Will the 80 bust my Thanksgiving plans?

[cruiserdan]

The ABS is disabled when the center diff goes into the "lock" position. The information that the center is locked is telegraphed by a "position indicator switch". If the signal isn't sent, the ABS doesn't know it's supposed to stop working.

I would not condone this unless the front driveshaft has been removed. In order for ABS to really know what is happening, each wheel must be allowed to have some independant movement. If front and rear or side to side are locked and a wheel locks up, opposite wheels that would otherwize still roll will also lock up. The resulting lock-up of wheels that would otherwize be able to stop the vehicle completely blows the mind of the ABS computer and you roll off into the sunset...:whoops:

 

[kenton]

Hey C-dan. Your logic is impeccable. When I get off my arse and look through my EWD, I will hopefully be able to translate it into specific pin to (I presume) leave open, along with some easy method of making this easily selectable.

Regarding your last paragraph-- has anyone (safely) tried the experiment of testing ABS on and CDL on? After all, CDL on just adds another relationship between the front and rear tires-- there is already the left/right relationship for both front and rear for full-time 4WD vehicles that is unlike 2WD vehicles. In fact, I'd think that in ABS-engaging situations, the VC has a decent chance of approaching CDL as a mechanical linkage front/rear. Therefore it isn't clear to me that the ABS computer would have difficulty.

Kenton

Logic dictates that if the signal from the CDL 'lock" indicator switch to the ABS computer was interupped, the ABS would still function... The ABS is disabled when the center diff goes into the "lock" position. The information that the center is locked is telegraphed by a "position indicator switch". If the signal isn't sent, the ABS doesn't know it's supposed to stop working.

I would not condone this unless the front driveshaft has been removed. In order for ABS to really know what is happening, each wheel must be allowed to have some independant movement. If front and rear or side to side are locked and a wheel locks up, opposite wheels that would otherwize still roll will also lock up. The resulting lock-up of wheels that would otherwize be able to stop the vehicle completely blows the mind of the ABS computer and you roll off into the sunset...:whoops:

 

[reffug]

The resulting lock-up of wheels that would otherwize be able to stop the vehicle completely blows the mind of the ABS computer and you roll off into the sunset...:whoops:

There's something about the end of this that aww............................

That I don't like.......going to get a now .......................

 

[littlehandegan]

I'm trying to prep for a Thanksgiving holiday trip, but now maybe I can't trust my 80!

This morning I wasn't able to start the 80. I turned the key, and the engine wouldn't turn over. I tried it over a dozen times, no effect. I climbed underneath and whacked the starter with a BF hammer, hopped in and after another couple key turns, it started. I don't know if the whack was useful or not.

I looked at my dash, and the MIL was on! The code is P0360 (correction: P0340), Camshaft sensor A Bank 1 malfunction. I reset the codes, drove to work with a heavy heart. The light didn't come on again, and it started fine when I tried at work immediately after I shut it off, and also fine at lunch time.

I don't know if the MIL had anything to do with the no-start, but it was awfully coincidental. But, maybe my hammer whack accidentally hit some wiring or other item that messed with the camshaft sensor? I dunno.

My wife is starting to remind me that, after the major front axle rebuild, the major heater hose repair and the premature rust on the rear hatch, maybe this isn't such a great purchase after all.

Kenton

Bringing this thread back to life....10 years later almost exactly.

Our 1995 80 is throwing a p0340 camshaft sensor CEL. I have had the" turn the key and nothing happen" symptom occur 1 time about a week ago.

Is it safe to say the starter wearing out is the cause of this P0340, or just a coincidence?! (We also, have a PO136 but installing new downstream 02 this evening)

Thanks