Ford 5.8L Engine Controls Wiring Diagram 25-4 - MAP Sensor, HO2S, PCM (Bronco)

This document is page 25-4 of a Ford factory-style wiring diagram set covering Engine Controls for the 5.8L engine. It shows the wiring for the Manifold Absolute Pressure (MAP) sensor (connector C1011), the VIP Data Link Connector (C198), and the Heated Oxygen Sensor (HO2S, connector C1025), all terminating at the Powertrain Control Module (PCM) at connector C185 (pins 45, 26, 46, 49, and 29). Power for the HO2S heater comes from a 15A fuse in the Engine Compartment Fuse Box (Hot in Run, see Power Distribution page 13-4) via circuit 298 (P/O). Key circuits include 359 GY/R (MAP/reference), 89 O, 358 LG/BK, 351 BR/W, 74 GY/LB (signal return), and ground circuit 57 BK to grounds G101/G100 (see Grounds pages 10-3/10-5). Splices and connectors shown include S137, S122, S163, S165, S105, S134, C101, C103, C1003, S100, S102. Notes distinguish applications: Bronco & Lightning, 5.8L under 8500 lbs GVW, and 5.8L over 8500 lbs. Callouts explain that the MAP sensor measures atmospheric pressure for fuel ratio, transmission line pressure, and shift scheduling, and that the HO2S provides a voltage related to exhaust oxygen content. A cross-reference points to E4OD transmission wiring on page 30-1.