2005 volvo s40 immobilizer
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=132177
Printed Date: May 12, 2025 at 3:27 PM
Topic: 2005 volvo s40 immobilizer
Posted By: 1999glntes
Subject: 2005 volvo s40 immobilizer
Date Posted: September 12, 2012 at 4:57 PM
I am planning on installing a remote start in a 2005 Volvo S40 with a 556u. I have read about problems of the metallic ring blocking the 556u ring signal. I am wondering if it is possible to hardwire the 556u into the factory transponder ring. I have a schematic of the ignition switch and there are 3 wires going to the immobilizer module (which I believe is inside/part of the ignition switch). There is a power wire (powered by keysense wire), a ground wire, and a wire that goes to the Central Electronic Module. Any help would be appreciated. Thank you in advance!
Replies:
Posted By: dasbogie
Date Posted: September 12, 2012 at 5:15 PM
i am certainly no volvo expert but the way I have seen it done is by taking the ignition switch out of the dash and it comes apart in 2 halves. Put the loop for the 556u between the two halves and it works out well.
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Posted By: 1999glntes
Date Posted: September 12, 2012 at 5:47 PM
Thank you, I will have to try that. Do you know if the keysense wire needs to be powered up for the immobilizer module to work and if so how do I prevent the car from "seeing" 2 keys? Thanks again!
Posted By: dasbogie
Date Posted: September 12, 2012 at 7:30 PM
from my limited experience volvo is one of those cars that needs the keysense powered otherwise I believe you will incur a light on the dash
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Posted By: 1999glntes
Date Posted: September 12, 2012 at 8:03 PM
If you power the keysense wire, how do you signal the 556u to turn off when a key is inserted in the ignition switch?
Posted By: tianot
Date Posted: September 12, 2012 at 11:40 PM
you have to power the keysense or else the car will not start. use a relay.
86 & 87 - 12 volts
30 - vehicle keysense wire
85 - GWR or status wire ------------- tianot
Posted By: 1999glntes
Date Posted: September 12, 2012 at 11:55 PM
Will the car shut down when it senses two different keys? If so, how do I get the 556u to shut off as soon as the key is inserted into the ignition switch?
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