Will this work to bypass the chip keys?

[RickHaleParker]

First crank - engine catches and starts, runs for about one second, then stalls.

Subsequent cranks work and turn the engine over, but the engine will not fire. I don't know if its fuel or spark or both

The starter inhibitor circuit must have another function like limiting the length of a crank.
The only other posability I can see is to fake the signal at pin B:22 of the ECM.
Somebody would need to scope B:22 and see what going on there.

[abscate]

First crank - engine catches and starts, runs for about one second, then stalls.

Subsequent cranks work and turn the engine over, but the engine will not fire. I don't know if its fuel or spark or both

The starter inhibitor circuit must have another function like limiting the length of a crank.
The only other posability I can see is to fake the signal at pin B:22 of the ECM.
Somebody would need to scope B:22 and see what going on there.

I think that is the code the 4/22 generates from reading the key from the antenna, and that it changes. Thats going to be tough hack.

[wrybread]

Well I got a non chipped key cut today ($55), it works fine to open all doors and turn the ignition, but I can confirm that the engine then cuts off. With a chipped key the engine starts and then immediately drops down to idle. With the non chipped key the engine starts and then cuts off when it would normally drop to idle.

Holding my chip key to the antenna (ignition), the range is indeed tiny.

I'm planning to open the chipped key to extract it's chip and glue it to the ignition so I can use non chipped keys, if anyone sees any problem with this approach please let me know.

[BEJinFbk]

$55 for a non-chipped key? Seems pretty high.
I'd call around for some better pricing...

[wrybread]

What do other people pay for a non chipped S70 style key?

[jimmy57]

On P80 the Immo box does the key recognition and has a handshake and approval with ECM, the reason ECM is plug n play through 98 and not 99 and beyond. No starter interrupt on P80 but P2 uses a more integrated system (immo biz is in the CEM)
where starter will be denied and the ECM biz also occurs if you jumper starter relay.

[abscate]

Well I got a non chipped key cut today ($55), it works fine to open all doors and turn the ignition, but I can confirm that the engine then cuts off. With a chipped key the engine starts and then immediately drops down to idle. With the non chipped key the engine starts and then cuts off when it would normally drop to idle.

Holding my chip key to the antenna (ignition), the range is indeed tiny.

I'm planning to open the chipped key to extract it's chip and glue it to the ignition so I can use non chipped keys, if anyone sees any problem with this approach please let me know.

Make sure you know where you are harvesting so that you don’t brick your only key. That’s a big costly fubar

Tow $250
Volvo $400 for key
Triple stupid tax $250

[wrybread]

I found this old post by @maurinquina that gave me the courage to dig into my key:

viewtopic.php?t=61212

Thanks so much for that maurinquina! This should really be a standard mod.

I now have the rectangular-ish chip pulled from my key, it looks exactly as in his pics. My key is made by Valeo and says "Made in U.K." on one side, as does his, so maybe we have the same key. And thankfully the chip is much larger than a grain of rice, I'd say it's solidly half a Chicklet. I'm posting one of maurinquina's pics in hopes that more people do this mod, since Volvo charging these crazy prices for an overly complicated key system is downright obnoxious.



The extraction was simple, I used these guys to nibble around the corner of the key, gradually exposing more of the chip, and it popped right out. I didn't have to pry at all.

https://www.amazon.com/gp/product/B00FZPDG1K/

The chip is super hard, much harder than the soft plastic of the key handle, so it's easy to avoid cutting into it assuming your snippers aren't too beefy and give you a little bit of feedback. My chip isn't even scratched. And it would be simple to put back into the key if I needed to for some reason.

And there was a small opening on the side of the key with the chip, making it very easy to find.

The next step is figuring out where and how to mount the chip. I guess I could embed it in a dab of epoxy, or maybe just some good tape, or both. If anyone has some suggestions for the how and/or where, invited.

[RickHaleParker]

The next step is figuring out where and how to mount the chip. I guess I could embed it in a dab of epoxy, or maybe just some good tape, or both. If anyone has some suggestions for the how and/or where, invited.

Get a second antenna. Find or fabricate a plastic disk that fits in the antenna ring*. Affix the RFID chip to the plastic disk. This should give you good placement of the RFID chip to the antenna ring. If the antenna ever goes bad, you can just transfer the RFID chip to another one.

Connect it to the harness and hide it up under the dash.

* Body Floor Pan Drain Plug might fit the bill.

[misha]

Just open the steering wheel trim(the one around ignition lock)....place the key or chip around antenna or inside the trim itself...pack it back and you're done.