20 Most Recent JVC KD-G421 CD Player - Page 2 Questions & Answers

i have the exact same problem!!! need help. wont select the input channel, i have radio and cd??? wheres the mp3

JVC KD-G421 CD... • Answered on Oct 11, 2009

If your autochanger has an input as well as an output connector it will be possible. The iPod adapter would have to be plugged into the changer's input, and the changer's output cable would run to the KD-G421.

This manual here from JVC shows a diagram on the middle of page 1 where an i-Pod adapter (I'm assuming you have the KS-PD100) is connected daisy-chained with an XM tuner or a DLP unit. Although it doesn't explicitly say that it would work with a CD changer, I don't think it'll be a problem as long as you have an input on the changer.

JVC KD-G421 CD... • Answered on Aug 07, 2009

if you having that problem more than once change the head unit to a different brand some of those unit use by kia all ways do that i have change a few for some customer my self '' get one of the poineer o9 model unit and get properly in stall

JVC KD-G421 CD... • Answered on Aug 07, 2009

Read the Manual on Page 2 or get it from:

Just make a reset with a pen or something else.
This should solve the problem.

Best regards


JVC KD-G421 CD... • Answered on Mar 28, 2009

To stop the memory loss you need to swap the red and yellow wires around. (battery power and ignition power).

To stop the date loss, you need to cut the electrical ariel/remote blue wire.

JVC KD-G421 CD... • Answered on Feb 29, 2008

Here you go mate. http://www.online-caraudio.co.uk/ishop/1126/shopscr564.html

£75.00 gets you a new face!


JVC KD-G421 CD... • Answered on Feb 22, 2008

If it is a factory code, it is recognised with a JVC car radio service centre by the serial number.

JVC Car Audio &... • Answered on Apr 20, 2021

1. Defective display 2. Defective display controller

JVC Car Audio &... • Answered on Mar 23, 2021

Contact JVC to inquire.

JVC Car Audio &... • Answered on Mar 23, 2021

Your CD changer is cycling, possibly because of a stuck disc or mechanical failure.

JVC Car Audio &... • Answered on Mar 23, 2021

Press the "Hour" button (or right arrow button) to set the first and second digits of the code. Release the button once the four-digit code is accurately displayed. Press the "Mode" button to lock in the code you set. Turn the stereo deck on by pressing the "Source" or "Power" button to complete the reset.

JVC Car Audio &... • Answered on Mar 17, 2021

It is too cold for it to work properly. Check the operating temperature range in your user manual.

JVC Car Audio &... • Answered on Dec 21, 2020

Not sure if this will help any other owners since my answer is 4 years late, but this is what I found from another user. Apparently if you mess with the wiring too often, it goes in a safe mode which you need to do some button trickery to unlock the device from it's safe mode. These are the Steps. 1.Disconnect power supply 2.Press [MENU] and [UP arrow] buttons and keep holding. 3. While holding the buttons [MENU] / [UP arrow], connect the power plug again A. The display will show "DC ERR" *** if it still shows "Chk wiring ..." repeat the steps above until you get "DC ERR." 4. Press [UP arrow]; the display shows "DC1 ERR" a. Press and hold [UP arrow] and it will show "DC1 OK" 5. Press [Down arrow], the screen will show "DC2" a. Press and hold [DOWN arrow] and the display will show "DC2 0" 6. Disconnect the power from the back of the unit. 7. Remove the Face Unit. 8. Reconnect the power from the back. 9. Use a sharp object and press the [RESET] hole for 3 seconds and release. 10. Reinstall the face unit and turn on the power.

JVC Car Audio &... • Answered on Dec 04, 2020

It can be due to the lens of the player, or it can't take the command properly.

JVC Car Audio &... • Answered on Jun 03, 2020

It is due to the bad connection to the battery or your battery can be weak and also check all the connections sometimes loose connections can cause sound, a weird sound.

JVC Car Audio &... • Answered on May 30, 2020


JVC Car Audio &... • Answered on May 21, 2020

Not finding what you are looking for?
JVC KD-G421 CD Player Logo

Popular Tags

31 questions posted

Ask a Question

Usually answered in minutes!

Top JVC Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

5023 Answers

The Knight
The Knight

Level 3 Expert

76584 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1189 Answers

Are you a JVC Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

JVC Car Audio & Video

  • JVC Car Audio & Video

Most Popular Question

unable set clock jvc kd g421

  • Car Audio & Video