1998-2000 Lexus GS300 & GS400 CD Changer: Solving 'ERR' Messages and Nakamichi System Failures

Critical Compatibility Information

Symptoms of a Failing CD Changer

When the glove box CD changer begins to fail, you will notice several distinct symptoms, most of which are related to the mechanical operation of the unit.

• "ERR" Message on Radio Display: This is the most common sign of failure. The radio display will show an "ERR" or "ERR3" message when you try to play a CD. This indicates a mechanical fault inside the changer, such as a jammed disc or a failed loading mechanism.
• CDs Will Not Load or Eject: You may find that the CD magazine is stuck and will not eject when you press the button. In other cases, the unit may eject the magazine but fail to pull a disc from it to play, or it may not accept a disc you're trying to load.
• Skipping or Poor Audio Quality: If the laser lens is dirty or failing, the CD may skip, play with static, or not read at all, even with clean, unscratched discs.
• Unit Cycles but Doesn't Play: You might hear the changer making mechanical noises as it tries to cycle through the discs, but it never successfully loads one to play. The radio display may just show the disc number without ever starting playback.
• No Response: In some cases, the unit may be completely unresponsive, with the head unit not recognizing that a CD changer is connected at all.

Diagnosing the Issue

Before replacing the changer, try these simple diagnostic steps:

1. Try Different CDs: These changers can be sensitive to burned CDs (CD-R) or discs with paper labels. Test the unit with several different store-bought, professionally pressed audio CDs to rule out a disc-related issue.
2. Perform a System Reset: Disconnecting the car's battery for several minutes can act as a hard reset for the audio system. This can sometimes clear an electronic glitch and restore the changer's function, although it is often a temporary fix for a mechanical problem.
3. Check Fuses: While less common, a blown fuse for the audio system could cause the unit to lose power. Check the fuse panels in the driver and passenger footwells.

Buying a Used 1998-2000 GS Nakamichi CD Changer

Since new OEM units are no longer available or are prohibitively expensive, buying a quality used part is the most practical solution. Here’s what to look for.

How to Verify Compatibility

• Confirm Your System: First and foremost, ensure your GS300 or GS400 has the Nakamichi head unit. Look for the name on the dash unit.
• Match Part Numbers: Look for OEM part numbers 86120-3A620, 86120-3A621, 86120-3A622, or 86270-30160. The part number is printed on a sticker on the changer's metal case.
• Check the Connectors: The Nakamichi-specific changer uses a unique digital audio connection in addition to the main power/data plug. While difficult to see without removing the part, be wary of sellers listing a "Pioneer" changer as compatible.

What to Inspect on a Used Unit

When buying a used changer, ask the seller if it has been tested. Physically inspect the unit for any signs of damage, especially to the front loading slot and the connectors on the back. If possible, test the eject mechanism to ensure the cartridge slot opens smoothly. Given the age of these parts, failure is common, so purchasing from a reputable seller with a warranty is highly recommended.

Replacement Guide (DIY Feasible)

Replacing the CD changer is a straightforward job that most DIY mechanics can complete in under an hour. It is located inside the glove box.

Tools Needed:

• 10mm socket with ratchet and extension
• Phillips head screwdriver
• Flat head screwdriver or trim removal tool

Step-by-Step Instructions:

1. Disconnect the Battery: As a safety precaution, disconnect the negative terminal of the car battery.
2. Empty the Glove Box: Remove all contents from the glove box.
3. Remove the Glove Box Assembly: Open the glove box. Remove the Phillips head screws along the top edge. Then, remove the 10mm bolts from the underside of the dash that secure the glove box assembly.
4. Lower the Assembly: Gently pull the glove box assembly down and toward you. Be careful, as the glove box light will be connected. Unplug the connector for the light to free the assembly completely.
5. Unbolt the CD Changer: The CD changer is mounted in a bracket behind where the glove box was. It is held in place by a few 10mm bolts or nuts. Remove these fasteners.
6. Disconnect the Wiring: Slide the changer out and disconnect the single wiring harness plugged into the back.
7. Installation: Installation is the reverse of removal. Plug in the new changer, bolt it into place, reconnect the glove box light, and reinstall the glove box assembly. Reconnect the battery and test the system.

Programming and Security

The glove box CD changer is a simple plug-and-play component. No programming, flashing, or anti-theft code is required when replacing the changer. The vehicle's security system is tied to the main head unit, not the external changer.

Cost Comparison

OEM Part Numbers

These part numbers apply to the 6-disc glove box changer for the Nakamichi system in the 1998-2000 GS300 and GS400. Always match your part number before purchasing.

• 86120-3A620
• 86120-3A621
• 86120-3A622
• 86270-30160

Recalls and Technical Service Bulletins (TSBs)

As of this writing, there are no specific safety recalls or Technical Service Bulletins (TSBs) issued by Lexus or the NHTSA for the CD changer in the 1998-2000 Lexus GS300 and GS400. Any failures are due to age and wear of the mechanical components.

Frequently Asked Questions (FAQ)