96 Disco Not Your Usual Cruise Control Question
 

Hi Everyone,


I have owned my 96 Discovery 1 Automatic since 2004. I am relatively new to posting on this forum, but have read it plenty of times during Google searches. Ok, so a Cruise control question that there is hardly any information on. I am determined to fix the Cruise on this vehicle.


What i've done....


Replaced all vaccum lines and have no leaks.
I've used the Cruise control guides to test the set, decel, Brake pedal switches. Jumped the vac pump. All work. I pulled my CC ECU card out and found no visible defects. Ordered a used one on Ebay anyway, still no cruise.


Only issue left. When I use multimeter on CC ECU Connector to check VSS voltage. I get.... when sitting usually 0 volts, sometimes 12 volts. When moving, I get a constant 8.2 volts. No matter how fast I am going.


Speedometer works


ECM gives me speed when I hook my scanner up and drive around with live data running. Although it shows about 5-7 MPH slower than what speedo reads. Speed does not cut out irradicately on Scanner.


I've replaced VSS in past and I know symptoms of that going bad with cutting power to engine. I do not get any of that with current Sensor.


So, There is a circuit board behind the gauge cluster. This is supposed to smooth out the voltage pulses coming from the VSS. It then sends info to the Speedometer, ECM, Service Vehicle Module, and the Cruise Control ECU. Even though I am getting speed data to the speedo and ECM, maybe the signal being sent to the CC is no good. I attached pic of that circuit board.


So earlier, I pulled out my gauge cluster (relatively easy to do) and took a look at that circuit board. So far, no noticeable defects. My next step is to order a replacement board.


Does anyone know why I am only getting 8.2 volts? I have heard a couple people have this steady voltage issue, but no one would ever answer back. Hopefully, someone can relieve me of my aggravation. Thanks.

I replied on Dweb, but basically don't waste your time with the D1 CC ECU. Grab a D2 CC ECU and pigtail from Paul Grant on here and follow the retrofit instructions on this website or Dweb.

Hey Bill, wanna make that CC ECU retrofit thread that Eric made a Sticky? ;)

People all over the world are hip to the retro fit of the DII AMR5700 Hella CC ECU. I can't keep them in stock. The last five or six I had went to Australia of all places! You can pick them up cheap enough on eBay. Just make sure that whomever you buy from can supply an ample pigtail.

If Paul is out of stock there's always the junkyard. Last time I was at the yard I grabbed an ECU and pigtail since I was there. Otherwise, ordering one from Paul was easier than a trip to the yard. :)

Paul,


Do you have a link for the ones you sell?

There is alot of good parts in that Ebay store. I saved it for later reference. I didn't see the CC ECU so I guess I will keep checking until you get some made up.

Sorry, no ECU's at the moment. I just took in three DII's in the last week or so and all the ECU's were presold to a customer in Australia.

Australia rocks!