Ford Bronco SD to MAF EEC Pin-Out Chart Pins 23-54 - Speed Density Conversion

This document is one page of a multi-page EEC computer pin-out comparison table, apparently created to support a Speed Density (SD) to Mass Air Flow (MAF) EFI conversion on a Ford truck. The table lists ECU connector pins 23 through 54 across four columns, two engine-management columns (SD vs. MAF) and two transmission-related columns. For each pin it identifies the signal name, such as ACT, V-REF, EVP, NDS, CANP, TAB, TAD, EVR, SPOUT, V-PWR, INJ 3, INJ 4, GND, HEGO, MAP, MAF, SIG-RTN, TPS, STI, HEGO GND, MLPS, OD light, OD switch, EPC, TOT, 4LOW input, SS1, SS2 and TCC. Color highlighting distinguishes pins that differ between the two systems: red-highlighted cells (e.g., PSPS 302 only, Data Bus (+) 91-95, HEGO, CANP, MAP, HEGO GND, TAB, TOT, SS1) appear in one column, while blue-highlighted cells (e.g., TAB, TAD, INJ 4, INJ 3, HEGO, MAF, 4LOW input, TOT, SS1, SS2) appear in the other, showing which pins move or change function. Notes indicate some pins apply to the 302 engine only (KS, PSPS) and Data Bus (+) applies to 1991-95. Column headers are on another page of the set.