Radio Interference

cosmarchy · December 22, 2019

Hi,

I get major interference on the radio when I switch on the rear window heater.

I gather this could be something wrong with either the electrics (some capacitor??) or the heater itself.

How do I go about diagnosing the fault without replacing the parts one at a time as this could get expensive!!

it is an 06 IS220d

Thanks

madasahatter · December 22, 2019

Happens to most i imagine. Terrible on my car, i listen to compact discs most of the time.

HellRider · December 22, 2019

Had the same issue on my avensis but not in lexus

Arqum · December 22, 2019

Have you got aftermarket tint film on the screen?

madasahatter · December 23, 2019

No i hate aftermarket tinted windows. Only happens when rear heated screen on.

NemesisUK · December 23, 2019

Poor or corroded connections to the screen heater?

Does the heater clear the screen evenly?

madasahatter · December 23, 2019

yes screen clears evenly all across.

Beamish · December 23, 2019

Check that the terminals on the Battery are perfectly clean and tight.

I recall having a similar problem and cured it by cleaning up the Battery connections.

Dec.

madasahatter · December 23, 2019

Battery is 6 moths old terminals are spotless i have o c d mate. My engine bay is cleaner than most cars exteriors.

Arqum · December 23, 2019

ive seen in the past on the IS as the radio aerial is in the screen that putting tinit on causes the metal in the film and the aerial wires to short, this more so when you switch the rear heater on

cosmarchy · December 23, 2019

No aftermarket film on windows. As far as I remember it clears evenly however quite slowly; i'll have to wait for the colder weather again and try it out.

I have a rummage around and see if I can find the terminals after Christmas...

JRG1 · January 25, 2020

Hello All.

I’m new to the Lexus Family having just purchased my first 2 weeks ago. Have read with interest this topic. I am experiencing interference when listening to the radio if I switch on the demister. I appear to have some elements not working predominantly on the near side. I had assumed the aerial would run on a separate line or lines across the screen and not the entire track but I really don’t know. So do you chaps think the answer is a replacement rear screen or is the a fault elsewhere.
Look forward to reading your thoughts.

Keep Smiling 😀

Hondaman · January 25, 2020

It's quite a common fault on various brands, as I've experienced it in my previous IS250, and a Honda Accord I once owned. A good wipe on the inside of the glass with some glass cleaner, always did the trick for me. Give it a try.

Ernie Moore · January 25, 2020

I removed the radio and sat nav display unit when i put it all back together I have no power in either unit what have I done wrong

is200 Newbie · January 25, 2020

9 hours ago, JRG1 said:

Hello All.

I’m new to the Lexus Family having just purchased my first 2 weeks ago. Have read with interest this topic. I am experiencing interference when listening to the radio if I switch on the demister. I appear to have some elements not working predominantly on the near side. I had assumed the aerial would run on a separate line or lines across the screen and not the entire track but I really don’t know. So do you chaps think the answer is a replacement rear screen or is the a fault elsewhere.
Look forward to reading your thoughts.

Keep Smiling 😀

As far as i believe, on the 250 at least (can see you have a GS but it is probably the same) The radio aerial is integrated into the heating element and i an sure it is the element that is the middle vertical one. You will probably find that the elements have dried up and flaking off the glass if the radio reception is going.

is200 Newbie · January 25, 2020

4 hours ago, Ernie Moore said:

I removed the radio and sat nav display unit when i put it all back together I have no power in either unit what have I done wrong

Got to ask, are you sure all the power leads are connected?

Texas · January 26, 2020

+1 on making sure a plug/loom has not been missed out as there are a lot of them! Especially if it falls Back into rear of dash space. Also the connection on the side of the unit has got the same plug configuration ( should not have been designed like it!) as one of the ones that go in the bottom row so check these have not been reversed.