I took my Armada in for an oil change and to address a vibrating wheel when applying the brakes and they have had it a week for a problem that they discovered where it will not get any power and will not respond when the accelerator is pushed. They say that they were backing it out of the shop and all of a sudden it just would not move. They replaced the accelerator chip thinking that this was the problem but it continues to have the same problem. They have checked the transmission and it is ok and now they are scratching their heads as to what it could be. They have now ordered an ABS Control Unit that they think will solve the problems......but who knows at this point. According to them the truck cranks and runs fine but its as if the accelerator is not pushed at all when its put into any gear. The RPM's do not move or anything. They have had it hooked up to a computer running all kinds of diagnostic tests with no success.
Has anyone heard of or experienced such a problem with the Armada? Anyone have any clues as to what the problem could be?
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G Sp8s
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2004 Armada SE Galaxy 4X2

I had a similar episode with my Titan a couple weeks ago. I was backing up in a parking lot, and when I tried to accelerate in reverse, there was nothing there when I pushed the pedal! This only happened once, but the fact that it happened in reverse, like with yours, has me wonderin if there is a problem or just a fluke. Let us know what they find out about the problem, if anything. I think I'll experiment a little to see if I can replicate it again.

Please post a follow up.

See I knew this could be a problem. Throttle by wire??? Only in this day of technicality would some engineer find it necessary to replace a $10 throttle cable that has worked great since cars existed, with some electronic contraption that probably costs a few hundred bucks. And now there are problems. I'm telling you, when they decide we don't need steering columns anymore, I may just have to start riding a bike. :) Hope they get you fixed up real soon. Let us know what they find.

Some years ago Airbus was demoing their new jet at the Paris Air Show.

Pilot flew too close to the ground and wanted to pull up real fast. Fly by wire system wouldn't allow that maneuver because it thought the plane was landing and plane crashed with all aboard lost. Needless to say, they rewrote that software.

Could the throttle problem on the Titan be as simple as a bad sensor on the pedal?

I have been working on electronic throttle for three years on the dmax. Usually the sw compares two pedal sensors to each other to check for errors. There is also a min learn that learn the min pedal position. They should be able to check codes and watch both sensors to see if there is an error. Even if there is a failure they should have a limp home strategy. This should be easy to diagnose if they have a clue how to use the scanner. If you can get any data from the dealer you could email me and perhaps I could be of some help.

Andy

If the ECU or the throttle wiring harness is disconnected, then the throttle closed and open positions must be relearned. There is a procedure in the Service Manual to do this. Of course, the technicians at the dealership should know this....

If the ECU or the throttle wiring harness is disconnected, then the throttle closed and open positions must be relearned. There is a procedure in the Service Manual to do this. Of course, the technicians at the dealership should know this....

I saw this procedure a few weeks ago while reading the manual. I've been thinking about it ever since. It seems like it would be a good idea to perform this procedure occasionally, even if the tps hasn't been disconnected. An occasional recalibration can't hurt, that I can see.

I have learned something that others may want to check out. If you want to see that your throttle is opening all the way when you floor the accelerator do this:

1. Set the parking brake.
2. Disconnect the inlet air tube from the throttle body so you can see the throttle plate.
3. Turn the key to the Ign. position, but DON'T start engine.
4. Put the shifter in the "D" position.
5. Have someone hold the acceletor to the floor, or block it open.
6. Check the throttle valve, it should be full open.

After 5 long weeks at the service department they finally resolved my accelerator problem and I was finally able to get my Armada back. To resolve the problem they had to replace the ABS Control Unit. For the longest I was told that this part was on National Backorder and they were not sure when it would be available. I then got Nissan Comsumer Affairs involved and they contacted the part manufacturer but there was still a wait for this as well. I then contacted the BBB Autoline and they contacted Nissan about my problems. After all of this I finally decided to contact the General Manager at the dealership and explained that I had waited long enough for this part and suggested that they take this part off of one of their Armada's in inventory to see if it would resolve my problem and when the part finally became available they could just put it back on their Armada. Low and behold they took the part off another Armada and put it on my Armada and it resolve the problems. For all of my trouble Nissan is sending me a $250 gift certificate good for nissan parts, services and accessories. I was willing to accept this because they did supply me with a rental car and picked up the tab.
I am still a little weary as to what caused this problem in the first place because the ABS control unit that was replaced also interfaces with the brake system and they did perform the brake fix on my Armada so this kinda raises my eyebrows.
All in all, I'm just happy to have my Armada back!