You disconnect the battery on a 2002–2003 Acura RSX, finish whatever repair you were doing, reconnect everything, and suddenly the driver’s window still moves—but the AUTO function no longer works.

That does not necessarily mean the window motor, switch, or regulator has failed.

According to the factory service manual, the power window control unit must be reset after certain electrical procedures, including disconnecting the battery. Honda provides a specific relearn sequence for restoring the driver’s automatic window operation.

The reset is simple:

Ignition ON → window fully down → hold DOWN for 2 seconds → window fully up → hold UP for 2 seconds.

If AUTO operation still does not work, Honda says to repeat the procedure.

That is considerably cheaper than ordering a window regulator because the car forgot where the glass was.

When Does the RSX Power Window Need to Be Reset?

Honda specifically lists three situations that require resetting the power window control unit:

• Disconnecting the battery
• Removing the No. 8 7.5-amp fuse and/or No. 23 20-amp fuse from the under-dash fuse/relay box
• Disconnecting the driver’s door wire harness

These conditions are listed directly in the 2002–2003 RSX service procedure.

That means a lost AUTO function immediately after battery work is not necessarily a new electrical failure.

It may simply mean the control unit needs to relearn the window’s operating limits.

How Do You Reset the AUTO Window on a 2002–2003 Acura RSX?

Honda’s factory procedure is short, but the order matters.

1. Turn the ignition switch ON

Turn the ignition switch to the ON (II) position.

The engine does not need to be the focus of this procedure; the important point is that the ignition system is powered so the window control system can operate.

2. Lower the driver’s window completely

Use the driver’s window switch to move the glass all the way down.

When the window reaches the bottom, continue holding the switch in the DOWN position for two seconds.

Don’t release the switch the instant the glass stops.

That two-second hold is part of the reset.

3. Raise the driver’s window completely

Next, use the driver’s switch to move the window all the way up.

Once the glass reaches the top, continue holding the switch in the UP position for two seconds.

Again, the extra hold is intentional.

4. Test the AUTO function

After completing the sequence, test the automatic window operation.

Honda states that if the window still does not operate in AUTO, repeat the reset procedure.

Quick RSX Power Window Reset

For anyone standing in the driveway with the door open and their phone in one hand:

Ignition ON

↓

Window fully DOWN

↓

Hold DOWN 2 seconds

↓

Window fully UP

↓

Hold UP 2 seconds

↓

Test AUTO operation

That’s the factory sequence.

Why Does Disconnecting the Battery Affect the AUTO Window?

The factory manual establishes that disconnecting the battery is one of the conditions requiring a power-window control-unit reset.

In practical terms, the AUTO system relies on learned window operation that can be lost when power to the control unit is interrupted.

The important diagnostic distinction is this:

If the window still moves normally when you manually hold the switch but the one-touch AUTO feature disappeared immediately after battery disconnection, perform the factory reset before diagnosing hardware.

The manual does not say that every nonworking window is caused by lost initialization.

It says that the control unit requires resetting after the listed electrical interruptions.

That’s an important difference.

Does Pulling a Fuse Also Require the Window Reset?

Yes.

Honda specifically identifies the following under-dash fuses:

No. 8 — 7.5A

and/or

No. 23 — 20A

Removing either as part of service can require the power window control unit to be reset.

So an AUTO-window problem can appear even if the battery itself was never disconnected.

That is worth remembering when troubleshooting electrical repairs.

You may have fixed one circuit and accidentally convinced the window that it has never met the top of the door before.

Does Disconnecting the Driver’s Door Harness Require a Reset?

Yes.

Honda also specifies disconnecting the driver’s door wire harness as a condition requiring the reset procedure.

That can become relevant after repairs involving the:

driver’s door,

window regulator,

window motor,

door wiring,

speaker installation,

door lock components,

or other work requiring the door harness to be unplugged.

The manual does not state that all of those repairs automatically cause the problem, but disconnecting the driver’s door harness itself is explicitly listed as a reset trigger.

What If the Window Works but AUTO Does Not?

That is exactly the kind of situation where performing the reset first makes sense—especially when the AUTO function stopped immediately after one of Honda’s listed reset conditions.

The service manual’s final instruction is straightforward:

If the window does not work in AUTO after completing the sequence, repeat the procedure.

If repeated initialization does not restore the function, then the problem has moved beyond the simple reset covered by this procedure and additional diagnosis is appropriate.

Don’t keep performing the same four steps 37 times and expect the car to eventually respect your persistence.

What If the Window Does Not Move at All?

A completely inoperative window is different from an AUTO function that merely needs to be reinitialized.

The reset requires you to move the driver’s window fully down and then fully up.

If the window cannot move through those positions, you cannot properly complete the procedure described in the manual.

In that case, the underlying electrical or mechanical problem needs to be diagnosed first.

Possible systems involved may include the switch, motor, wiring, fuse circuit, regulator, or related components, but the reset procedure itself does not establish which one has failed.

Should You Replace the Window Motor Before Trying the Reset?

Not when the primary symptom is a lost AUTO function immediately following one of Honda’s specified reset conditions.

The factory procedure gives you a no-parts-required first step.

If the driver’s window operates manually and you recently:

disconnected the battery,

pulled the relevant under-dash fuse,

or disconnected the driver’s door harness,

run the initialization procedure first.

Parts replacement should follow diagnosis, not precede it.

That principle saves a surprising amount of money on old cars.

Does the RSX Need This Reset After Battery Replacement?

Because replacing the battery normally involves disconnecting the battery, the service manual’s reset requirement applies to the electrical interruption involved in that process.

Honda explicitly lists disconnecting the battery as a trigger for resetting the power-window control unit.

So if your AUTO window function disappears immediately after installing a battery, this procedure should be near the top of the checklist.

Does the Procedure Apply After Electrical Repairs?

It applies when the repair includes one of the conditions Honda identifies.

Most notably:

battery disconnection,

removal of the specified power-window-related fuses,

or disconnection of the driver’s door harness.

That makes this reset particularly useful to know before working on an older RSX.

A technician can finish an unrelated repair successfully and still hand the vehicle back with a driver complaining that the automatic window mysteriously stopped working.

Sometimes nothing broke.

Something simply needs to be initialized again.

Final Answer

If the driver’s AUTO window stops working on a 2002–2003 Acura RSX after the battery has been disconnected, Honda specifies resetting the power-window control unit.

Turn the ignition ON (II), lower the driver’s window completely and hold the switch DOWN for two seconds. Then raise the window completely and hold the switch UP for two seconds.

Test AUTO operation afterward.

If AUTO still does not function, Honda says to repeat the procedure.

The reset is also required after removing the specified No. 8 or No. 23 under-dash fuses or disconnecting the driver’s door wire harness.

Before replacing expensive window hardware, give the car its two seconds down and two seconds up.

Sometimes that’s literally what Honda prescribed.