Car not starting

Hello and welcome to 2CarPros. I've looked up your issue on AllData and the only tests that are suggested there would have to be performed at the Volvo dealership, using expensive proprietary machinery and such. So that won't be much good to us.

What I do know though is this: (1) The keys in these cars use a cr2032 battery (aka a disk battery) which needs to be strong for the immobilizer system to get the proper code from the key. Change that battery. (2) If that doesn't do it, try getting under the hood and inspecting the starter for corrosion (greenish whitish powdery gunk) on it's connectors. If you see any at all, take off that connector and clean it off using a wire brush, piece of sandpaper, or something along those lines.

(4) You'll also want to check every fuse that you can find. See the attached images for fuse box locations. And here's a general guide that we've prepared: https://www.2carpros.com/articles/how-to-check-a-car-fuse

Start there and good luck to you! Thanks for using 2CarPros.

Harry

Thank you, I will give it a try.

Hi Harry, the car when immobilizer is bypassed, using battery terminal, start for about a minute or so, no rev, all fuses looks fine, one suggest i replace ICU for ignition. Could that be the case?

Yes, it's possible. But I'd like to rule out the other possibilities first. Go ahead and replace the battery in the key if you haven't already. Also, have the key tested at the dealership (most dealers will do that for free or a very low cost).

Which body style S40 do you have. In the middle of 2005 there was a change in body. The old body style had the traditional key with chip. The new body style has the black plastic key.

It is Salon body style and yes it uses black plastic key.

Do you have another key and have you tried using that that as well?

I do not have another key, I am soon to take it to Volvo for inspection of its memory chip.

Please let us know what you find. We are interested to see what it is.

It is still being under service, was told the ICU and ECM needs replacement, and it needs re-programming. So let's see until end of week.

Makes sense, please let us know what happens.

With new key now the car is cranking but it cuts. my mechanic is still working on it but hints, fuse box may have to be replaced at it have memory box, and also I'm told it needs to be replace old memory to new memory. I heavily reliant on expect knowledge, please let me know?

Have you run the codes if not here is a guide to help see whats going on:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.

Run those codes and get that car away from that mechanic. I hate to say it, but it sounds like he's just guessing and changing out parts hoping to get lucky.

I will be taking the car away this week thanks. The challenge is I will have to order it from abroad but its worth the wait. Thanks

I have just enquired with the only shop in SA which imports they are out of stock, they suggested the following, please help me choose the best one.
https://www.importitall.co.za/search.php?query=Diagnostic+scanner+&CatBase=Everything

I like the Foxwell.

FOXWELL NT301 OBD2 Scanner Professional Enhanced OBDII Diagnostic Code Reader R2092.00

let us know.

Thank you all for the expert advices, finally a Volvo specialist attended the car, the scan showed the CEM software crashed and it had to be updated. He however mentioned this could have been caused by poor battery or jump starting with unsuitable cables/batteries. I have now bought a new battery but the car works fine, except that the right windows sometimes do not respond to the immobilizer and hence I lock the car doors manually.

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help. Start a new question for the doors and window problem please.

my sons volvo s40 wont start i tried to jump it with mondeo but it drained my battery to the point were my car just cut out

Do all the lights come on the dash? What does it do when you turn the key? Does it crank over or just makes a clicking noise? Are there any warning messages on the instrument cluster? This guide can help

https://www.2carpros.com/articles/car-cranks-but-wont-start

My car is 2.0 diesel the enjine is turning but is not idling and the problem started when I switched off enjine while its on high rev

you may have damaged someting internally. start with a compression test to verify the motor is able to start

roy

When I attempt to start my Volvo S40 T5, is clicks and yields a message "Anti-Skid is temporary disabled" and the car won't start. After a few seconds the car starts. And then yield the error message "Alarm system service required"

Does it click really fast or just one click?

It clicks very fast and a couple of times before it actually starts

The battery is weak. If you still have a Volvo battery installed, check the ground post. Usually it cracks and causes the battery to leak. So replace the battery and clean the terminals really good. If the corrosion went inside the insulator then you will need to replace the cables. The positive and ground cable come together as an "assembly" As for the warning lights, most likely the faults will be related to low supply voltage due to the control modules. Usually you will the SRS light come on, EPS warning message and so on. You should have all the control modules fault codes reset if the battery is faulty and you have replaced the battery. You should take it in to Volvo for that. Hope this helps and let me know what happens.

My 2006 s40 volvo will not start. All lights and radio works in the car. One side of the battery was corroded. do i need a new battery or something else.

What is it doing? cranks over and will not start or just won't crank over at all/nothing??

When I start my 2004.5 volvo s40, it lights up n clicks couple times but wont start. But if I use jump cable then the car starts. When I drive, it's back to normal. As soon as I turn off the engine, it goes back to not starting up unless I jump cable it. Does this make sense? I have called auto shops but right now I dont have the money to go get it looked at. I was thinking if you can can give me some ideas of what to check n what might cause this problem. Thank you

bad battery, bad connections at battery. check voltage at battery when engine is running. should be 14+ volts.

But when I remove the positive from the battery, the car still runs. Could it be any electrical problem.

you should not remove terminal while car is running. this tells you alternator is charging and keeping power going to run on. have battery load tested. check your connections both ends of battery cables. clicking means insufficient amperage (not voltage)to run starter. which is why other thing work. they dont take high amperage to work. try headlights and see if the are bright and stay bright for a few minutes.

So when I check the headlights, should the engine be on running?

engine not running. headlights draw amperage and can drain weak battery fast.

Okay thank you so much. So if the headlights dont bright longer than usual, I probably need to get a new battery right?

When I start my 2003 volvo s40 it will rev briefly then stall, if I feather the accelerator when I try starting it I can get it to stay running then after approximately 30 seconds the car will start to run on its own. What could the problem be, or how can I diagnose it?

Do you have a check engine light?

Check the fuel pressure and also the coolant temperature sensor

maybe? if they are bright it at least indicates fairly good electrical connection at the battery. if they go dim in ten min it is a pretty good indicator of a weak battery.