Compustar CS925 Anti Grind/Starter Kill, 2009 Scion xB

I'm installing in a 2009 Scion xB², because I couldn't figure out how to install the DEI system

It remote starts just fine, I picked up a Firstech FT-ELOCK relay to go with it

But I can't figure out which wire to use from the grey 12 pin harness?

Any advice please?

Anyone?
I'm kinda at a loss here, I can't get phone support because I'm not an authorized installer
Quoting the installation manual

3-04 Starter-Kill: This option determines the operation of the GWA wire (Any POC on CN3) Must be programmed on Special Option Group #2.
FO1 - Anti grind + Starter interrupt: this option will allow the GWA to provide a negative output when the system is armed or remote started. This will enable a starter interrupt to prevent the vehicle from being started with the key when in an armed state.
FO2 - Anti Grind only: This option will allow GWA to provide a negative output when the system is armed. This will enable starter interrupt and prevent the user from grinding the starter during the takeover procedure.
FO3 - Anti Grind and passive starter interrupt: This option will allow for GWA to provide a negative output when the system is remote started or the passive starter interrupt is engaged. This will prevent the user from grinding the starter during the takeover procedure and enable starter interrupt 45 seconds after the ignition has been turned off.

I have kill&grind enabled in the Weblink menus (I also reflashed the module with FW update) but I don't know which wire it's assigned to

I'm using

POC 1 for parking lights
POC 2 for lock
POC 3 for unlock
POC 7 for horn

That leaves POC 4/5/6 open for reassignment
Which one and how 🤷‍♂️
I've already got the E-Lock relay wired into the starter wire
Green goes to ignition and the blue is the GWA from the module?

Yes.

Starter Kill is POC 29. You can assign it to an unused POC wire and use it
as shown below in the Compustar diagram :

Remember that you must cut the car Starter1 wire.
STARTER1   WHITE (+)    @ IGNITION SWITCH, (WHITE, 8-PIN PLUG), PIN 8
The Ignition connection goes to the Gray IGN1 vehicle wire that already has the CM900-s thick Green wire.

Additionally, your car has two Starter and two Ignition wires. The CM900-s can handle this.
How do you have the CM900-s programmed/wired up?

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Soldering is fun!

I've got the normal two constant 12v and the ground
I've got the green/white 12v light acting as starter 2 (small gauge white)
White as accessory
Blue is acting as my second ignition (small gauge black)
Yellow as my +12v starter (going to the starter side of the kill relay)
Green is primary ignition (to the thicker gauge gray ignition)
I've got the green wire from the relay there too

I did some configuration, I chose black POC #4 to interface with the blue GWA wire off the relay

As I've got it setup now, the starter kill doesn't work, but if you attempt to grind the starter when remote started, the relay kicks in and the engine shuts off

So I think I'm close 🤷‍♂️

If I manually ground the blue wire of the relay with a test light, the engine won't crank

In the POC menu, I can choose GWA or Starter Kill

In option group 3, I left it on the default Anti Grind+Starter Kill

In a perfect world, I want a starter kill that inhibits cranking when the system is armed/locked
No cranking will happen until unlocked
And the anti grind should keep you from grinding the starter when you return the key from pit stop

This seems achievable in my mind?

Do I have to use two different POCs?
One for GWA kill when armed, and another for anti grind?

This is the lower end CM-900 with 4 button one way keyless/remote start
It's not the 900s security unit

You might try setting that chosen POC#4 to Type 18 = GWA and see if that does it.

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Soldering is fun!

That seems to have made it worse
Now it grinds the starter

I hear the kill relay click when I go ignition on, but it still starts and runs

Not sure of all the symptoms.
If vehicle is Locked via SM900-s the GWA signal is output on selected POC. This provides anti-theft Starter Kill.
If your vehicle is locked via Factory Remote or door button the CM900-s doesn't know it and does not output GWA.
When vehicle is running under CM900-s R/S control GWR is output on selected POC. This provides Anti-Grind during R/S runtime.

3-04 = Option 1
Use POC SV = 29

Relay should energize when system is Locked via CM900-s and ignition is turned ON. ( IGN1=ON + GWA )
Relay should energize when vehicle engine is running under R/S. ( IGN1=ON + GWR )
Anti-Grind only works under R/S engine run time.

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Soldering is fun!

I'm gonna reset all options on the module and try again
I just tested it, it seems to hold the ground until I go ignition on
When it should be holding until I unlock with the CS remote?

If I manually hold a ground on the blue wire, starting is inhibited as it should be

This is ironic, because when I tried the DEI 4x03 and their starter kill relay, the kill worked but the remote start didn't

The Compustar is proving the opposite 😭

Weird. You could set an unsed POC to GWA and another to GWR and connect both of those to Blue relay wire. No diodes needed if that is the only wire they are connected to.

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Soldering is fun!

Just tried that, negatory on that too
I see one POC to GWA, another to starter kill
Tied them both to the blue wire
Anti Grind causes the engine to shut off, starter kill still inoperative

Everytime you go ignition on with the key, the relay clicks, but when you crank it gives up and let's the engine start

But if I manually hold ground the blue wire with a test light, cranking is inhibited 🤷‍♂️

Does it matter if I've got the ignition wire of the kill relay on Ignition or Ignition 2?

Maybe my module ground isn't good enough?

I tend to get a bit methodical with multiple issues like this.

Let's go one step at a time to see what's going on.

First we'll do the Anti-Grind.

In this application, the feature is meant to prevent starter grind if the key is inserted and turned to START during R/S engine run time. This signal is called Ground When Running, GWR or Status Output. This (-) signal is only present during R/S run time. So if we Program any unused POC to SV 5 and connect only that wire to the Compustar Starter Kill Relay Blue (-) Trigger wire we can test if this feature works properly.

Simply R/S the engine and while it's running, insert the ignition key and turn it to START (do not depress the Brake Pedal as this will end the R/S runtime).   The relay should prevent the signal from getting to the vehicles starter circuit and engaging the starter with the engine running.

Please note that this feature will not prevent a starter grind if the Compustar system is not doing a R/S and the engine is started with the key and then while the engine is running the key is turned to the START position again. Some cars have this feature "built in". Not sure about your model Scion.

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Soldering is fun!