Ford 5.8L Engine Controls Wiring Diagram - IAT & Oxygen Sensor to PCM (Pg 96)

This document is page 96 (section 25-4) of a Ford wiring diagram set covering Engine Controls for the 5.8L engine, Under 8500 GVW. It shows the circuits for the Intake Air Temperature (IAT) sensor and the Heated Oxygen Sensor (HO2S) #11 as they connect to the Powertrain Control Module (PCM). Wire circuit numbers and colors are labeled, including circuit 359 GY/R (signal return/ground path through splice S137 and connectors C101F/C101M), 361 R (hot in run feed from S136 on page 25-1), 74 GY/LB (HO2S signal through C1003F/C1003M and splice S122), 387 R/W (through splice S123), 351 BR/W and 743 GY into the PCM. Connectors shown include C164 (IAT sensor), C110F/C110M, C1003M/C1003F, C1025F/C1025M, C101M/C101F, and C1027. Explanatory notes describe the IAT sensor as a thermistor that decreases resistance as intake air temperature increases (the PCM uses voltage drops to calculate idle fuel delivery, spark timing and EGR control), and the HO2S as providing a voltage related to oxygen content of exhaust gases for air/fuel ratio regulation. Cross-references point to S146 on page 25-5 and S136 on page 25-1, and PCM pin numbers are shown along the bottom.