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sprinkles08
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 22534
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
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I have a 2010 Dodge Grand Caravan 3.8l. The a/c stopped

Customer Question

I have a 2010 Dodge Grand Caravan 3.8l. The a/c stopped working. All blowers work. It has freon. No power to compressor. I put power to pos leg on compressor everything works. I checked power to limit switch.. no power. I even put a new one on just in
case but still did not work. Only fuse I could find for HVAC was a 10 amp and its good. I do not know of another fuse box in this van. I checked all fuses and replaxced all relays with another van I have here for parts and still not working unless I put power
to the compressor.
Submitted: 1 year ago.
Category: Dodge
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
You may have a handful of things going on. The problem may be the powertrain control module isn't seeing an a/c request due to a failed control head (unlikely), the compressor clutch driver in the TIPM (module/fuse box) may have failed, there could be an open circuit between the TIPM and compressor, or the compressor may be disabled due to low pressure. The most common cause of a compressor not engaging is low system charge.
What is the static pressure in the system with the engine cool and roughly what is the ambient temperature at the time of testing?
Customer: replied 1 year ago.
when power applied to compressor and it running. 41 on low side 225 high side and will freeze you out of van
Expert:  sprinkles08 replied 1 year ago.
Do you have a scan tool capable of communication with the TIPM?
Customer: replied 1 year ago.
no
Expert:  sprinkles08 replied 1 year ago.
Have you tried a battery disconnect?
Have you tested the compressor clutch control wire?
Customer: replied 1 year ago.
have not tried battery disconnect, how do i test the clutch control wire
Expert:  sprinkles08 replied 1 year ago.
You would need to test it's continuity from the TIPM to the compressor. Let's try a battery disconnect and see what happens.
Customer: replied 1 year ago.
battery disconnect did not work
Expert:  sprinkles08 replied 1 year ago.
First test the clutch control wire for a short to ground.
If it isn't shorted then check continuity or (preferred) load test it from the TIPM to the compressor. The wire is dark blue/yellow all the way from the TIPM to the compressor and it's in pin 50 of TIPM connector 1.
Customer: replied 1 year ago.
wire good
Expert:  sprinkles08 replied 1 year ago.
No codes are setting in the PCM?
Customer: replied 1 year ago.
no codes
Expert:  sprinkles08 replied 1 year ago.
Can you monitor PCM data?
Customer: replied 1 year ago.
Yes but limited
Expert:  sprinkles08 replied 1 year ago.
Can you see a/c high side pressure? Does it agree with a gauge set?
Customer: replied 1 year ago.
yes
Customer: replied 1 year ago.
wait wrong setting, It does not tell me hi side pressure on my scanner
Expert:  sprinkles08 replied 1 year ago.
Does it show a/c request?
Customer: replied 1 year ago.
No it does not show a/c request
Expert:  sprinkles08 replied 1 year ago.
Do you still have a second vehicle to swap the control head with?
Customer: replied 1 year ago.
no I checked the cross reference and it said they were different
Expert:  sprinkles08 replied 1 year ago.
Does ambient temperature show correctly?
Customer: replied 1 year ago.
no has a code for it
Expert:  sprinkles08 replied 1 year ago.
A/C is disabled without a signal from the ambient temperature sensor. Repairing that should repair the a/c also.
Customer: replied 1 year ago.
IS THIS THE AIR TEMP SENSOR? Sorry caps.
Expert:  sprinkles08 replied 1 year ago.
The ambient temperature sensor. It's located in the lower grille opening.
Customer: replied 1 year ago.
There is no ambient temperature sensor on this van. I checked and called dealer and they said the got away from those in 2008
Expert:  sprinkles08 replied 1 year ago.
You said you had a fault code for the ambient temperature sensor and it was not showing the correct temperature, is that not correct?
What is the VIN?
Customer: replied 1 year ago.
It was the air temp sensor, not ambient temperature sensor
Expert:  sprinkles08 replied 1 year ago.
What is the P code that is setting?
Customer: replied 1 year ago.
P0113
Expert:  sprinkles08 replied 1 year ago.
That's for the intake air temperature sensor.
You said previously it does not show the correct ambient temperature. Is that correct or does it not show the correct temperature?
Customer: replied 1 year ago.
It does not show it at all, I can not see any functions except ...coolant temp, rpm, ect.
Expert:  sprinkles08 replied 1 year ago.
You have to press the step button until outside temperature is displayed.
Customer: replied 1 year ago.
I have ordered a BCM. Got one for $65 1yr warranty going to try that.
Expert:  sprinkles08 replied 1 year ago.
The last model year Chrysler minivan that used a BCM was 2007.
Customer: replied 1 year ago.
The recycler called it that. It is the Integrated Control module, engine fuse box
Expert:  sprinkles08 replied 1 year ago.
That's the TIPM. It stores build configuration and isn't something that should be installed used or swapped before vehicles.
Customer: replied 1 year ago.
No a/c request on my new scanner. Ambient air is 96 degrees same as temp outside. Inside on dash temp reads 86 degrees but its a lot hotter than that.
Expert:  sprinkles08 replied 1 year ago.
What module are you seeing that in?
Customer: replied 1 year ago.
I put a Matco hand scanner on the van. OBD II plug under dash
Expert:  sprinkles08 replied 1 year ago.
What module were you communicating with?
Customer: replied 1 year ago.
I am hooked to the OBD II plug on van. My scanner does not tell me which module
Expert:  sprinkles08 replied 1 year ago.
What is the brand and model of what you're using?
Customer: replied 1 year ago.
Creader VI
Customer: replied 1 year ago.
When I put power directly to the blue/yellow wire at the compressor. Everything works including the a/c cooling fan(condenser). If power is removed the fan does not come on.
Expert:  sprinkles08 replied 1 year ago.
I'm on the road now and will reply as soon as I am able.
Expert:  sprinkles08 replied 1 year ago.
I'm sure that is only capable of communication with the PCM. If the PCM isn't seeing a/c request then the control head is likely. You'd need to use a capable scan tool to look at the control head data to see if it is commanding the compressor on, if not and there are no codes set in the control head then odds are it has failed.
Customer: replied 1 year ago.
control head meaning the a/c control panel in dash?
Expert:  sprinkles08 replied 1 year ago.
Yes, the a/c control head is the assembly where a heat and a/c system is controlled.

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