My 2003 licoln ls v8. Is acting up when i drive the speedometer gets stuck at 10mph then the car will go n2 failsafe mode say check advancetrac.an the speedometer wil jump up 2 my speed today it started with additional check transmission and parking brake... Ive heard could b cop battery alternator pcm speed sensors abs module i have no clue wat 2 do need help plzz
help etc abs advancetrac transmission
- Thread starter trenton
- Start date
1LoudLS
Dedicated LVC Member
yep, pretty much sounds about right...
And the voltages???? Has the stock alternator been tasked with charging both batteries? That could easily kill the alternator.
You will need to to progress.
Would a bad or weak alternator cause my speedometer 2 malfunction an all of these errors or is it a sensor or pcm or abs problem i kno im asking alot im just confused i just replaced my trans last year im just trying figure out how costly this repair is gonna be or really what the problem is
1LoudLS
Dedicated LVC Member
everything on this car is completely computer controlled, these computers like most run on electricity, since the alternator is where the electricity comes from. you would be surprised what can fail or act all fukced up when you have a bad or weak alternator...
Fixed it for you.....
Get a digital volt/ohmmeter and learn how to use it. It isn't at all complicated. Check the voltage at the battery when the engine is running and when it isn't. Running should show about 14.4 volts and 12.5 with the engine off.
I can relate. I spend more time trying to get the spelling correct on my iPhone and iPad than on my laptop!! At least the screen is bigger on the 5 than the 4.
joegr
Dedicated LVC Member
From the other information (outside of this thread) you have provided, it sounds more like an ABS (module or sensor) issue. (Still, please do check the electrical system voltage while this is happening. First read DC volts. You want 14.0 to 14.4. Then read AC volts. You want 0.0)
Anyway, the ABS module provides speed information to the other systems on the car. If this info is missing, then no speedometer, electronic parking brake problems, mild ETC failsafe, braking issues, ... (Shouldn't trigger a transmission issue, but resolve the ABS first.)
Anyway, the ABS module provides speed information to the other systems on the car. If this info is missing, then no speedometer, electronic parking brake problems, mild ETC failsafe, braking issues, ... (Shouldn't trigger a transmission issue, but resolve the ABS first.)