06 with Weird ass AC issues - Competition Diesel.Com

12valvePwr96 · 08-22-2016, 08:33 AM

Got an '06 3500 in my shop doing some weird stuff.. Customer brought it in because the air wouldn't kick on. Evacuated the system, leak tested fine, it had a stored code for the pressure switch so we changed it out along with a new compressor per customer request, and no change. BUT, I can command the AC clutch to come on through the TIPM with a Snap-On Verus. We're leaning towards the actual AC control switch on the dash being bad. What do you guys think? If the TIPM was bad, would I still be able to command the AC on with the scanner?

59turbo · 08-22-2016, 09:43 AM

Can you read the tipm to see if it sees a command from the control head to turn the compressor on? If you can then the tipm is bad but I wouldn't think you could command the compressor on if the tipm was bad. If you can't see an input from the control head to the tipm then I'd see if you actually have an input from the control head on the bottom of the tipm.

SixOhh · 08-25-2016, 01:27 AM

funny this is posted.... i am on my 4th tipm right now and this one is not commanding the a/c clutch. it cost me a new compressor to find this out.

With the compressor unplugged i see 12v coming from the TIPM, BUT after messing around with a power probe i found out that as soon as you plug it back in and complete the circuit you get nothing.

i will never get rid of my baby but words cannot describe how much i hate the as$hole that came up with the idea of a non serviceable open loop style POS. last time i lost the TIPM the truck was brand new and i had NO trailer lights, after that my toy hauler wiring ate up another one.

and FWIW, i only work on dodge trucks in my shop and i do a LOT of A/C work and the A/C controls have never been the culprit.

Sanger · 08-25-2016, 03:43 AM

Had a similar issue, had a new AC compressor replace on a 06 for some reason it would pull more load on TIPM then it liked, replaced it again from a different company and it works fine.

If you hard start it by putting another 12v source to it will it stay on?

Not a fan of the TIPM.

4x4dually · 08-25-2016, 07:09 AM

Quote:

Originally Posted by SixOhh

With the compressor unplugged i see 12v coming from the TIPM, BUT after messing around with a power probe i found out that as soon as you plug it back in and complete the circuit you get nothing.

This is indicative of a bad connector/connection. The connection will pass just enough electrons to make a high impedance digital multi-meter read +12 VDC then dropout when loaded.

Not sure if that helps....but I've seen this a few times on other junk.

Grudgeguy · 08-31-2016, 10:41 PM

Wanna sell the good compressor? ?

dangerous06 · 09-01-2016, 06:03 AM

The wire harness on these trucks suck over time they just disintegrate the insulation and then they touch poof! Or they just break! right at the connector! THE TIPM is a pain but has some cool resets built into it! If you hook up to a bad trailer it will shut off power to it. It's programmed to do this 250 times before shutting off permanently!

08-22-2016, 09:43 AM	#2
59turbo Name: 59turbo Title: Diesel Enthusiast Status: Not Here Join Date: Jul 2010 Member`s Gallery Posts: 155	Can you read the tipm to see if it sees a command from the control head to turn the compressor on? If you can then the tipm is bad but I wouldn't think you could command the compressor on if the tipm was bad. If you can't see an input from the control head to the tipm then I'd see if you actually have an input from the control head on the bottom of the tipm. __________________ 2004 2500 Shortbed reg cab 2wd, Goerend triple disc, Fleece holset, BBi stage 1.5, Fleece 10mm cp3, FASS 150. Best ET to date 11.36@120 with firepunk tuning.

08-25-2016, 01:27 AM	#3
SixOhh Name: SixOhh Title: EPA unfriendly Status: Not Here Join Date: Aug 2008 Location: Magnolia, TX Member`s Gallery Posts: 1,108	funny this is posted.... i am on my 4th tipm right now and this one is not commanding the a/c clutch. it cost me a new compressor to find this out. With the compressor unplugged i see 12v coming from the TIPM, BUT after messing around with a power probe i found out that as soon as you plug it back in and complete the circuit you get nothing. i will never get rid of my baby but words cannot describe how much i hate the as$hole that came up with the idea of a non serviceable open loop style POS. last time i lost the TIPM the truck was brand new and i had NO trailer lights, after that my toy hauler wiring ate up another one. and FWIW, i only work on dodge trucks in my shop and i do a LOT of A/C work and the A/C controls have never been the culprit. __________________ 07' Silver 2500 5.9 4x4 LWB Goerend 48re-csp5/EFI- T&C Mild Cp3-F1 Apex 7.5 -S369sxe Amsoil Coolant Bypass -Airdog-D&J- Hamilton 188/220 -AFE-ARP Opti-Lube H-Town Off-Road

08-31-2016, 10:41 PM	#6
Grudgeguy Name: Grudgeguy Title: 1st gen moron Status: Not Here Join Date: Mar 2013 Location: Janesville, WI Member`s Gallery Posts: 296	Wanna sell the good compressor? ? __________________ Sold 2 93's 97 cclb 4k gsk, 5x14, T3 S366, ATS trans, S&B. 06 cclb 100hp sticks, 64/65/12 SB NOS 74 Duster chaos on 26x8.5 tires THANKS MAD FABRICATION

09-01-2016, 06:03 AM	#7
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	The wire harness on these trucks suck over time they just disintegrate the insulation and then they touch poof! Or they just break! right at the connector! THE TIPM is a pain but has some cool resets built into it! If you hook up to a bad trailer it will shut off power to it. It's programmed to do this 250 times before shutting off permanently! __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

08-25-2016, 03:43 AM	#4
Sanger Name: Sanger Title: Too Much Time Status: Not Here Join Date: Dec 2010 Member`s Gallery Posts: 351	Had a similar issue, had a new AC compressor replace on a 06 for some reason it would pull more load on TIPM then it liked, replaced it again from a different company and it works fine. If you hard start it by putting another 12v source to it will it stay on? Not a fan of the TIPM.