Experiencing issues with your OBD2 port on a 1997 Buick Skylark can be frustrating, especially when you’re trying to diagnose car problems yourself. If you’re facing a situation where your OBD2 scanner isn’t communicating or seems to have no power in the OBD2 port of your 97 Buick Skylark, you might be looking for solutions. While a lack of power to the OBD2 port could stem from wiring or fuse issues, sometimes the problem might be related to your car’s computer system, the Powertrain Control Module (PCM).
One troubleshooting step, often discussed in online forums and among DIY mechanics, involves resetting the PCM’s adaptive memory. This procedure, sometimes referred to as a “PCM flash” or “ECM reset,” can clear stored data and potentially resolve communication glitches that might indirectly affect your OBD2 port’s functionality.
While it’s important to note that this method is not a guaranteed fix for a 97 Buick Skylark No Power In Obd2 Port issue, and it won’t solve underlying electrical problems like blown fuses or damaged wiring, it’s a relatively simple procedure you can try at home. This reset essentially forces the PCM to relearn engine parameters, which in some cases, might iron out software-related kinks that could be contributing to diagnostic communication problems.
The following steps outline a procedure, shared by a JEEP technician on a popular forum, to erase the adaptive memory in a PCM. Keep in mind that while this advice was given in the context of a Jeep, the general principle of PCM reset can often apply to various vehicles, including your 1997 Buick Skylark.
Steps to Potentially Reset Your 1997 Buick Skylark PCM Adaptive Memory:
Disclaimer: Perform these steps with caution and at your own risk. Disconnecting battery cables can reset other electronic systems in your vehicle, such as your radio presets. If you are uncomfortable performing these steps, consult a qualified automotive technician.
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Disconnect the POSITIVE battery terminal. Locate the positive terminal on your car battery (usually marked with a “+” sign and a red cable). Use a wrench to carefully disconnect the cable.
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Ground the Positive Cable. This is a crucial step to discharge capacitors in the PCM. Touch the disconnected POSITIVE battery cable to a ground point on your vehicle. Suitable ground points include the engine block or the air conditioning compressor pump. Ensure you are touching bare metal and NOT the negative battery terminal. Hold it there for approximately 30 seconds. This process drains any residual power and helps clear the PCM’s memory.
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Reconnect the Battery Cable. Reattach the positive battery cable securely to the positive battery terminal.
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Turn Ignition to “ON” (Do NOT Start Engine). Insert your key into the ignition and turn it to the “ON” position. Do not start the engine.
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Turn Headlights “ON”. Switch your headlights to the “ON” position.
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Turn Headlights “OFF”. Switch your headlights back to the “OFF” position.
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Turn Ignition Key “OFF”. Turn the ignition key back to the “OFF” position and remove the key.
According to the original source, these steps should erase the adaptive memory in your PCM and put it into a “Fast Learn Mode” when you next start your 1997 Buick Skylark. When you start the engine, the PCM will initially operate using pre-programmed factory settings. As you drive, it will begin to relearn and adapt to your engine’s specific characteristics over approximately 50 warm-up cycles.
Important Considerations and Next Steps:
- OBD2 Port Power is Key: If your OBD2 port truly has no power, meaning a scan tool receives no power when plugged in, this PCM reset procedure is unlikely to directly solve the issue. You should first check the OBD2 port fuse, typically located in your car’s fuse box. Consult your Buick Skylark owner’s manual for the fuse box location and fuse assignment. Also, inspect the wiring to the OBD2 port for any damage or loose connections.
- “Not Ready” Monitors: The original forum post mentions clearing “not ready” monitors for emissions testing. If your 97 Buick Skylark is failing an emissions test due to excessive “not ready” monitors, a PCM reset might help in some cases by forcing the system to reset and re-run the diagnostic tests. However, it’s crucial to address the underlying issues causing the monitors to be “not ready” in the first place.
- Professional Diagnostics: If you continue to experience OBD2 port problems or engine performance issues after attempting a PCM reset, it’s highly recommended to seek professional diagnostics from a qualified mechanic. They can use specialized tools to accurately diagnose electrical problems, PCM malfunctions, or other issues affecting your 97 Buick Skylark.
Resetting your PCM is a troubleshooting step worth considering if you are facing potential OBD2 communication problems or suspect your car’s computer might be acting up. However, for a definitive solution to a 97 Buick Skylark no power in OBD2 port situation, a thorough electrical system check is essential.
