I taped (I believe that's what I did) all the trunk switches shut to simulate it being closed but left the trunk open and propped up the meter near the rear window so I could see it from the passenger seat. I used small vice grips to clamp them there.Ģ. Disconnect the battery cable in the trunk and put an ammeter in between the battery terminal and the lug. The details escape me slightly because it's been almost 3 years but from what I remember.ġ. How did you recode the Cas module with ncsexpert? Just write it to factory settings?
I guess lesson learned here is to recode a module first before spending a ton of additional time on other things.Ĭan you tell me how did you code the CAS module,just with a blank MAN file or did you looked at specific options in the module? 10mA draw! #BOOM! Turns out the code must have been corrupt in some way and recoding the CAS module fixed it.Īll I can say is that problem would have cost me a ton at the dealership. I ran the parasitic draw test with my meter in line, set my alarm for 32 mins just to give the system a few extra in case, came back to the car and what do you know.
I was just about ready to take a bunch of readings last night with my meter but before I decided to do that, I reprogrammed the module (not software but the code) via NCSEXPERT. I also ran ISTA-D and it did not show any modules that were staying awake by becoming active after sleep was initiated with a lock sequence. I waited well past 30 mins previously and the meter was still showing 0.5amp draw. Per all the documentation I read, the CAS sends the command to power down the terminal 30g relay in 30 mins or 60 mins if you have phone communications in your car.
Between the actual Terminal 30g relay and the relay on fuse #28 (fan cut off relay), those both were responsible for my 0.5amp draw. The terminal 30g relay powers about 15-20 circuits or so on the board. This relay is one of the replaceable ones on the block. I had reviewed a ton of electrical diagrams and I was trying to determine if someone else's car mirrored what mine was doing.įor what it's worth, the CAS module sends switched power to the Terminal 30g relay on the fuse block. I found the current draw to be on the CAS circuit - fuse #36. I was wayyy past that step in diagnosing this problem. That was the first thing I did to determine I had a problem. I completing testing for excessive current draw by pulling fuses initially last week. I've been trying to diagnose this problem for 1.5 weeks or so. I thought by posting less detail I was doing everyone a favor (HA). I am happy to report that I finally fixed this issue! If the line is in fact dead, you more than likely will hear nothing. See if you can notice the cut off relay just under the front passenger seat clicking or not. When you recorded your last reading, remove fuse #28 and plug it in and out just enough to make contact. Wait an additional 20 minutes and record the voltage again.ħ. Wait 5 minutes and record voltage again on #28.Ħ. Remove the fuse box cover, Using your meter take a reading on fuse #28. Open the glove box, tape the light button so the glove box light is off.ģ. Open the passenger door, manually move the latch on the passenger door to lock it. I also confirmed via ista-d that no modules are becoming powered throughout the night. The CAS module is not shutting down because some other circuit is keeping it from shutting down.ģ. This leads me to believe either the CAS module is bad and not shutting down completely.Ģ. I can send a command from the Ista-d to send the car into sleep and the meter drops to 10mA (right where it's supposed to be). Together that amperage draw adds up to what I'm seeing.Ĥ. this relay powers several relays on the fuse block and one fuse is #28 which also contains a fan relay under the seat. If I pull that relay the meter drops to 10mA. This relay is also hot when the car is supposed to be in sleep. The circuits are powered through a relay on the fuse box. According to the wiring diagram, the CAS module sends power to several circuits via the fuse box. That circuit or relay when energized is pulling 0.3 amps.ģ. Fuse #28 - 5amp (cut off fan relay under the passenger seat and carpet) that circuit is live even though the car is in sleep mode. With the meter inline and the car off, the car is drawing 0.5-0.6 amps while in sleep.Ģ. My response will be somewhat limited on technical details because I don't have the info right in front of me.ġ.