What connector does this PCM pinout cover?

It covers connector C181, the 104-pin Powertrain Control Module (PCM) connector, listing all pins 1–104 with circuit numbers, wire colors, and functions.

Which PCM pins are power grounds?

Pins 3, 23, 24, 51, 76, 77, and 103 are Power Ground on circuit 570 (BK/W); pin 25 is Case Ground on circuit 57 (BK).

Where are the fuel injector control pins on this PCM?

Injector #1 is pin 75 (555 T), #2 pin 101 (556 W), #3 pin 74 (557 BR/Y), #4 pin 100 (558 BR/LB), #5 pin 73 (559 T/BK), #6 pin 99 (560 LG/O), #7 pin 72 (561 T/R), and #8 pin 98 (562 LB).

Which pins carry the crankshaft position (CKP) sensor signals?

Pins 21 and 22 — circuit 350 (GY) and circuit 349 (DB) — are the Crankshaft Position (CKP) Sensor inputs.

What pin is the vehicle speed sensor (VSS) input?

Pin 58, circuit 679 (GY/BK), is the Vehicle Speed Sensor (VSS) Input.

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

Powertrain control module C191 connector pinout with full circuit table

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Wiring diagram of the PCM connector C191 showing all pins, color-coded circuits and their functions.

AI caption September 2010 · Photo 498 of 579

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.

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Frequently asked questions

What connector does this PCM pinout cover?: It covers connector C181, the 104-pin Powertrain Control Module (PCM) connector, listing all pins 1–104 with circuit numbers, wire colors, and functions.
Which PCM pins are power grounds?: Pins 3, 23, 24, 51, 76, 77, and 103 are Power Ground on circuit 570 (BK/W); pin 25 is Case Ground on circuit 57 (BK).
Where are the fuel injector control pins on this PCM?: Injector #1 is pin 75 (555 T), #2 pin 101 (556 W), #3 pin 74 (557 BR/Y), #4 pin 100 (558 BR/LB), #5 pin 73 (559 T/BK), #6 pin 99 (560 LG/O), #7 pin 72 (561 T/R), and #8 pin 98 (562 LB).
Which pins carry the crankshaft position (CKP) sensor signals?: Pins 21 and 22 — circuit 350 (GY) and circuit 349 (DB) — are the Crankshaft Position (CKP) Sensor inputs.
What pin is the vehicle speed sensor (VSS) input?: Pin 58, circuit 679 (GY/BK), is the Vehicle Speed Sensor (VSS) Input.