5901/xk01 hood pin/doors open error

It's in a 2004 Trailblazer A4 I6 and all I want to work is the remote start and the alarm/lock/unlock.

I bought this thing almost 2 years ago, but I've just got around to installing it. I wired it up W2W, everything is soldered and everything looks good as far as I can tell. I've read till I was blue in the face trying to figure this out.

Right now the doors lock and unlock, the alarm sounds if I open the door or hood. I can start the vehicle with the key. The wires appear to be correct, I've triple checked them. I've ran the procedure to enable the A4...
Open Door -> Turn Truck On, Then Off -> Hold Valet Button Till It Chirps 3 Times -> Press Button Once -> Press Button Again And Hold It -> When Siren Chirps, Hit Unlock (Siren Will Chirp 2x) -> Turn Truck On Then Off

After unlocking the vehicle via the remote I get a open hood led signal and an open door led signal... 3 and 6 flashes respectively and the 2 way remote also states door open/hood open after I unlock the vehicle, I get no notices when the vehicle is locked.

The doors are definitely closed and I've done everything from disconnecting the hood pin to weighting down the hood pin (I eventually adjusted it so high it broke when I closed the hood). With a multimeter the hood pin measures 11v when the hood is closed. I took this measurement at the pin, at the connector and at the 5901. It also measures 0 when open. having the hood pin connected or disconnected gives the same hood open message... and that makes absolutely no sense to me. I'm not sure how the reading can be backwards either (it should be grounded when closed if I understand correctly).

My grounds I put on a steel shield around the steering column after I drilled out an eyelet to fit the bolt. I also used a washer to ensure good contact.
I followed everything from here...
https://forums.trailvoy.com/showthread.php?t=65742
followed the instructions I got from a year and a half ago from here...
https://forums.trailvoy.com/showthread.php?t=70986

The bypass is an XK01 with AMDL with the default set to 1. I can't get the remote start to work either and have gotten a led blink pattern indicating no/low rpm... but it wouldn't work if it thinks the hood is open so I'm trying to focus on the hood pin input itself at the moment. After that I'll work on the tach learn procedure.

If anyone has some suggestions I would appreciate it greatly.

If the viper sees the hood as open then it will not do anything when you remote start the truck.  Your parking lights will flash a pattern to indicate the hood is open.  If you try to remote start and the truck cycles the ignition, cranks and dies, or doesnt quite try to crank, then it's sounds like a tach situation.   You can get a tach signal at the gauge cluster, it's the only white wire there.  I always run a tach wire in those trucks to ensure reliability.  Don't forget to program it once it's connected. 

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i understand this, but i can't get the hood pin switch to read closed under any situation and i have 11v running to it when disconnected or the hood is open instead of it being grounded.
under all circumstances... disconnected/connected/plunger on the hood switch depressed, i get an open hood error.

my tach wire was soldered in at the inst cluster and i haven't done the tach learn procedure yet because I can't get it to show the hood is closed.

Disconnect, i.e. CUT the hood pin near the 5901, let's see if it's an external cause such as bad pin, bad positioning or the hood pin wire shorting somewhere.
If you still get the error code, faulty 5901.
N.B. As an installer of what seems 1000 years standing, I STILL check the hood pin DURING the install.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Another thought, I'm assuming the hood pin is grey and the trunk pin wire blue, they aren't connected to each other or external sensors are they?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

well I cut the hood pin wire and now I'm getting no door open warning and no hood open warning. the doors opening still set off the alarm.

the blue wire from the 5901 I have going to the XK01 blue wire Door lock harness 1 (unlocks with ground)

correction, it still shows door unlocked, it just takes about 90 seconds to report it

OK faulty hood pin switch or pin switch position or bad wiring leading to a short.
Is there a sleeper circuit on this vehicle? See DEI 1076 on this site.
By blue I meant the blue trunk trigger not the blue door unlock or the blue status output.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

I think I missed the blue H1/7 wire, it's disconnected. As i understand it guys usually hook it to the dome light at the BCM for the trailblazer, probably why I'm getting door open. Does this sound right?

I moved the hood pin and it seems to be happy now.

Remote start still isn't working, I'm getting 8 clicks for the NSS. Currently it's grounded with the other grounds.

I appreciate the help, this is my first install and I really didn't anticipate it being this involved.

forgot to add there is no sleeper circut that i'm aware of

do you have the switch plugged in and turned to on?

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wow, no I had bumped the switch and turned it off.

it attempts to start now, when i hit the remote start all the dash lights light up and then I hear some noises at the engine and nothing happens. It does this a couple more times and then I get a remote start error with no indication of what the problem is.

truck starts and runs fine with the key.

not sure how to proceed with no error messages

Did you learn tach? Did you power all three red wires in the heavy gauge harness?


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Advanced

The tach is learned... start/immediately hold the valet button/led flashes and stays steady/release valet button/turn off vehicle.
The red and RED / black have constant 12v and the RED / white has 12v with the key switched to on.

The violet wire is on the harness side and the green is on the key side.

I've tried it a few times now. I hear the fuel pump prime, the lights flash on the instrument cluster and the gauges do their sweep. Then I hear a click from the relay. After that nothing. It does this three times total. Then I get the remote start error on the remote.

Meter the hood pin at the alarm terminal, I want to know if it's going to ground when the hood is shut. Also how many error flashes? That should tell you what the problem is.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

they heavy RED / white needs to see constant 12volts

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Advanced

just got it sorted out.
i had the 5901s RED / white wire hooked up wrong so it wasn't seeing constant 12v and also didn't have the ground when running for the xk01 hooked up to the 5901 remote start status wire.

I appreciate you guys taking the time to help me out.

v7guy] wrote:

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emote start still isn't working, I'm getting 8 clicks for the NSS. Currently it's grounded with the other grounds.

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Do you have the switch connected to the 5901 and is it in the on position?

The only reason you should be getting 8 flashes during diagnostics is if the NSS isn't grounded or the switched isn't plugged and in the on position.

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By the way, it was brought to my attention, on your abbreviation for circuit you use "CKT". There is not "K" in circuit. Should this possibly be CCT? - R. Robson

hahahahahahaha

the switch not being in the on position was exactly the problem that caused the 8 flashes. I had it wired up and bumped it while soldering a couple wires