What does the E4OD Transmission Range (TR) sensor do according to this diagram?

It incorporates step-down resistors acting as a voltage divider; the PCM monitors the voltage corresponding to manual lever position to determine desired gear and EPC pressure. It also houses the START circuit so the vehicle starts only in Park or Neutral, plus backup lamp and 4x4 low-neutral sense circuits that close in Reverse.

What wire circuit connects the TR sensor to the PCM?

Circuit 199 (LB/Y) runs from the TR sensor through connectors C1012 and C103F/C103M to PCM pin 64 at C185. Circuit 359 (GY/R) also links the sensor network to PCM pin 91.

Which circuit feeds the backup lamps from the TR sensor?

Circuit 140 (BK/PG), hot in Reverse, goes to the backup lamps on page 95-1.

What are the TR sensor input circuits and colors?

Circuit 33 W/PK from the starting system (hot in Start), 463 R/W from all-wheel drive, 298 P/O from power distribution (hot in Run), and 359 GY/R from the PCM/engine controls circuit.

Is any part of this circuit engine-specific?

Yes, one branch of circuit 359 GY/R to Heated Oxygen Sensor (HO2S) #12 is labeled '5.8L ONLY'.

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Ford Bronco E4OD Transmission Range (TR) Sensor Wiring Diagram 30-3

96 Bronco 30-3 Transmission Controls (E4OD) wiring diagram: heated O2 sensors, transmission range sensor, starting/AWD/backup

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E4OD transmission controls wiring diagram for 1996 Ford Bronco showing oxygen sensors and transmission range sensor circuits.

AI caption July 2017 · Photo 250 of 386

This page is section 30-3, "Transmission Controls (E4OD)," from a Ford wiring diagram manual, showing the circuitry around the Transmission Range (TR) sensor for the E4OD automatic transmission. A note explains that the TR sensor uses step-down resistors as a voltage divider so the Powertrain Control Module (PCM) can read manual lever position to determine desired gear and EPC pressure; the sensor also contains the START circuit (Park/Neutral start), backup lamp, and 4x4 low-neutral sense circuits closed in Reverse. The diagram traces circuit 359 (GY/R) linking the PCM (pin 91 at C185), HO2S #21 and HO2S #12 heated oxygen sensors (with a 5.8L-only branch), engine controls via S137/C109M/C109F, and splice S148 to C1048. Inputs to the TR sensor include circuit 33 W/PK from the starting system, 463 R/W from all-wheel drive, and 298 P/O from power distribution (hot in Run). Outputs include 32 R/LB to the starting system, 57 BK to all-wheel drive, 140 BK/PG to the backup lamps, and 199 LB/Y through C1012, C103F/C103M, and C185 to PCM pin 64. Connector and page cross-references (e.g., pages 20-2, 34-1, 95-1, 24-6, 25-5, 30-2) are provided throughout.

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Frequently asked questions

What does the E4OD Transmission Range (TR) sensor do according to this diagram?: It incorporates step-down resistors acting as a voltage divider; the PCM monitors the voltage corresponding to manual lever position to determine desired gear and EPC pressure. It also houses the START circuit so the vehicle starts only in Park or Neutral, plus backup lamp and 4x4 low-neutral sense circuits that close in Reverse.
What wire circuit connects the TR sensor to the PCM?: Circuit 199 (LB/Y) runs from the TR sensor through connectors C1012 and C103F/C103M to PCM pin 64 at C185. Circuit 359 (GY/R) also links the sensor network to PCM pin 91.
Which circuit feeds the backup lamps from the TR sensor?: Circuit 140 (BK/PG), hot in Reverse, goes to the backup lamps on page 95-1.
What are the TR sensor input circuits and colors?: Circuit 33 W/PK from the starting system (hot in Start), 463 R/W from all-wheel drive, 298 P/O from power distribution (hot in Run), and 359 GY/R from the PCM/engine controls circuit.
Is any part of this circuit engine-specific?: Yes, one branch of circuit 359 GY/R to Heated Oxygen Sensor (HO2S) #12 is labeled '5.8L ONLY'.