Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA2003NSX V6-3.0L DOHCREPAIR AND DIAGNOSISWINDOWS AND GLASSHEATED GLASS ELEMENTDESCRIPTION AND OPERATION
2003 Acura NSX V6-3.0L DOHC
Heated Glass Element: Description and Operation
2003 Acura NSX V6-3.0L DOHCSECTION Description and Operation
How the Circuit Works
The rear window defogger heats the rear window to remove condensation and restore visibility.
Voltage is applied at all times through fuse 11 to the rear window defogger relay. With the ignition switch in ON (II), voltage is also applied through fuse 4 to the rear window defogger relay coil and the defogger ON indicator.
When you press the rear window defogger switch once, the defogger timer circuit in the integrated control unit grounds the rear window defogger relay coil and the defogger ON indicator. The switch is a momentary switch and will return to the out position when released. The defogger ON indicator light then comes on, and the rear window defogger relay contacts close, applying voltage to the defogger grid on the surface of the rear window. The grid heats the rear window to remove any condensation from the glass.
You can turn off the window defogger by pressing the switch a second time, or by cycling the ignition switch to LOCK (0). A timer in the integrated control unit will automatically turn the defogger off after 20 to 30 minutes (USA) or 40 minutes (Canada) of continuous operation.
The rear window defogger heats the rear window to remove condensation and restore visibility.
Voltage is applied at all times through fuse 11 to the rear window defogger relay. With the ignition switch in ON (II), voltage is also applied through fuse 4 to the rear window defogger relay coil and the defogger ON indicator.
When you press the rear window defogger switch once, the defogger timer circuit in the integrated control unit grounds the rear window defogger relay coil and the defogger ON indicator. The switch is a momentary switch and will return to the out position when released. The defogger ON indicator light then comes on, and the rear window defogger relay contacts close, applying voltage to the defogger grid on the surface of the rear window. The grid heats the rear window to remove any condensation from the glass.
You can turn off the window defogger by pressing the switch a second time, or by cycling the ignition switch to LOCK (0). A timer in the integrated control unit will automatically turn the defogger off after 20 to 30 minutes (USA) or 40 minutes (Canada) of continuous operation.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.