Interesting set of issues... Heard they might be connected. Thoughts? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 4 Old 06-22-2015, 06:18 PM Thread Starter
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Interesting set of issues... Heard they might be connected. Thoughts?

2010 JKU Mountain Edition (Sport)

So the other day I was driving around with the woman and she decided she needed some wine- stop at the liquor store and pick some up. Hop back in the jeep and back out of the spot, as I'm pulling forward I get a check engine light. Drive it home and pull 2 codes with my flashpaq; P0480- and P0481-.

So I check it out on google and I haven't gotten much information from that. I cleared the codes and haven't had any trouble yet- Drove it 190 miles today and no issues so far, but haven't had it sitting in traffic with the a/c on or anything taxing.

While googling I saw somebody say something about having this issue combined with the HVAC on/off lights not working.

Next issue, when I bought my Jeep the A/C, Recirculate, Defrost lights did not turn on when I turned on any of these. They just don't turn on, the A/C turns on when I hit the button, but no lights.

Are these related? Any advice for either issue separately or together? Is my TIPM Borked???
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post #2 of 4 Old 06-22-2015, 06:34 PM
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Here is some info for the codes you have:

P0480-COOLING FAN 1 CONTROL CIRCUIT

P0481-COOLING FAN 2 CONTROL CIRCUIT

When Monitored:
With the ignition on. Battery voltage greater than 10 volts.

Set Condition:

The PCM is requesting the TIPM to turn on the Cooling Fan On and it is not operating. One Trip Fault. Three good trips to turn off the MIL.


Possible Causes

CAN C BUS FAILURE

ENGINE COOLANT TEMP SENSOR DTCS SET

COOLING FAN CONTROL CIRCUIT DTCS SET IN THE TIPM

POWERTRAIN CONTROL MODULE (PCM)

2008 Unlimited Rubicon Automatic
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post #3 of 4 Old 06-22-2015, 11:08 PM
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Engine coolant temperature and AC condenser pressure are sensed by the PCM and sent to the TIPM over the can bus. P0480,1 are PCM codes indicating the fans is not coming on as instructed.

The trigger side of the low and high speed relays are grounded by the TIPM. If the fan is commanded on and there is voltage at the TIPM trigger wire odds are the TIPM is bad. If your TIPM is bad you may have to get in line, hundreds are on backorder depending which one you have.

Generally AC will be disabled with a P0480 current. Of coarse there are lots of other issues that could cause your problem. 2010 did not use a can bus HVAC controller like 2011, it uses a multiplex signal to the cab module for AC control.

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post #4 of 4 Old 06-23-2015, 10:51 AM Thread Starter
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Quote:
Originally Posted by MoTech View Post
Engine coolant temperature and AC condenser pressure are sensed by the PCM and sent to the TIPM over the can bus. P0480,1 are PCM codes indicating the fans is not coming on as instructed.

The trigger side of the low and high speed relays are grounded by the TIPM. If the fan is commanded on and there is voltage at the TIPM trigger wire odds are the TIPM is bad. If your TIPM is bad you may have to get in line, hundreds are on backorder depending which one you have.

Generally AC will be disabled with a P0480 current. Of coarse there are lots of other issues that could cause your problem. 2010 did not use a can bus HVAC controller like 2011, it uses a multiplex signal to the cab module for AC control.
I haven't had any issues with overheating or the fan not kicking on, and the A/C has never quit working. Are either of these related to the HVAC buttons/lights not turning on or was that bunk? Any idea what a TIPM costs?
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