Experiencing shifting issues with your 2009 Ford Edge? You might be facing a P1702 trouble code, indicating a problem with your Transmission Range (TR) Sensor circuit. When diagnosed using an OBD2 scanner on your 09 Ford Edge, the P1702 code can point to specific transmission malfunctions that limit your vehicle’s performance. This article, based on the 2009 Edge Workshop Manual, will guide you through understanding, diagnosing, and potentially resolving this issue.
According to the Powertrain Diagnostic Trouble Code (DTC) chart for the 2009 Ford Edge, a P1702 code signals a “Transmission Range Sensor circuit failure.” This failure can severely impact your vehicle’s transmission, often restricting operation to Park, Neutral, Reverse, and only 5th Gear. You may also notice harsh gear engagements when this code is present.
The Transmission Range Sensor is a crucial component located inside the transmission. It plays a vital role in communicating the gear selector lever position to the Powertrain Control Module (PCM). This communication is essential for the PCM to properly manage transmission operations. The diagram below illustrates how the TR Sensor integrates with the PCM within the 2009 Ford Edge’s electrical system.
Diagnosing the P1702 Code on Your 2009 Ford Edge
Diagnosing the P1702 error effectively involves a systematic approach, starting with external checks before considering internal transmission components. A helpful guide for this process is derived from the Workshop Manual’s Transmission Range Sensor Pinpoint Test D diagnostic procedure, along with advice from experienced technicians. Here’s a step-by-step breakdown:
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Gear Selector Cable Adjustment: Begin by checking and adjusting the Gear Selector Cable. Misalignment here can sometimes trigger sensor errors. Refer to the Workshop Manual documents provided below for detailed instructions on Gear Selector Cable Adjustment for both 2009 and 2014 Ford Edge models, as the procedures may have slight variations.
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External Electrical Connectors Inspection: Thoroughly inspect all relevant external electrical connectors. Look for signs of corrosion, damage, or loose connections. Ensure that connectors are properly seated and secure. Focus on the connectors associated with the Transmission Range Sensor and the PCM.
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OBDII Data Link Scan Tool Monitoring: Utilize an OBDII scan tool to monitor Transmission Range Sensor PIDs (Parameter Identification Data). This allows you to evaluate the TR Sensor’s operation and its communication with the PCM in real-time. Observe the data stream for any inconsistencies or erratic readings as you shift through the gears. An OBD2 scanner compatible with 2009 Ford Edge models is essential for this step.
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PCM-TR Sensor Wiring Harness Check: Inspect the wiring harness that connects the PCM to the TR Sensor. Use a multimeter to test for:
- Open Circuits: Identify any breaks in the wiring that could interrupt the signal.
- Shorted to Ground Circuits: Check for unintended electrical paths to ground.
- Shorted to Power Circuits: Look for shorts to power that could cause signal interference.
These external tests are crucial because they help rule out simpler, more accessible issues before proceeding to internal transmission diagnostics, which are significantly more involved.
Only if these external checks fail to identify the problem should you consider internal evaluation. This involves preparing and opening the transmission’s Main Cover to directly access and inspect the TR Sensor and its connector.
Repairing the P1702 Fault: TR Sensor Replacement
If, after completing all external diagnostic steps, the issue persists, the Transmission Range Sensor itself may be faulty and require replacement. Direct internal testing of the TR Sensor, as detailed in the TR Sensor Removal and Installation document from the Workshop Manual, will confirm this.
Should the TR Sensor fail internal testing, a replacement part is available through Ford’s official parts website.
Ford Parts Online – Transmission Range Sensor Replacement Part
Replacing the TR sensor involves accessing the sensor within the transmission, which is a complex procedure. It is essential to consult the Workshop Manual for detailed removal and installation instructions to ensure proper procedure and avoid further complications.
Document Downloads for 2009 Ford Edge P1702 Diagnosis
For detailed diagnostic and repair procedures, refer to these official documents from the 2009 Edge Workshop Manual:
- 6F50 Transmission, 3.5L Duratec – Electronic Controls Wiring Diagram – 2009 Edge Workshop Manual.pdf
- Transmission Range Sensor – Pinpoint Test D – 2009 Edge Workshop Manual.pdf
- 6F50 Transmission – Selector Lever Cable Adjustment – 2009 Edge Workshop Manual.pdf
- 6F50-6F55 Transmission – Selector Lever Cable Adjustment – 2014 Edge Workshop Manual.pdf
- 6F50 Transmission, 3.5L Duratec – Electronic Controls Connector C168 Details – 2009 Edge Workshop Manual.pdf
- 6F50 Transmission, 3.5L Duratec – Electronic Controls Connector C168 Location – 2009 Edge Workshop Manual.pdf
- POWERTRAIN CONTROL MODULE (PCM) – Connector C175T Details – 2009 Edge.pdf
- POWERTRAIN CONTROL MODULE (PCM) – Connector C175T Location – 2009 Edge.pdf
- Powertrain Control Module (PCM) – For Firewall Location Illustration – 2009 Edge Workshop Manual.pdf
- Transmission Range (TR) Sensor – Removal and Installation – 2009 Edge Workshop Manual.pdf
Understanding the Transmission Range (TR) Sensor Connector is also crucial for accurate diagnosis and repair. The following diagrams provide detailed pinout information for the TR Sensor connector and its integration within the solenoid body:
SensorConnectorIllustration.jpg.96b58f77e8ff8d878e2d767ef931dfef.jpg)
| Pin Number | Circuit Function |
|---|---|
| 1 | Transmission Range (TR) Ground |
| 2 | TR 4 |
| 3 | TR 3 |
| 4 | TR 2 |
| 5 | TR 1 |
| 6 | Empty |
SensorInternalCircuitDiagramConnectorsIllustration.jpg.b3d574293ba0fffad81b1c4d6c7992ea.jpg)
| Solenoid Body Main Connector Pin Number | TR Sensor Pin Number | Circuit Function |
|---|---|---|
| 4 | 5 | Transmission Range (TR) 1 |
| 5 | 4 | TR 2 |
| 6 | 3 | TR 3 |
| 7 | 2 | TR 4 |
| 8 | 1 | TR Ground |
| — | 6 | Empty |
Conclusion
Dealing with a P1702 code on your 2009 Ford Edge can be concerning, but by following a systematic diagnostic approach, you can pinpoint the issue. Start with external checks and utilize your OBD2 scanner to gather data. Remember to consult the provided Workshop Manual documents for detailed procedures. If the problem lies within the TR Sensor itself, replacement may be necessary. Consider seeking professional assistance from a qualified mechanic if you are not comfortable performing these diagnostic and repair steps yourself.
Good luck!
