1999 V70 No Crank/No Start Issue - Have VIDA

Post by **Darkfleet** » 06 Dec 2017, 16:24

Having some weird issues and I'm almost a loss of what this could be. Hoping someone might have some insight on my next move.

Last week my alternator died (battery level was getting low). I drove the car into the garage disconnected the battery, removed the alternator and sent it out for a rebuild. Once returned I reinstalled and as I went to start the car the key would turn but it would not crank. Started doing some investigation as the car started just fine prior to the alternator removal/installation. By bypassing the ignition and jumping the starter with key in POS 2 I get no bangs, almost seems as if the car is immobilized as two times (out of the many) that i have cranked I have gotten 1-2 bangs then the car dies.

Findings:
1. Starter is good - I can bypass the ignition and give 12v to the remote starter wire and the starter turns the enginer (still no bang)
2. By grounding pin 85 on the starter relay I can get the key to turn over the engine - seems to point to 2/76 the Central Locking/Anti-Theft Alarm which is not letting the key start
3.Immobilizer seems to recognize the key in VIDA and everything seems to be good there (shown in picture)
4. I have two batteries which i know are good and try them on the car when freshly charged.. not the battery.
5. I've tried unlocking and re-locking the car with the FOB to reset the alarm module to no avail.

I'm kind of at a loss of how replacing my alternator could have caused this issue.. VIDA also seems to thing that there is an issue with the CDM. Can the CDM cause a no start??

I'd really appreciate some help on this puzzle

Post by **abscate** » 06 Dec 2017, 18:36

Check your fuse 6 ( I think) in the under hood fuse box ...I’ll link to a no crank no start experience on my 99 from a year or so

viewtopic.php?f=1&t=74250&hilit=Oneonta&start=10

Fuse 6 confirmed. If your central locking is working with the door button this probably isn’t it

Post by **Darkfleet** » 07 Dec 2017, 08:35

Hey thanks abscate!

I have been doing a lot of research and happened upon your old post. I've already checked all of my fuses and unfortunately they are all good

Post by **Darkfleet** » 07 Dec 2017, 18:03

Well for any one else who ever stumbles upon this post, I fixed my problem. I noticed when turning the key the ac compressor turned on with a loud click. Thinking this is slowing my crank I pulled off the serpentine belt, shorted pin 85 to ground from the starter relay, turned the key and voila the car started. Left it idling for a few minutes and now it starts normally without the short on pin 85.

Seems like for some reason the alarm locking module was not happy..

Post by **abscate** » 07 Dec 2017, 20:51

Drive it close to home until you can eliminate an intermittent fault condition.

Post by **wizechatmgr** » 08 Dec 2017, 18:22

Was looking at what you had posted. Looks like immobilizer is communicating with key without issue as you observed. The CDM000D worries me. Try removing battery power for ~10 minutes and see if that pops back up on next start.

If so, I would suggest removing battery power again to clear it and then attempting a normal start with tailgate open and see what happens. Occasionally the tailgate's harness wears to the point of a short - it is known to cause issues with immobilizer operation - which if I remember correctly is integrated into the ECM.