What wire color is the reference voltage feed to the TPS, EGR position, and MAP sensors?

Circuit 351, orange/white (O/W), which runs through connector C191 and splices S152 and S130 to the EGR valve position sensor, throttle position sensor, MAP sensor, and ECA pin 26.

Which ECA pin does the throttle position sensor signal go to?

The TPS signal is circuit 355 DG/LG, which passes through connector C191 to ECA pin 47.

What is the signal return (ground) circuit for the EEC sensors on this diagram?

Circuit 359 BK/W (black/white) is the common signal return, joining at splices S151, S150, and S132 and running through connectors C1984 and C190 to ECA pin 46.

What circuit and color is the MAP sensor signal wire?

The MAP sensor signal is circuit 356, dark blue/light green (DB/LG), going to ECA pin 45.

Which wires go to the EEC test connectors?

Circuit 209 W/R runs from ECA pin 48 to EEC test connector C1985, and circuit 382 Y/BK runs from ECA pin 17 to EEC test connector C1984.

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Ford EEC Wiring Diagram - 8 Cyl SFI Sensor Circuits (1986 Mustang, Page 109)

Electronic engine control wiring diagram for 8-cylinder SFI showing sensor circuits

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Wiring diagram of electronic engine control for an 8-cylinder SFI, showing EGR, throttle position, MAP, and coolant temperature sensor circuits.

AI caption April 2012 · Photo 10 of 54

This page (109) is a factory-style wiring diagram titled "Electronic Engine Control (8 CYL SFI)," covering the sensor input circuits of the EEC system on a V8 sequential fuel injection engine. It shows how the Electronic Control Assembly (ECA) connects to five sensors: the EGR valve position sensor, throttle position sensor, manifold absolute pressure (MAP) sensor, engine coolant temperature sensor, and manifold charge temperature sensor. Each circuit is labeled with its circuit number and wire color: 351 O/W is the shared reference voltage feed distributed through splices S152 and S130; sensor signal wires are 352 BR/LG (EGR position, ECA pin 27), 355 DG/LG (throttle position, pin 47), 356 DB/LG (MAP, pin 45), 354 LG/Y (coolant temperature, pin 7), and 357 LG/P (manifold charge temperature, pin 25). Circuit 359 BK/W is the common signal return/ground, tying together at splices S151, S150, and S132 and passing through connectors C1984 and C190. Two EEC TEST diagnostic connector legs are shown: circuit 209 W/R to C1985 from ECA pin 48, and circuit 382 Y/BK to C1984 from ECA pin 17. Connector C191 appears in several circuits as a bulkhead/inline connector. The diagram is useful for tracing EEC sensor wiring, pin numbers, and wire colors.

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Frequently asked questions

What wire color is the reference voltage feed to the TPS, EGR position, and MAP sensors?: Circuit 351, orange/white (O/W), which runs through connector C191 and splices S152 and S130 to the EGR valve position sensor, throttle position sensor, MAP sensor, and ECA pin 26.
Which ECA pin does the throttle position sensor signal go to?: The TPS signal is circuit 355 DG/LG, which passes through connector C191 to ECA pin 47.
What is the signal return (ground) circuit for the EEC sensors on this diagram?: Circuit 359 BK/W (black/white) is the common signal return, joining at splices S151, S150, and S132 and running through connectors C1984 and C190 to ECA pin 46.
What circuit and color is the MAP sensor signal wire?: The MAP sensor signal is circuit 356, dark blue/light green (DB/LG), going to ECA pin 45.
Which wires go to the EEC test connectors?: Circuit 209 W/R runs from ECA pin 48 to EEC test connector C1985, and circuit 382 Y/BK runs from ECA pin 17 to EEC test connector C1984.