Security light comes on in tunnels

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Mar 22, 2010 | 08:38 PM

Firelizard

Thread Starter

Cruising

Joined: Nov 2009

Posts: 10

Likes: 0

Security light comes on in tunnels

So here's a strange one for you..

My C5 has the SECURITY light come on whenever I drive into tunnels, every time, without fail. It also throws a B2723 code in the BCM.

Any ideas on this one?

Mar 22, 2010 | 09:57 PM

ALLEGRO

Le Mans Master

Joined: Feb 2003

Posts: 6,683

Likes: 144

From: Memphis Tennessee

Afraid of the dark?

Couldn't resist....... TTT

Mar 22, 2010 | 09:59 PM

Firelizard

Thread Starter

Cruising

Joined: Nov 2009

Posts: 10

Likes: 0

Quote:

Originally Posted by ALLEGRO

Afraid of the dark?

Couldn't resist....... TTT

Well it does have stock headlights still...

In all seriousness, I wonder if they have any radio widgets that would interfere with passlock? Does anyone know if it uses anything other than the dinky little resister in the key?

Mar 22, 2010 | 10:35 PM

ALLEGRO

Le Mans Master

Joined: Feb 2003

Posts: 6,683

Likes: 144

From: Memphis Tennessee

B2723 is for PASS-Key detection circuit. Maybe a bad ignition switch??

Mar 22, 2010 | 11:12 PM

Bill Vett

Safety Car

Joined: Feb 2001

Posts: 3,725

Likes: 53

From: Warrington Pa.

How many keys on your fob?? I was told that you shouldn't have to much weight on the ignition key . Just a shot in the dark.....

Mar 22, 2010 | 11:13 PM

Jacks02

Drifting

Joined: May 2007

Posts: 1,515

Likes: 14

From: Gig Harbor WA

Stay out of tunnels.

Mar 23, 2010 | 01:26 AM

use2bl8

Drifting

Joined: Aug 2006

Posts: 1,807

Likes: 4

From: Whitby

Its trying to tell you its wants to be floored to make some noise!

Mar 23, 2010 | 01:55 PM

Firelizard

Thread Starter

Cruising

Joined: Nov 2009

Posts: 10

Likes: 0

Quote:

Originally Posted by Bill Vett

How many keys on your fob?? I was told that you shouldn't have to much weight on the ignition key . Just a shot in the dark.....

That could be something. The steel climber's clip I use as a key-chain, and the drainage grating at the tunnel entrances jostling the whole vehicle.

Odd that the rest of the bumps on Oahu's craptastic roads wouldnt cause it though.

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Mar 23, 2010 | 08:18 PM

dgrant3830

Tech Contributor

Joined: Dec 2006

Posts: 10,962

Likes: 29

From: Van Buren Arkansas

Wounded Warrior Escort '11

Just a dumb thought, try covering the twilight sensor on the top of the dash pad and see if it happens again. If not, manually turn on/off your headlamp switch and check again for any correlation.

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