2007 Chrysler Aspen, Modules Won’t Program
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=146746
Printed Date: April 26, 2024 at 10:28 PM
Topic: 2007 Chrysler Aspen, Modules Won’t Program
Posted By: mcc llc
Subject: 2007 Chrysler Aspen, Modules Won’t Program
Date Posted: February 24, 2021 at 1:02 PM
T harness install, super simple. Originally was a Compustar DC3 3X lock install, left working perfectly. Customer came back for warranty check and reported it has been hit or miss the last few times he'd tried it. I went over the install, didn't see any obvious problems but it wouldn't start the remote start sequence when I tried. Pulled the module, re-flashed it and it would not program (red flashing LED). Switched the module to another DC3 I had on hand. Same result. Switched out the T harness for another I had on hand, same thing. Decided to try an idatalink CMCHXA0, and it's also failing to program.
No CEL and my rudimentary code reader has no problem connecting so I don't think the CAN BUS is wacky.
I've never seen anything like this on a Chrysler product, wondering if anyone else has.
Replies:
Posted By: mgoetz74
Date Posted: February 24, 2021 at 2:18 PM
with t harness it grounds at the skim harness and for some times the RS doesn't like it. Kind of hit or miss that I have seen. I usually tap a ground into the m4 plug pin 20 (last wire in that harness black wire under red right side). At least that's what I think it is
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33 years as a installer now just a retired old guy. Favorite thing to install/topic are remote starts/car alarms. Stop using test lights!!!
Posted By: mcc llc
Date Posted: February 24, 2021 at 7:01 PM
No kidding? That would actually make perfect sense as to why it was having an intermittent problem with the first DC3. Car is gone for the evening but the customer is a regular so I'll definitely be giving that a shot next I see him and I'll report back with my findings. Thank you so much! I just wish I'd read this earlier, I didn't expect anyone to respond so fast :oops:
If that's what it is I'll just make it standard operating procedure to tap a ground into that pin on any CH5 install.
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