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2000 MN6 won't start..

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Old Jan 3, 2009 | 02:02 PM
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Default 2000 MN6 won't start..

I'm not sure what happened. I pulled the car out since it was really nice yesterday. I got a fancy car vacuum thing that runs off the cigarette adapter and I figured I'd use it to clean the inside of the car. Cars drives out no problem. I put it in park and put the key to acc. I run the vacuum and do my thing for about 15 minutes. When I'm done, I turn it off and just wipe down random parts of the car and some dust off the engine bay. When I go to turn the car on again, it doesn't start. No crank. Nothing.

All the lights work as normal. I took the battery out and down to autozone. They said it was good, so I put it back in the car. Tried to start the car and nothing again.

Any ideas what it could be? It pulled out of the garage perfectly fine and it drove perfectly fine before all this.

So far I've:

1. Tried to jump it with my girl's car. Didn't work.
2. Tried using the battery from my Camaro.. didn't work.
3. Tried turning the lights on and then starting it. They don't dim at all, so I don't think it's a battery issue.
4. Cleaned the vats chip on the key and the positive/negative terminals at the battery. Nothing.

Any help would be greatly appreciated. Thanks.
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Old Jan 3, 2009 | 02:23 PM
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Of course you are pushing the clutch all the way in?

A couple of things to check: the clutch switch, the positive terminal on the starter, pull codes.
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Old Jan 3, 2009 | 02:32 PM
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I was trying to find where the clutch switch is located at. I just got the car 2 months ago and haven't ordered the good manual yet, so I'm kinda stuck.

I pulled the codes using the DIC and got:

SDM - B1001 H
A0-CDCM- U1064H
A1-RDCM- U1064H
B0-RFA- U1096H
U1064H
U1016H

Also.. and hopefully I don't sound too dumb, I'm trying to find where the starter is. A couple people said to try banging on it and then starting the car. The car is on my driveway which is slanted, so I can't lift it up unfortunately without moving it and if I let it drift back it'll go into the road and then be stuck there since I can't move it.
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Old Jan 3, 2009 | 03:11 PM
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Ok, I got it to start cranking! Following http://www.c5help.com/c5_no_start.htm I was doing step 7, the Theft Deterrant Relay. I jumped the red and purple wires and it started cranking. Looks like I just need a new relay?
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Old Jan 3, 2009 | 03:51 PM
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GOOD FIND ! Thanks for posting. That starting guide is GREAT !
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Old Jan 3, 2009 | 10:24 PM
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my car has the same problem. Im to lazy to fix it
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Old Jan 3, 2009 | 11:22 PM
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Originally Posted by phils C5 vette
my car has the same problem. Im to lazy to fix it
heh.. so you just dont drive it?
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Old Jan 4, 2009 | 10:00 AM
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If the TDR isn't clicking at all, then your security system most likely is the problem. Is the security light flashing when you try to start? Sure the TDR could have gone bad but I don't hear that very often. More likely the pellets on the key or the ignition switch.
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Old Jan 4, 2009 | 01:00 PM
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Originally Posted by dgrant3830
If the TDR isn't clicking at all, then your security system most likely is the problem. Is the security light flashing when you try to start? Sure the TDR could have gone bad but I don't hear that very often. More likely the pellets on the key or the ignition switch.
It does click when I turn the key. Is it not supposed to or somethin?
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Old Jan 4, 2009 | 05:43 PM
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Ok, so if it is clicking, then its not the security system and if you jumpered the wires and the solenoid turned on engaging the starter, your TDR is bad. Says the contact on the relay itself is burnt. You already surmised that yourself which is cool.
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Old Jan 4, 2009 | 06:32 PM
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So I replaced the relay.. and nothing. Still broke.

Back to the drawing board I guess.

