1. Identify the Problem:
* Door won't open or close: Is it completely unresponsive, or does it make unusual noises (grinding, clicking)?
* Door opens/closes erratically: Does it stop halfway, open too fast/slow, or reverse unexpectedly?
* Remote control doesn't work: Do the buttons on the key fob work for the other functions (like locking/unlocking)?
2. Troubleshooting Steps:
* Check the fuses: Consult your owner's manual to locate and check the fuses related to the power sliding door. A blown fuse is a common and easy fix. Replace any blown fuses with the correct amperage.
* Check the power door motor: This requires some mechanical skill. You might need to access the motor (usually located in the sliding door itself) and check for any obvious damage or obstructions. This often involves removing the interior door panel. *Be careful not to damage any wiring during this process.*
* Inspect the door tracks: Dirt, debris, or ice in the tracks can prevent smooth operation. Clean the tracks thoroughly. Lubricate the tracks with a silicone-based lubricant (not WD-40).
* Test the switches: Try all the switches – the ones on the driver's side door, the passenger-side door, and the key fob. If only one switch isn't working, the problem is likely isolated to that switch.
* Check the limit switches: These switches tell the motor when to stop. If they're malfunctioning, the door might not open or close fully or might stop unexpectedly. This usually requires a more in-depth examination of the door mechanism.
* Battery voltage: A weak battery can cause intermittent problems with power accessories. Check your battery voltage.
3. If the Problem Persists:
If you've checked these things and the door still isn't working correctly, the problem is likely more serious:
* Faulty motor: This will require replacement.
* Wiring harness damage: A damaged or frayed wire in the harness connecting the motor to the control unit can cause intermittent or complete failure. This usually requires professional repair.
* Faulty control unit: This is the "brain" of the power door system. Replacement is often necessary and usually done by a professional.
Important Considerations:
* Safety First: Disconnect the battery's negative terminal before working on any electrical components in the door.
* Repair Manual: A repair manual specific to your 1999 Honda Odyssey will be invaluable. It will show you diagrams of the wiring, location of components, and detailed instructions.
* Professional Help: If you're not comfortable working on car electrical systems or mechanics, it's best to take your Odyssey to a qualified mechanic.
Remember, there's no "reset" button. The solution involves identifying and fixing the underlying cause of the malfunction. Start with the simpler steps and progressively move to more complex troubleshooting if necessary.
