Experiencing issues connecting your OBD2 scanner to your Dodge Journey? It’s a common frustration when that check engine light pops on, and you’re unable to pull diagnostic codes. One user with a 2016 Journey encountered a perplexing situation, and while the year is slightly different, the troubleshooting steps for a 2015 model remain largely relevant. Let’s delve into the potential causes and solutions when your OBD2 scanner seems to have no power in your 2015 Dodge Journey.
It’s reported that when attempting to connect an Actron CP9575 scanner to a 2016 Journey, the vehicle wouldn’t switch to “Run” mode for the scanner to operate. Even when forcing the car into “Run” mode before plugging in the scanner, bizarre electrical issues arose, including wipers activating and dashboard error messages flashing. This points to a potential problem beyond just scanner compatibility.
Understanding the OBD2 Port and Power Issues
The OBD2 (On-Board Diagnostics II) port is designed to provide a standardized access point to your vehicle’s computer system. It’s not just for data; it also supplies power to the scanner. If you’re facing a “no power” situation, several factors could be at play:
- Blown Fuse: This is the most common culprit. The OBD2 port is typically protected by a fuse. If this fuse blows, the port loses power.
- Wiring Issues: Less frequently, there could be damage to the wiring leading to the OBD2 port. This could be due to corrosion, rodent damage, or accidental cuts.
- Faulty OBD2 Port: The port itself could be damaged or have corroded pins, preventing proper connection and power delivery.
- Vehicle Computer Problems: In rare cases, issues within the vehicle’s computer system (PCM or BCM) could affect power to the OBD2 port.
Diagnosing the “No Power” Issue
Here’s a step-by-step approach to diagnose why your OBD2 scanner isn’t getting power in your 2015 Journey:
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Check the Fuses: Locate the fuse box in your Dodge Journey (refer to your owner’s manual for the exact location, often under the hood or dashboard). Identify the fuse associated with the OBD2 port or auxiliary power outlets (they may share a fuse). Inspect the fuse for any signs of being blown (broken filament). Replace it with a fuse of the same amperage rating.
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Test with Another Scanner (if possible): If you have access to a different OBD2 scanner, try using it. This helps determine if the issue is with your scanner or the car. If another scanner also fails to power up, the problem is likely with your Journey.
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Inspect the OBD2 Port: Visually examine the OBD2 port for any bent or corroded pins. Ensure there’s no debris or obstruction inside the port.
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Use a Multimeter (Advanced): If you’re comfortable using a multimeter, you can test for power at the OBD2 port. You should find 12V between pin 16 (power) and pin 4 or 5 (ground). Note: Incorrect multimeter use can cause damage. If unsure, consult a professional.
Scanner Compatibility and Connection Procedure
While the Actron CP9575 is generally an OBD2 compliant scanner and should be compatible with a 2015 Dodge Journey, compatibility issues can sometimes arise.
- Verify Scanner Compatibility: Double-check the scanner’s manual or the manufacturer’s website to confirm OBD2 and CAN protocol compatibility with 2015 Dodge Journey models.
- Correct Connection Procedure:
- Turn the ignition to the “OFF” position.
- Locate the OBD2 port (usually under the dashboard on the driver’s side).
- Plug the scanner firmly into the OBD2 port.
- Turn the ignition to the “ON” or “RUN” position (without starting the engine).
- Power on the scanner and follow its prompts to connect and read codes.
Avoid plugging in the scanner after the car is already in “Run” mode, as this can sometimes cause electrical disturbances, as experienced by the user in the original post.
Addressing Strange Electrical Symptoms
The wipers activating and dashboard lights flashing when connecting the scanner are unusual symptoms. This could indicate:
- Electrical System Glitch: A temporary electrical anomaly triggered by the scanner connection attempt.
- Grounding Issue: A poor ground connection in the vehicle’s electrical system can cause erratic behavior.
- Potential CAN Bus Interference: Less likely with a standard OBD2 scanner, but in rare cases, a faulty scanner could interfere with the vehicle’s CAN (Controller Area Network) bus, leading to sensor and system malfunctions.
If these symptoms persist even after resolving the “no power” issue, a more in-depth electrical system diagnosis might be necessary.
Conclusion
Troubleshooting a “no power” OBD2 port on your 2015 Dodge Journey involves systematic checks, starting with the simplest solution – fuses. By following these diagnostic steps, you can pinpoint the cause and hopefully get your scanner connected to read those trouble codes. If you’ve checked the fuses and basic connections and are still facing issues, it’s advisable to consult a qualified mechanic to investigate potential wiring or vehicle computer problems. Has anyone else experienced similar OBD2 port power issues on their Journey and found a solution? Sharing your experiences can be helpful!
