AC compressor not receiving power

Tiny
HAMMER-75
  • MEMBER
  • 2008 DODGE AVENGER
  • 2.4L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 137,000 MILES
Last summer I completely refurbished the AC system (new lines, evaporator, condenser, compressor) and it worked great. Then it just stopped. I am not getting any juice to the compressor and I just replaced the TIPM with a Dorman TIPM from RockAuto. I still do not have any power to the compressor. Where can I check on the TIPM to see if I have continuity in the wire from the compressor to determine If I received a faulty TIPM? Anything else I should check?
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Monday, June 12th, 2017 AT 10:05 AM

8 Replies

Tiny
HMAC300
  • EXPERT
Was the TPIM programmed to your car after install by a mechanic? That may be the problem. You can check the light blue/white wire at C27 from the PCM that is what turns compressor on. The power does not come from TPIM, but that controls sensors in and out. You really should have a mechanic scan for codes as this may be a CAN/BUS problem.
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Monday, June 12th, 2017 AT 12:23 PM
Tiny
HAMMER-75
  • MEMBER
I scanned for codes prior to installation and none showed up on my Innova scanner. I installed the TIPM. The instructions for the TIPM from Dorman said to turn the key to run for twelve seconds, turn the key off for twelve seconds and then start. I checked for codes again and none showed up. The care starts, runs and drives fine.
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Monday, June 12th, 2017 AT 3:14 PM
Tiny
HAMMER-75
  • MEMBER
I must add that I did not have any power to the A/C compressor with the old TIPM either.
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Monday, June 12th, 2017 AT 3:20 PM
Tiny
HMAC300
  • EXPERT
I am not familiar with Innova scanners but if they are cheap like at auto parts they will not read other modules other than engine/transmission. Also they will not pick up CAN/BUS problems normally only the pro scanners will.
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Monday, June 12th, 2017 AT 3:21 PM
Tiny
HAMMER-75
  • MEMBER
I would say you are correct. It was not a cheap scanner and it was not expensive, about $450.00. If I do not have any voltage from the PCM then it will be time for the local Dodge shop to take a look. Thank you for your help. I know where to check now before I take it into the shop. Just did not want to spend a $100.00 for them to tell me I have a bad wire. One thing I did notice is that the cooling fan is not kicking on when the compressor is supposed to after I have selected AC from the dash controls. Maybe the PCM is going south.
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Monday, June 12th, 2017 AT 3:33 PM
Tiny
HMAC300
  • EXPERT
The pro scanners are around $4,000.00 to $5,000.00 so yes the Innova may be better than auto parts but will not read a lot of stuff. The cooling fan has relays in relay block but is turned on by TPIM module then after relays goes to the fan module. It is at rear of radiator, it goes to two of the relays as well. The can bus problem may be the PCM not talking to TPIM to make some of this stuff work. As they have to talk with each other to work correctly.
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Monday, June 12th, 2017 AT 5:51 PM
Tiny
HAMMER-75
  • MEMBER
I have continuity from C27 at the PCM down to the compressor. So it is not a wire issue. There is one more thing I am going to try before I take it in. After scrolling thru my scanner I did find an HVAC controller fault. Would that possibly be the heat and air controls on the dash, where you adjust the temperature?
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Wednesday, June 14th, 2017 AT 9:43 AM
Tiny
HMAC300
  • EXPERT
Yes It is if there is a code there send it to me and I can send it back to tell you what to check. Designate whether this is auto temp control where you set the temperature as it is different from manual
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Wednesday, June 14th, 2017 AT 9:55 AM

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