What wire color is the ECT sensor signal on a 1994 Bronco 5.0L?

The Engine Coolant Temperature (ECT) sensor signal is circuit 354, light green/red (LG/R), running from connector C183 to PCM pin 7.

Which PCM pin does the Throttle Position sensor connect to?

The TP sensor signal is circuit 355 GY/W (gray/white) from connector C1024 to PCM pin 47; the sensor also uses circuit 351 BR/W and shares signal return 359 GY/R.

What is the common signal return circuit for the engine sensors?

Circuit 359 (GY/R, gray/red) is the shared signal return for the KS, ECT, IAT, TP, and EVP sensors, joined at splice S161, with routing differing with or without the E4OD or 4R70W transmission.

What does the EVP sensor do according to this diagram?

The EGR Valve Position (EVP) sensor (connector C182) indicates EGR valve position to the PCM by providing a voltage signal proportional to EGR position, depending on engine operating condition. Its signal is circuit 351 BR/W, becoming 352 BR/LG to PCM pin 27.

What is the IAT sensor circuit and PCM pin?

The Intake Air Temperature (IAT) sensor at connector C164 uses signal circuit 743 GY (gray) to PCM pin 25, passing through connector C101.

Home/ Registry/ Ford/ Bronco/ 1992-1996/ 1994 Ford Bronco/ Photo supermotors.net/registry/media/486208

1994 Ford Bronco/F-Series 5.0L Engine Controls Wiring Diagram - ECT, TP, EGR, PCM

Engine Controls 5.0L wiring diagram with color-coded wires, sensors, and PCM connectors

‹ ›

Engine controls 5.0L wiring diagram showing color-coded circuits for knock, ECT, TP, and EGR sensors to the PCM.

AI caption February 2007 · Photo 243 of 1902

This is a scanned page (24-5) from a 1994 Ford Bronco/F-Series electrical/vacuum troubleshooting manual showing the Engine Controls wiring diagram for the 5.0L engine. It depicts the sensor input side of the Powertrain Control Module (PCM, connector C185), covering the Knock Sensor (KS, C1009), Engine Coolant Temperature (ECT) sensor (C183), Intake Air Temperature (IAT) sensor (C164), Throttle Position (TP) sensor (C1024), and EGR Valve Position (EVP) sensor (C182). Each sensor shares a common signal return circuit 359 (GY/R) through splice S161, with notes distinguishing routing with or without E4OD/4R70W transmissions. Signal wires and PCM pins are identified: 310 Y/R (KS, pin 23), 354 LG/R (ECT, pin 7), 743 GY (IAT, pin 25), 355 GY/W (TP, pin 47), and 351 BR/W / 352 BR/LG (EVP, pin 27, through splice S135). Explanatory callouts describe how each sensor works (thermistors, potentiometer, detonation detection) and how the PCM uses their signals for fuel delivery, spark timing, and EGR control. Bottom PCM pins 4, 16, 36, and 56 (wires 382 Y/BK, 259 O/R, 929 PK, 395 GY/O) route to the ignition system on page 21-1. Component locator grid references (151-4) are included for each connector.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What wire color is the ECT sensor signal on a 1994 Bronco 5.0L?: The Engine Coolant Temperature (ECT) sensor signal is circuit 354, light green/red (LG/R), running from connector C183 to PCM pin 7.
Which PCM pin does the Throttle Position sensor connect to?: The TP sensor signal is circuit 355 GY/W (gray/white) from connector C1024 to PCM pin 47; the sensor also uses circuit 351 BR/W and shares signal return 359 GY/R.
What is the common signal return circuit for the engine sensors?: Circuit 359 (GY/R, gray/red) is the shared signal return for the KS, ECT, IAT, TP, and EVP sensors, joined at splice S161, with routing differing with or without the E4OD or 4R70W transmission.
What does the EVP sensor do according to this diagram?: The EGR Valve Position (EVP) sensor (connector C182) indicates EGR valve position to the PCM by providing a voltage signal proportional to EGR position, depending on engine operating condition. Its signal is circuit 351 BR/W, becoming 352 BR/LG to PCM pin 27.
What is the IAT sensor circuit and PCM pin?: The Intake Air Temperature (IAT) sensor at connector C164 uses signal circuit 743 GY (gray) to PCM pin 25, passing through connector C101.