Sat Nav Help

[Arjinder]

Hello

So i got a second hand sat nav computer only £150 off eBay the dealers charge £3k bargain the computer and everything works woohoooo but my head unit has the ERR3 message on it before i got the computer i had a double din aftermarket headunit in just wondered how do i wire up the sat nav with a aftermarket HU?

I have the S model which does not have a amp...

Any help......

[Steviewevie]

You got the OEM satnav ? If your model didn't have satnav to start with, then you'll be missing all the wiring. What did you get, did you get the screen plus the CD/DVD part of the unit as well ? Sounds like it would be a pretty big job to me to wire all that up. I suspect you'd have been better off spending that money on a TomTom which would just plug in and work

[sparkystav]

It wont just work by plugging it in mate as Stevie said.

Your best to search P.Lindboms posts about how he removed the screen and replaced it with a sony touchscreen sat nav.

Stav

[Arjinder]

You got the OEM satnav ? If your model didn't have satnav to start with, then you'll be missing all the wiring. What did you get, did you get the screen plus the CD/DVD part of the unit as well ? Sounds like it would be a pretty big job to me to wire all that up. I suspect you'd have been better off spending that money on a TomTom which would just plug in and work

Hi. I already had oem sat nav fitted to the car factory fitted got all the wiring and everything, the problem was with the cd drive which is located in the boot it needed replacing. just wanted to know if there is a way of bypassing but can only find threads which detail how to do it if you have the amp which i do not.

[Arjinder]

It wont just work by plugging it in mate as Stevie said.

Your best to search P.Lindboms posts about how he removed the screen and replaced it with a sony touchscreen sat nav.

Stav

I already have the factory fitted sat nav installed in the car came out the factory like it the computer in the boot went, so i got another computer which works. the sat nav is powered through the HU but the HU has err 3 message so is no good, wanted to know how to run the sat nav through a aftermarket HU.

Just to say again my IS is already fitted with factory sat nav and all wiring done by lexus when it was made. sorry i didn't make this clear in the original post.

[Steviewevie]

Ah ok, I see. Hmm, sounds slightly unusual to have an S with satnav, I wonder if someone else has looked into how to get this to work with an aftermarket head unit ? Might be best to PM Fargo and ask him, since he knows all about how it works with the built-in amp solution.

[redz_UK]

i would guess that it works as normal with the hu being used to poll for the canbus system..

i would suggest builidng the bypass box here: info

for the sake of about £10 its worth a shot..

[Arjinder]

Ah ok, I see. Hmm, sounds slightly unusual to have an S with satnav, I wonder if someone else has looked into how to get this to work with an aftermarket head unit ? Might be best to PM Fargo and ask him, since he knows all about how it works with the built-in amp solution.

Thanks mate yeh must have been a extra when someone first brought it... but has a first stage remap to 180 well 176 from the dyno and its been lowwered on the TTE suspension sweeeet.... need a F1 defuser lol

[Arjinder]

i would guess that it works as normal with the hu being used to poll for the canbus system..

i would suggest builidng the bypass box here: info

for the sake of about £10 its worth a shot..

Thanks for your help mate gonna play around with everything on monday and hopeful a solution would come from it. was having a look at the wiring and im guessing its just a way of getting some power to the screen any way done a few ICE installs in the Lex so ill have a play around.

[redz_UK]

i would guess that it works as normal with the hu being used to poll for the canbus system..

i would suggest builidng the bypass box here: info

for the sake of about £10 its worth a shot..

Thanks for your help mate gonna play around with everything on monday and hopeful a solution would come from it. was having a look at the wiring and im guessing its just a way of getting some power to the screen any way done a few ICE installs in the Lex so ill have a play around.

??

do you have all of the loom running to the screen then?

if so you should have a loom on the stereo that requires the bypass on it..

[Arjinder]

i would guess that it works as normal with the hu being used to poll for the canbus system..

i would suggest builidng the bypass box here: info

for the sake of about £10 its worth a shot..

Thanks for your help mate gonna play around with everything on monday and hopeful a solution would come from it. was having a look at the wiring and im guessing its just a way of getting some power to the screen any way done a few ICE installs in the Lex so ill have a play around.

??

do you have all of the loom running to the screen then?

if so you should have a loom on the stereo that requires the bypass on it..

there are a total of 4 looms on the oem HU two of which are the power and speaker plugs (they are plugged into the aftermarket HU) and 2 are for the navi i guess. (one must be the power and the other must be for the voice guidance) the navi itself just has one loom a small clip at the back.

[Arjinder]

hello

I worked it out yesterday was quite simple actually. Basically in the SE and sport models which have the amp the OEM HU only has 2 connections on the back. With the S model there is no amp but there is a total of 4 connections on the OEM HU.

This must work like the amp does but in the HU. So to run the sat nav i had to dismantle the HU. taking out only the circuit and connections which was quite simple. take out the cassett and cd changer drive which left a unit the size of a single din and mounted it under the glove box.

Connected the sat nav connectors to what the connectors from the old HU and the other two connectors being the speakers and power to the aftermarket HU.

Everything works even voice guidance. instead of the drivers speaker being switched off constatly when the sat nav needs to speak it will turn the sound off from that speaker and speak then after will turn the sound back on again. :D

and even better news the person who hit my car claimed liability :D

[Asi]

hello

I worked it out yesterday was quite simple actually. Basically in the SE and sport models which have the amp the OEM HU only has 2 connections on the back. With the S model there is no amp but there is a total of 4 connections on the OEM HU.

This must work like the amp does but in the HU. So to run the sat nav i had to dismantle the HU. taking out only the circuit and connections which was quite simple. take out the cassett and cd changer drive which left a unit the size of a single din and mounted it under the glove box.

Connected the sat nav connectors to what the connectors from the old HU and the other two connectors being the speakers and power to the aftermarket HU.

Everything works even voice guidance. instead of the drivers speaker being switched off constatly when the sat nav needs to speak it will turn the sound off from that speaker and speak then after will turn the sound back on again. :D

and even better news the person who hit my car claimed liability :D

good news you got all of it sorted mate.