Electrical Problem following manual tranny swap.

[Japedo]

Dealer has had some time to look at the car, and they said that the crank sensor is physically broken!!

Im guess I am the one responsible for this, Im thinking I must have done this when I was messing with the wireing harness. It doesn't seem to fit as neatly on the manual tranny as it did the auto.
Perhaps It got damaged when I was mateng the tranny to the engine, but I find it odd that I didn't notice anything.

Anyways they didn't have the sensor in stock so a new one is supposed to be in monday, and hopefully then it will be alive again!

Maybe someone can answer this question for me. Would a broken crank sensor cause the main system relay to not get power with the key in position 2?

Thanks to all, and I hope it is really that simple.

I feel kind of stupid for hauling it to the dealer for a broken crank sensor but I don't care if they can fix it!

Curtis

[jblackburn]

Maybe someone can answer this question for me. Would a broken crank sensor cause the main system relay to not get power with the key in position 2?

I think it could. I have yet to look at wiring diagrams - my download keeps stopping halfway through the 94 manual. But I think it stands to reason that if it doesn't know where the crankshaft position is, it'll not send the pulse signal for the injectors to the main relay. I'll look at that tomorrow for you.

Anyway, good luck! I know you'll be excited to get your "new" car back on the road!

[Mr_LV]

I had somewhat of a similar problem with my 93 850. Everytime I checked the codes it said the crank sensor was going in and out. The whole wiring harness has to be changed. The camshaft sensor is the same way, if the computer doesn't know where the cam is, it won't send any spark. Make sure to check those next time before you take it to a dealer or a shop that's going to charge a lot. Both are really easy fixes.

[Japedo]

Jablackburn- I hope your correct in that thinking, I am thinking the same thing myself. It just must not give the ECU the go ahead to send the 0.2 volts to the main relay.
I guess a simple way of determining this would be to unplug the crank sensor on a functioning 850, and see if the IAC gets power "buzzes" with the key in position 2.
But the new sensor is supposed to be here today, and if it fixes the problem my question will be answered.

Do you guys think 100$ is a good price for a volvo crank sensor through a dealer? I usually get my stuff through FCP but since the car is at the dealer I told them to order one.

The worst thing is I have a spare crank sensor in the garage off of a 97 S70. BUt the dealer is a 1.5 hr drive away. The old V70 XC would burn close to 30$ in fuel to bring them the part. Plus new sensors are nice to have for peace of mind.

Hopefully ill have an update later in the day.

Japedo

[Japedo]

Didn't recieve a phone call all day, so I called to bug the dealer. Good news is the part is indeed there today, bad news is two of their tech's didn't show up for work this morning, thus they didn't get to it.

The service fella felt bad about the whole thing, and assured me it was going into the service bay first thing tomorrow morning.

So I guess i'll know more tomorrow or someday lol

Japedo

[Japedo]

Its Alive!

THey installed the new crank sensor today and car fired but didn't start, they then found I had a crack in my ignition coil.

Luckly I threw my spare coil in the car before bringing it to the dealwer, they installed it and it started and runs great.

THey drove it around the block and they said the transmission works fine. So im off to pick it up first thing in tha morning.

Im glad that it is running again, and look forward to driving it again.

Japedo

[jblackburn]

Cool. Wanna come to the US and help me put one in mine?

FWIW, the crank position sensor does control the signal for the injectors, while both help to control the ignition timing.

Can't remember where I read that, but just for whatever knowledge it's worth.

[Japedo]

Cool. Wanna come to the US and help me put one in mine?

FWIW, the crank position sensor does control the signal for the injectors, while both help to control the ignition timing.

Can't remember where I read that, but just for whatever knowledge it's worth.

How about you drive up to New Brunswick and i'll do the swap here


Ya it is a good bit of information on the crank sensor controlling the fuel injection signal. If someone has a no start condition "crank but won't start" like I did. And has no signal going to the main system relay"injectors not getting power", they either have a broken wire or a bad crank sensor.

In the past I had a no start condition from a failed cam sensor, but I believe the main fuel relay was still getting signal with this sensor not functioning. I am going to confirm this when I get home by unplugging my cam sensor and putting the key in position 2.

Could be a valuable bit of information for people with no start conditions. If the main relay is still functioning think cam sensor "which seem to fail more then crank sensors"

If main relay not getting signal think crank sensor.