Issues after TMS PnP Reflex Harness Install

[TommyGSpeed]

I recently had the TMS PnP Motive Reflex harness installed on my car at a shop. It replaced the harness that originally comes with the Reflex box. The reason I replaced the original wiring harness is because the shop that installed the kit did a shotty job and caused a phantom draw that was killing my battery. After getting the TMS harness installed, we are now seeing a bunch of codes (image is attached). Anyone do something similar and have the same experience? Could it be possible that the wire taps damaged the wires going into the DME? Thoughts? The TMS harness looks like it’s great quality and I don’t think it’s the cause of these problems.

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[rottmore]

I didn't look up any of the codes but since you don't know what the shop did, you'll have to start troubleshooting it yourself. Hopefully it's just a bad battery but I'd fully charge it to make sure first.

I'll just assume youre on a hybrid aftermarket inlet, so i'd make sure the TMS's "PCV" connector is connected to the OEM harness and not ziptied away, otherwise the reflex box won't receive power.

You'll unfortunately have to pull the panels and carpet off to check and see if the shop installed the power, ground, CAN-high, Can-Low pins to the BDC correctly. I would check the pins from the BDC to the splitter connector too.

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:326d74a1-7c61-4870-8ba1-34f6a69cd7d2/


you don't have to, but if you have a borescope i'd check that fucking blind-tight-nightmare of a jb-welded crank position sensor. Make sure the shop connected it to the right one.

 

[TommyGSpeed]

I didn't look up any of the codes but since you don't know what the shop did, you'll have to start troubleshooting it yourself. Hopefully it's just a bad battery but I'd fully charge it to make sure first.

I'll just assume youre on a hybrid aftermarket inlet, so i'd make sure the TMS's "PCV" connector is connected to the OEM harness and not ziptied away, otherwise the reflex box won't receive power.

You'll unfortunately have to pull the panels and carpet off to check and see if the shop installed the power, ground, CAN-high, Can-Low pins to the BDC correctly. I would check the pins from the BDC to the splitter connector too.

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:326d74a1-7c61-4870-8ba1-34f6a69cd7d2/


you don't have to, but if you have a borescope i'd check that fucking blind-tight-nightmare of a jb-welded crank position sensor. Make sure the shop connected it to the right one.

The car is still at the shop, I'm just trying to help them get some ideas of what could be causing the issue. I had a new battery installed at the same time the TMS harness was installed. They also followed the install video that TMS provides. I almost wonder if it is that crank position sensor causing our issue, is there two sensors down there and they may have accidently connected to the wrong one?

 

[Thraxbert]

They probably connected to the wrong one. Happens often. There's a post about this error about once a month, here. Still, that battery needs a charge. A new battery doesn't mean it's charged.

 

[rottmore]

They probably connected to the wrong one. Happens often. There's a post about this error about once a month, here. Still, that battery needs a charge. A new battery doesn't mean it's charged.

Yea you're right, i see the transmission code now. I assumed the shop would at least gotten that right.

 

[TommyGSpeed]

They probably connected to the wrong one. Happens often. There's a post about this error about once a month, here. Still, that battery needs a charge. A new battery doesn't mean it's charged.

All the connections have been double checked and everything is good on that front. I actually think you're right about the battery because back in June the car threw all the exact same codes after it had died. So there may be a chance that this new battery is bad, right?

 

[TommyGSpeed]

08/29/24 Update. Turns out it wasn't the battery or TMS harness. We ended up removing the TMS harness completely so that the car was technically "stock" with no reflex box plugged in, and then we also repair any DME wires that were damaged from the T-taps that are used to connect the original reflex harness. After that we had a no start. There was a crank sensor error.

2 years ago, the shop that originally wired in the reflex also had issues with the crank sensor so I told my new shop to look deeper into the wiring and the pins for that sensor and behold, the first shop ruined the connection pin for the crank sensor by back-probing incorrectly and caused that pin expand and have a poor connection with the DME and I think with all this plugging and unplugging also didn't help that pin either.

After repairing the damaged pin and plugging back in the TMS harness the car is all happy and ready to rock!

TMS harness is a great product and I wouldn't ever have a reflex box installed without a plug and play harness ever again.

 

[WRX3]

I didn't look up any of the codes but since you don't know what the shop did, you'll have to start troubleshooting it yourself. Hopefully it's just a bad battery but I'd fully charge it to make sure first.

I'll just assume youre on a hybrid aftermarket inlet, so i'd make sure the TMS's "PCV" connector is connected to the OEM harness and not ziptied away, otherwise the reflex box won't receive power.

You'll unfortunately have to pull the panels and carpet off to check and see if the shop installed the power, ground, CAN-high, Can-Low pins to the BDC correctly. I would check the pins from the BDC to the splitter connector too.

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:326d74a1-7c61-4870-8ba1-34f6a69cd7d2/


you don't have to, but if you have a borescope i'd check that fucking blind-tight-nightmare of a jb-welded crank position sensor. Make sure the shop connected it to the right one.

I have a pcv inlet delete so the pcv cord for my reflex is just chilling hanging not pulled in. People keep saying plug into the oem harness, but I’m not seeing it. I will attach a video of what it looks like right now.

 

[TommyGSpeed]

I have a pcv inlet delete so the pcv cord for my reflex is just chilling hanging not pulled in. People keep saying plug into the oem harness, but I’m not seeing it. I will attach a video of what it looks like right now.

The problem was the that when I first had my reflex installed by a different shop, they ruined some of the connection contact points on 2 pins on my DME connectors so it was causing an issue with connection. So I had those connections replaced. Then we had to update the reflex box and the car fired up no issues.

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