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CEM and interior lights

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40

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gilhuly
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CEM and interior lights

Post by gilhuly » Fri Apr 12, 2019 9:51 am

I am a relative noob to this volvo platform (s40,V40) compared to 850/70 series. My question is, Is the interior lighting controlled by the Central Electronic Module? My problem is that all interior lights are on ALL the time. Any assistance or insight is greatly appreciated.


1998 V70 GLT, 15G swap
Fairfield, CT

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RickHaleParker
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Re: CEM and interior lights

Post by RickHaleParker » Fri Apr 12, 2019 9:59 am

There are two generations of the S40/V40.
Platform X40: 1995–2004 (1st generation) aka Nedcar.
Platform P1: 2004 –2012 (2nd generation)


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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gilhuly
Posts: 295
Joined: Fri Sep 18, 2009 6:20 pm
Year and Model: 98 V70 GLT
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Re: CEM and interior lights

Post by gilhuly » Fri Apr 12, 2019 10:22 am

Yes, I'm aware. I'm posting in the 2000-2004 forum. I have an 04 V40 for the record. Again, thanks in advance .


1998 V70 GLT, 15G swap
Fairfield, CT

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RickHaleParker
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Re: CEM and interior lights

Post by RickHaleParker » Fri Apr 12, 2019 11:27 am

I not seeing any 2004 V40. In 2004 the "V40" was badged as a V50.
Then again I'm seeing indicators that Volvo produced both X40 S40/V40 and P1 S40/V50 in 2004.
But no X40 V40 sold in North America.

Anyway ... Interior lighting for 2004 S40/V50. (P1)
2019-04-12 (2).png
2019-04-12 (1).png


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

User avatar
gilhuly
Posts: 295
Joined: Fri Sep 18, 2009 6:20 pm
Year and Model: 98 V70 GLT
Location: Fairfield, CT
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gilhuly

Re: CEM and interior lights

Post by gilhuly » Fri Apr 12, 2019 12:41 pm

I stand corrected. Its an 03. I haven't had it long. Sorry. What does the attached pertain to. It doesn't look like the right one for this car.


1998 V70 GLT, 15G swap
Fairfield, CT

User avatar
RickHaleParker
Posts: 2762
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
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Re: CEM and interior lights

Post by RickHaleParker » Fri Apr 12, 2019 1:38 pm

gilhuly wrote:
Fri Apr 12, 2019 12:41 pm
I stand corrected. Its an 03. I haven't had it long. Sorry. What does the attached pertain to. It doesn't look like the right one for this car.
As stated that was the 2004 P1 S40/V50.

This is the 2003 X40 S40/V40. The file you want to get your hands on is Volvo TP3965202.
2019-04-12 (3).png


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

User avatar
gilhuly
Posts: 295
Joined: Fri Sep 18, 2009 6:20 pm
Year and Model: 98 V70 GLT
Location: Fairfield, CT
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gilhuly

Re: CEM and interior lights

Post by gilhuly » Fri Apr 12, 2019 7:19 pm

OK, so looking at the electrical schematic on Alldata, I believe my problem to be from a bad power door lock and alarm module. The signals from the door buttons that signal door open/closed feed into this module. I believe the module then controls the action of the cabin courtesy lights. I've seen examples of the lights going up and down variably as well, which would fit into my theory. The computer has lots of capability in terms of dimming etc. I'll get a computer and report back.


1998 V70 GLT, 15G swap
Fairfield, CT

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