, two tables list every pin (1-104) with its circuit number, wire color code, and circuit function. Functions covered include coil-per-plug outputs #1-#8 (indicating an 8-cylinder coil-on-plug application), fuel injector controls #1-#8, all four heated oxygen sensor inputs and heaters (HO2S #11, #12, #21, #22, including catalyst monitors), crankshaft and camshaft position sensor inputs, MAF, ECT, IAT, TP, DPFE, fuel tank pressure, knock sensors #1 and #2, transmission-related circuits (shift solenoids #1-#3, EPC, TCC, TSS, TFT, TR sensor, transmission control switch), data link connector bus circuits, power grounds, VPWR power feeds, keep-alive power, and relay controls (fuel pump, HEDF, WAC, EAM solid state relay, constant control relay module). A reader can use this page to identify which wire and color corresponds to each PCM pin for diagnosis, back-probing, and wiring repair.