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Ford 4.9L Engine Controls Wiring Diagram - MAP, EVP, TPS & PCM (Page 23-4)
Reference · 1992-1996 BroncoAll 411 wiring diagrams
Ford 4.9L engine controls wiring diagram of MAP, EGR valve position (EVP) and throttle position (TPS) sensor circuits to the PCM.
Part of 1992-1996 Ford Bronco Wiring Diagrams
This is page 23-4 of a Ford factory-style wiring diagram covering Engine Controls for the 4.9L engine. It shows the wiring between the Powertrain Control Module (PCM) and three sensors: the Manifold Absolute Pressure (MAP) sensor at connector C1011, the EGR Valve Position (EVP) sensor at connector C182, and the Throttle Position Sensor (TPS) at connector C1026. Circuit 359 (GY/R) provides reference voltage, distributed through splices S137 and S161 and connector C101, with a branch to the E4OD transmission (page 30-1) and the VIP Data Link Connector (C198). Sensor return circuit 351 (BR/W) runs through splices S163 and S135. Signal circuits shown include 358 LG/BK (MAP), 352 BR/LG (EVP), and 355 GY/W (TPS via C185). Circuit 89 (O) is shown for 'all except Bronco' through splice S122 to C103 (not used). PCM pins 49, 46, 45, 26, 27, 47, 36, 56, 16, and 4 are labeled, with circuits 929 PK, 395 GY/O, 259 O/R, and 382 Y/BK feeding the ignition system (page 21-1). Descriptive callouts explain the function of the TP sensor, EVP sensor, MAP sensor, and PCM.
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Frequently asked questions
- What sensors are shown on the 4.9L engine controls diagram page 23-4?
- The Manifold Absolute Pressure (MAP) sensor (connector C1011), EGR Valve Position (EVP) sensor (connector C182), and Throttle Position Sensor (TPS) (connector C1026), all wired to the Powertrain Control Module (PCM).
- What wire color is the reference voltage circuit to the MAP, EVP, and TP sensors?
- Circuit 359, gray with red stripe (GY/R), routed through splices S137 and S161 and connector C101, with a branch to the E4OD transmission and the VIP Data Link Connector (C198).
- What is the sensor return circuit for these sensors?
- Circuit 351, brown with white stripe (BR/W), running through splices S163 and S135 and connector C101 to PCM pin 46.
- What does the MAP sensor do according to this diagram?
- It measures atmospheric pressure for the PCM to adjust fuel/air ratio, transmission line pressure, and shift scheduling for high altitude operation.
- Which circuits connect the PCM to the ignition system?
- Circuits 929 PK, 395 GY/O, 259 O/R, and 382 Y/BK leave PCM pins 36, 56, 16, and 4 and go to the ignition system on page 21-1.
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