JapCarForum Car Manufacturers Lexus/Toyota IS200 / IS300 / SPORTCROSS / Altezza Rear Demister

Rear Demister

Rear Demister

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JeffMcC
Member
186
01-09-2016, 10:22 AM
#1
Having problems with my demister. Checked the fuses(ok) heated mirrors work when turned on. My IS is a 1999 (T)
JeffMcC
01-09-2016, 10:22 AM #1

Having problems with my demister. Checked the fuses(ok) heated mirrors work when turned on. My IS is a 1999 (T)

Andy-R.
Posting Freak
1,889
01-09-2016, 10:26 AM
#2
Could be the switch on the a/c controls, have you played about with anything recently.

40mm Lowering Springs, Re-sprayed Front, 6000K HID's, Re-furbed alloys, Bandit Induction Kit (cheers Chris), Raised boot spoiler with LED, Blue calipers with silver decals, De-badged rear, Chrome Oil Filler Cap (thanks to Chris again), White LED dash bulbs, Blue a/c control bulbs, Blue door markers and interior lights, Sony head unit, Chrome Lexus tax disc holder, TRD side skirts, Original Saloon Front Bumper re-fitted instead of Sportcross

[Image: Lf9Nl.jpg]
Andy-R.
01-09-2016, 10:26 AM #2

Could be the switch on the a/c controls, have you played about with anything recently.


40mm Lowering Springs, Re-sprayed Front, 6000K HID's, Re-furbed alloys, Bandit Induction Kit (cheers Chris), Raised boot spoiler with LED, Blue calipers with silver decals, De-badged rear, Chrome Oil Filler Cap (thanks to Chris again), White LED dash bulbs, Blue a/c control bulbs, Blue door markers and interior lights, Sony head unit, Chrome Lexus tax disc holder, TRD side skirts, Original Saloon Front Bumper re-fitted instead of Sportcross

[Image: Lf9Nl.jpg]

steviewevie
Posting Freak
7,993
01-09-2016, 10:36 AM
#3
What sort of problems ? Do you mean it never comes on, or it's intermittent, or something else ?

[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
01-09-2016, 10:36 AM #3

What sort of problems ? Do you mean it never comes on, or it's intermittent, or something else ?


[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !

steviewevie
Posting Freak
7,993
01-09-2016, 10:40 AM
#4
The heated mirrors have a separate fuse to the heated rear screen, by the way.

[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
01-09-2016, 10:40 AM #4

The heated mirrors have a separate fuse to the heated rear screen, by the way.


[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !

JeffMcC
Member
186
02-09-2016, 09:14 AM
#5
thanks for the replies guys. stevie, no it never comes on. Im led to believe that on my car the rear dimister and the mirrors work at the same time. As for fuses I've checked under the bonnet and both inside fuse boxes.
JeffMcC
02-09-2016, 09:14 AM #5

thanks for the replies guys. stevie, no it never comes on. Im led to believe that on my car the rear dimister and the mirrors work at the same time. As for fuses I've checked under the bonnet and both inside fuse boxes.

steviewevie
Posting Freak
7,993
02-09-2016, 11:07 PM
#6
On your age of car Jeff (mine is a V reg, so mine is the same), the mirror heaters are on all the time, and the rear demister only comes on when you press the button. On later cars they changed it so that the mirror heaters only come on when you press the demister button.

The fuse for the rear demister is a 30A fuse at the top of the driver's side footwell fuse box. There are separate fuses for the door mirror heaters. Hopefully it's just that fuse. If not, then it might be something to do with the switch.

I seem to remember you saying the stereo has ERR3 on it. I wonder if someone has had the stereo out to have a look at it, because that also requires taking out the A/C control unit and disconnecting that, so there's a chance it's not quite connected up properly ?

[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
02-09-2016, 11:07 PM #6

On your age of car Jeff (mine is a V reg, so mine is the same), the mirror heaters are on all the time, and the rear demister only comes on when you press the button. On later cars they changed it so that the mirror heaters only come on when you press the demister button.

The fuse for the rear demister is a 30A fuse at the top of the driver's side footwell fuse box. There are separate fuses for the door mirror heaters. Hopefully it's just that fuse. If not, then it might be something to do with the switch.