I do have a quick question. The new relay had 5 prongs (2 each side, one in the bottom middle) while the old one has 4 (2 on each side). Is that normal?
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Old Jan 4, 2009 | 07:18 PM
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Originally Posted by dangerz
I put it in park and ,,,,,


If you put the tranny in Park, it ain't no MN6
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Old Jan 4, 2009 | 08:13 PM
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Originally Posted by Silverbullet00
If you put the tranny in Park, it ain't no MN6
I meant that I put it in neutral and set the ebrake.
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Old Jan 4, 2009 | 09:34 PM
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The TDR relay only sends power to the starter solenoid. If its the TDR that is clicking, then the starter should run. If it isn't the relay clicking, then is the security light flashing? You need two people as someone has to feel the TDR while the other is pushing the clutch in. Have you checked the operation of the clutch switch? I"m really starting to think of the ignition switch.
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Old Jan 4, 2009 | 10:13 PM
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Originally Posted by dgrant3830
The TDR relay only sends power to the starter solenoid. If its the TDR that is clicking, then the starter should run. If it isn't the relay clicking, then is the security light flashing? You need two people as someone has to feel the TDR while the other is pushing the clutch in. Have you checked the operation of the clutch switch? I"m really starting to think of the ignition switch.
Well I bypassed the clutch switch using the instructions on c5help and it didn't change a thing. I guess next thing to check would be the ignition switch. I can't find my digital multimeter, but I suppose it could always be the key. Do they just randomly go bad and is there a way to check it without a digital multimeter?

If there is some kind of theft protection going on, how exactly would I disable it? Just unhooking the battery?

The security light seems to flash like normal. When I unlock the car, it starts flashing. I put the key in and it goes away. I haven't checked it in a couple hours and the car is under a cover now since it's stuck outside, but I can recheck tomorrow after work.
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Old Jan 4, 2009 | 10:22 PM
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Originally Posted by dangerz
I meant that I put it in neutral and set the ebrake.
So how did you determine the relay was bad? You jumped red and purple wire, and the car started? That does not mean the relay is bad. Did you check 12 volts at C2 of the TDR with the clutch pedal depressed?
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Old Jan 5, 2009 | 10:02 AM
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I suggest that you send a PM to Bill Curlee as he can better advise you. Have you gone through each and every fuse in both fuse boxes?
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To 2000 MN6 won't start..

Old Jan 5, 2009 | 11:09 AM
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Originally Posted by lucky131969
So how did you determine the relay was bad? You jumped red and purple wire, and the car started? That does not mean the relay is bad. Did you check 12 volts at C2 of the TDR with the clutch pedal depressed?
Sorry, I must've read that guide wrong. I'll do that next. It's raining today and the car is under the cover outside so I can't do anything this afternoon

Originally Posted by dgrant3830
I suggest that you send a PM to Bill Curlee as he can better advise you. Have you gone through each and every fuse in both fuse boxes?
I haven't done that.. I didn't think of that strangely. I checked fuses 4 and 32 (the ones that the c5help site lists) in the passenger side fuse box and they both were ok. I'll check the fuses and shoot Bill a PM then. Thanks!
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Old Jan 5, 2009 | 01:02 PM
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First things first....you need to find your DMM. You can make a quick accessment of what going on with a meter, but you are just guessing without one.

http://www.flickr.com/photos/1545929...51179/sizes/l/


I can only assume that you have checked all obvious connections at the battery and starter for condition and security. Try to reproduce the series of events.
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Old Jan 5, 2009 | 04:13 PM
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Originally Posted by lucky131969
First things first....you need to find your DMM. You can make a quick accessment of what going on with a meter, but you are just guessing without one.

http://www.flickr.com/photos/1545929...51179/sizes/l/


I can only assume that you have checked all obvious connections at the battery and starter for condition and security. Try to reproduce the series of events.
Thanks for that schematic, that helps a ton. I'll be stopping by radio shack today and picking up another DMM. I got into robotics a couple months ago and it must've gotten lost in the pile of stuff in my workshop.

I did check all the obvious stuff, but it was to no avail. Also, where'd you get that schematic from?

I found this post on another forum and the problems sound like exactly what I'm having:
Also, if your problem is the vats, your car will do absolutely nothing when you turn the key. It will act like your battery is completely dead, it will not turn over, it will not click, it will do nothing, but you can tell it's not the battery b/c all the inside lights and radio etc. still work. If when you turn the key, it turns over but just won't start, or won't run, I'm 99.99% positive it's not the vats, b/c the vats will disable the starter.
Mine does exactly that. Doesn't turn over, doesn't click, doesn't do anything when I go from 'on' to 'start'. Let the key out of 'start' and back to just 'on' and everything is back to normal.
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