What wire color is the left heated oxygen sensor (HO2S) signal to the PCM?

Circuit 726 BU/W (blue/white) connects the left HO2S through connector C127 to the PCM. The sensor's ground side uses 62 BK/BL and 60 BK to ground G104 via splices S195 and S110.

What circuits control the EGR solenoid valves?

The EGR Solenoid Valve (Vent) at C1006 uses circuit 756 W/BL, and the EGR Solenoid Valve (Vacuum) at C1007 uses circuit 755 GN/W to connector C246 at the PCM. Both are powered by circuit 702 R/BK.

What does the Canister Purge (CANP) Solenoid Valve do according to this diagram?

It allows gasoline vapors into the engine to be burned; a charcoal-filled canister collects and stores vapors from the fuel tank. Its control circuit is 717 BL/BK through connectors C185 and C247.

What do the asterisks (*) and (**) mean on this diagram?

A single asterisk (*) indicates manual transaxle and a double asterisk (**) indicates automatic transaxle, applying to connectors such as C151* and C126**.

Where do the PCM ground circuits go?

Circuit 65 BK/R runs through the C106 joint connector (page 10-9) to ground G106, and 60 BK goes to ground G104. See grounds pages 10-9, 10-10, and 10-11 are referenced.

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Ford Probe PCM Wiring Diagram - HO2S, EGR & Canister Purge Solenoid Circuits

Wiring diagram for EVAP canister purge, EGR solenoid valves and heated oxygen sensor

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Wiring diagram showing canister purge solenoid, EGR solenoid valves, heated oxygen sensor and PCM circuits.

AI caption December 2010 · Photo 52 of 676

This document is a scanned page from a Ford Probe wiring diagram covering the Powertrain Control Module (PCM) and emissions-related circuits. It shows the left Heated Oxygen Sensor (HO2S), Canister Purge (CANP) Solenoid Valve, EGR Solenoid Valve (Vent), and EGR Solenoid Valve (Vacuum), all fed by circuit 702 (R/BK) from splice S189/S199 and splice S182. The PCM (solid state) receives signals on circuit 726 BU/W (HO2S), 717 BL/BK (CANP via C247), 756 W/BL (EGR vent), and 755 GN/W (EGR vacuum via C246). Connectors shown include C180, C126, C127, C151, C185, C1005, C1006, C1007, C106 (joint connector), C246, C247, and C248. Grounds are routed through circuits 60 BK, 62 BK/BL, and 65 BK/R to grounds G104 and G106, with references to grounds pages 10-9 through 10-11. A legend distinguishes manual transaxle (*) versus automatic transaxle (**) connector usage, and circuits 750 BL/O, 742 BL/PK, and 740 LG/O route to the ignition system (page 21-5) and 4EAT transaxle (page 29-5, automatic transaxle only, via splice S2013). Explanatory callouts describe how the HO2S, canister purge, and EGR solenoids operate under PCM control.

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Frequently asked questions

What wire color is the left heated oxygen sensor (HO2S) signal to the PCM?: Circuit 726 BU/W (blue/white) connects the left HO2S through connector C127 to the PCM. The sensor's ground side uses 62 BK/BL and 60 BK to ground G104 via splices S195 and S110.
What circuits control the EGR solenoid valves?: The EGR Solenoid Valve (Vent) at C1006 uses circuit 756 W/BL, and the EGR Solenoid Valve (Vacuum) at C1007 uses circuit 755 GN/W to connector C246 at the PCM. Both are powered by circuit 702 R/BK.
What does the Canister Purge (CANP) Solenoid Valve do according to this diagram?: It allows gasoline vapors into the engine to be burned; a charcoal-filled canister collects and stores vapors from the fuel tank. Its control circuit is 717 BL/BK through connectors C185 and C247.
What do the asterisks (*) and (**) mean on this diagram?: A single asterisk (*) indicates manual transaxle and a double asterisk (**) indicates automatic transaxle, applying to connectors such as C151* and C126**.
Where do the PCM ground circuits go?: Circuit 65 BK/R runs through the C106 joint connector (page 10-9) to ground G106, and 60 BK goes to ground G104. See grounds pages 10-9, 10-10, and 10-11 are referenced.