Two separate issues, just keeping it in one thread, no need to spam posts for these two items.

These are both on a '01 A4 'vert.

Issue 1: I constantly have to re-adjust my driver's side mirror.

A while back it got hit by someone walking by with a ladder. I managed to pop it back on, but ever since then, the driver 1 presets (which I use) randomly will set it to some wierd angle. I've tried moving it via the controls and saving the position and tried manually moving it to where it's supposed to be (both with the car on and off), but it still goes offset. Is there something damaged, or possibly some setting I can 'reset' to make it not think it's facing some other way?

As a side note, our '03 Avalanche started doing something similar a few months back, but as far as I'm aware its mirror has never been hit.


Issue 2: Twilight Sentinel occassionally doesn't enable.

A couple of months back I decided to start driving with the twilight sentinel enabled, and have to say I generally like it. Up until a few weeks back, it had no issues (I'm running with HID headlights, by the way), but then I started having a problem with it. Randomly, the sentinel would 'engage', but not turn on / pop up the headlights or the dash lights. I would have to go into the options and disable / enable the option for them to work, and then they'd work fine. As far as I can recall, this hasn't occurred while driving, only after starting the car up after sitting for a short while (even if before I stopped the headlights had enabled properly).

 

Huh, was actually thinking about swapping out the battery soon, it's getting a bit long in the tooth I believe. I'll look into that.

 

Had a new battery put in today, headlight issue is still there. However, I noticed something. I happened to be parked facing a glass-faced building, and noticed that the headlights are turning on, they're just not rotating up. Is there a fuse or something related to that which could be causing it?

 

I went out to turn my twilight on, same issue. Lights come on, but do not pop up.

 

Start your own thread.

 

Unless you think it's going to bring more attention to the issue, that makes no sense...

 

Ok then. Good luck with your issue.

 

Good luck tracking this gremlin down. I used to use the sentinel feature a lot, but in driving though a wooded area near twilight the lights would activate and deactivate frequently, to the point that the car in front of me was getting pissed, thinking I was flashing him. Even gave me the finger! LOL!

 

Vato - Lol! Fortunately I haven't had that kind of problem with them

8VETTE7 - That's a lotta good info and things to check out. I haven't had any other issues with the headlights going up or down manually or when the twilight disables. It would suck if I couldn't use the feature, but I'll start taking a look through the other items to see if anything else happens. Turning the stalk with twilight enabled doesn't do anything.. which is actually kind of irritating when you want to manually turn on the headlights and it's not dark.

 

@flaagan, we seriously have the same issue (same color cars, same transmission, I have a targa top though LOL) with the twilight sentinel. I have found something about reflashing something with Tech II as a TSB, so I guess I'm going to try that route through my local chevrolet dealer to see if it has been done, or I'll just leave it off until I get brass headlight gears installed.

here is the TSB:

TSB #030842012 -- TWILIGHT SENTINEL/AUTOMATIC HEADLAMP CONTROL NOT FUNCTIONING CORRECTLY OR IS INOPERATIVE. *TT (NHTSA ID #10005586, NOVEMBER 01 2003)

Maybe the Tech II reflash will be the saving grace, or maybe it will break more things, I'll let you know when I make it to the dealer.

 

Makes sense to me. Minifuse #6 provides 12 volts for the headlight control module "off" input

 

Check the headlamp controller connectors and insure they are properly seated. If not, clean them, then reconnect and see if the problem resolves itself. The headlamp switch sends a command to the headlamp controller to raise or lower the lamps so that signal may not be getting through. Now if you have the twilight sentinel, the signal comes through the headlamp switch from the BCM depending on if the twilight mode is turned on or not or if the headlamp switch is operated manually. Lucky will clarify if I'm wrong or explain it better than I do, but know that its a single wire command to raise both lamps, not two seperate commands/wires.

 

Not for the headlight doors. The 12 volt input(to the HDCM) to raise the doors, is independent headlamp switch(does not go through the MFS). As you know, twilight sentinel also turns on the headlights, which does in fact go through the MFS.

 

Ok, I will agree since I don't have the schematics like you do and I know, you know what you are talking about. My thought was the raise command had to pass through the headlamp switch but it could easily just send the command to the BCM which would in-turn send the command onto the HLCM.

 

Yeah I am bone stock, so no worries there on my end. I'll probably go after the holiday.

 

I disagree. The tune for the engine is within the PCM .....not BCM.

 

Shall be interesting to see what results you guys get.

 

Just thought I'd bump this and see if anyone's gotten any results with a reprogramming?

 

Thats true

I managed to blow that fuse (in the footwell) when I fitted my Euros. It gave exactly the same symptoms. Headlights on but headlights stayed down.