What PCM pin does the Throttle Position Sensor (TPS) signal connect to on the 5.8L?

The TPS signal is circuit 355 GY/W (gray/white) and connects to PCM pin 47.

What wire feeds the ECT, IAT, TPS and EVP sensors on the 5.8L engine controls?

Circuit 359 GY/R (gray/red), distributed through splice S161, feeds the ECT, IAT, TPS, and EVP sensors.

What does the EGR Control Solenoid do?

It regulates the amount of vacuum applied to the EGR valve. It gets 12V (relay energized) on circuit 361 R and its control wire 360 BR/PK goes to PCM pin 33 through C101.

How do the ECT and IAT sensors work according to this diagram?

Both are thermistors whose resistance decreases as temperature increases. The PCM detects the voltage drop and uses it to calculate fuel delivery, spark timing, idle speed, and EGR control.

What circuits run from the PCM to the ignition system?

PCM pins 4, 16, 36, and 56 output circuits 382 Y/BK, 259 O/R, 929 PK, and 395 GY/O (via C185) to the Ignition System, shown on page 21-1.

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Ford 5.8L Engine Controls Wiring Diagram - PCM, ECT, IAT, TPS, EGR Sensors 25-3

Ford 25-3 Engine Controls 5.8L wiring diagram with EGR, ECT, IAT, TPS and EGR valve position sensors

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Engine controls wiring diagram for 5.8L showing EGR control solenoid, coolant/intake air temperature, throttle position and EGR valve position sensors.

Part of 1992-1996 Ford Bronco Wiring Diagrams

AI caption August 2018 · Photo 346 of 378

This document is page 25-3 of a Ford factory-style wiring diagram covering Engine Controls for the 5.8L engine. It shows the sensor input side of the Powertrain Control Module (PCM), including the EGR Control Solenoid (connector C180), Engine Coolant Temperature (ECT) sensor (C183), Intake Air Temperature (IAT) sensor (C164), Throttle Position Sensor (TPS, via C1024), and EGR Valve Position (EVP) sensor (C182). Callout boxes describe each component's function: the ECT and IAT are thermistors whose resistance decreases with temperature, the TPS is a potentiometer indicating throttle plate angle, and the EVP provides a voltage signal proportional to EGR valve position. The diagram documents wire circuit numbers and colors: 361 R (12V relay-energized feed), 359 GY/R (sensor reference via splice S161), 360 BR/PK, 354 LG/R, 743 GY, 355 GY/W, 351 BR/W (splice S135), and 352 BR/LG, along with PCM pin numbers (2, 33, 23, 7, 25, 47, 27, and outputs 4, 16, 36, 56 with circuits 382 Y/BK, 259 O/R, 929 PK, 395 GY/O to the ignition system, page 21-1). Connectors C101 and C185 are shown as pass-throughs. Notes reference E4OD transmission brake input (511 LG, 310 Y/R) and Turn/Stop/Hazard Lamps page 90-2.

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Frequently asked questions

What PCM pin does the Throttle Position Sensor (TPS) signal connect to on the 5.8L?: The TPS signal is circuit 355 GY/W (gray/white) and connects to PCM pin 47.
What wire feeds the ECT, IAT, TPS and EVP sensors on the 5.8L engine controls?: Circuit 359 GY/R (gray/red), distributed through splice S161, feeds the ECT, IAT, TPS, and EVP sensors.
What does the EGR Control Solenoid do?: It regulates the amount of vacuum applied to the EGR valve. It gets 12V (relay energized) on circuit 361 R and its control wire 360 BR/PK goes to PCM pin 33 through C101.
How do the ECT and IAT sensors work according to this diagram?: Both are thermistors whose resistance decreases as temperature increases. The PCM detects the voltage drop and uses it to calculate fuel delivery, spark timing, idle speed, and EGR control.
What circuits run from the PCM to the ignition system?: PCM pins 4, 16, 36, and 56 output circuits 382 Y/BK, 259 O/R, 929 PK, and 395 GY/O (via C185) to the Ignition System, shown on page 21-1.