What sensors are shown on this 5.8L engine controls wiring diagram?

The Intake Air Temperature (IAT) sensor (connector C164) and the Heated Oxygen Sensor (HO2S) #11, both wired to the Powertrain Control Module (PCM).

What wire color is circuit 359 in this diagram?

Circuit 359 is GY/R (gray/red), running through connectors C101F/C101M and splice S137.

What circuit carries the heated oxygen sensor signal to the PCM?

Circuit 74 GY/LB carries the HO2S signal through connectors C1003F/C1003M and splice S122 to the PCM; circuit 387 R/W runs through splice S123.

Which engine and GVW rating does this diagram apply to?

It applies to Engine Controls for the 5.8L engine, Under 8500 GVW (section 25-4, page 96).

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

96 Bronco 25-4 Engine Controls 5.8L under 8500 GVW wiring diagram: intake air temperature sensor, heated oxygen sensor, PCM

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Engine controls wiring diagram for 1996 Ford Bronco 5.8L showing intake air temperature and heated oxygen sensor circuits.

AI caption July 2017 · Photo 254 of 386

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.

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Frequently asked questions

What sensors are shown on this 5.8L engine controls wiring diagram?: The Intake Air Temperature (IAT) sensor (connector C164) and the Heated Oxygen Sensor (HO2S) #11, both wired to the Powertrain Control Module (PCM).
What wire color is circuit 359 in this diagram?: Circuit 359 is GY/R (gray/red), running through connectors C101F/C101M and splice S137.
What does the IAT sensor do according to this diagram?: It is 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.
What circuit carries the heated oxygen sensor signal to the PCM?: Circuit 74 GY/LB carries the HO2S signal through connectors C1003F/C1003M and splice S122 to the PCM; circuit 387 R/W runs through splice S123.
Which engine and GVW rating does this diagram apply to?: It applies to Engine Controls for the 5.8L engine, Under 8500 GVW (section 25-4, page 96).