I seem to remember you saying the stereo has ERR3 on it. I wonder if someone has had the stereo out to have a look at it, because that also requires taking out the A/C control unit and disconnecting that, so there's a chance it's not quite connected up properly ?


[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !

Andy-R.
Posting Freak
1,889
03-09-2016, 01:19 AM
#7
Good call Stevie, check the fuse again if it's not then is it just the demister that's not working does the a/c and blowers and stuff work ok? inside the a/c unit behind the switch there these little stork type things so when you press the switch they push against the switch inside the unit to tell it to come on if someones had the a/c unit out to look at the stereo then the stork thingy may have moved or dropped or something, if your going to take your a/c apart tho mate do it very very carefully the clock displays are really sensative and brake if your too heavy handed, I l know from experience :crying:

40mm Lowering Springs, Re-sprayed Front, 6000K HID's, Re-furbed alloys, Bandit Induction Kit (cheers Chris), Raised boot spoiler with LED, Blue calipers with silver decals, De-badged rear, Chrome Oil Filler Cap (thanks to Chris again), White LED dash bulbs, Blue a/c control bulbs, Blue door markers and interior lights, Sony head unit, Chrome Lexus tax disc holder, TRD side skirts, Original Saloon Front Bumper re-fitted instead of Sportcross

[Image: Lf9Nl.jpg]
Andy-R.
03-09-2016, 01:19 AM #7

Good call Stevie, check the fuse again if it's not then is it just the demister that's not working does the a/c and blowers and stuff work ok? inside the a/c unit behind the switch there these little stork type things so when you press the switch they push against the switch inside the unit to tell it to come on if someones had the a/c unit out to look at the stereo then the stork thingy may have moved or dropped or something, if your going to take your a/c apart tho mate do it very very carefully the clock displays are really sensative and brake if your too heavy handed, I l know from experience :crying:


40mm Lowering Springs, Re-sprayed Front, 6000K HID's, Re-furbed alloys, Bandit Induction Kit (cheers Chris), Raised boot spoiler with LED, Blue calipers with silver decals, De-badged rear, Chrome Oil Filler Cap (thanks to Chris again), White LED dash bulbs, Blue a/c control bulbs, Blue door markers and interior lights, Sony head unit, Chrome Lexus tax disc holder, TRD side skirts, Original Saloon Front Bumper re-fitted instead of Sportcross

[Image: Lf9Nl.jpg]

Lexusboy
Posting Freak
9,267
03-09-2016, 01:29 AM
#8
Can you not check using a multi metre on the rear screen to see if the screen is working and work your way back to the switch?
Lexusboy
03-09-2016, 01:29 AM #8

Can you not check using a multi metre on the rear screen to see if the screen is working and work your way back to the switch?

JeffMcC
Member
186
03-09-2016, 01:45 PM
#9
Thanks guys. Andy, yes the a/c still works but will pull it out again to check everythink is in order. Stevie, thanks for letting me know what Ampage im looking for, i did look at the panel but it didnt say anythink about the mirrors or rear dimister. Will check all and let all know how it went. Again Thanks guys. :thumbup1:
JeffMcC
03-09-2016, 01:45 PM #9

Thanks guys. Andy, yes the a/c still works but will pull it out again to check everythink is in order. Stevie, thanks for letting me know what Ampage im looking for, i did look at the panel but it didnt say anythink about the mirrors or rear dimister. Will check all and let all know how it went. Again Thanks guys. :thumbup1:

steviewevie
Posting Freak
7,993
03-09-2016, 10:10 PM
#10
There's a pic of the driver's side footwell fusebox here. The demister fuse is right at the top, I actually missed it when I originally looked at this diagram and couldn't spot it, partly due to the way it's labelled ("30A RR DEF").

[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !
steviewevie
03-09-2016, 10:10 PM #10

There's a pic of the driver's side footwell fusebox here. The demister fuse is right at the top, I actually missed it when I originally looked at this diagram and couldn't spot it, partly due to the way it's labelled ("30A RR DEF").


[Image: Sig-enginebay.jpg]
IS200 Turbo project now just about complete ! See my thread here and leave your comments.
Now running standalone Syvecs ECU and no stock ECU !

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