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Old 07-20-2010, 07:10 AM
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P1499 Code

I am bit confused and frustrated, maybe someone can chime in...I have '02 GC, 4.7, with a P 1499 code that comes up. Code chart says its a cooling fan solenoid problem. Found the solenoid on the fan assembly...cleaned the connections, although they didn't look very bad. Thought it was worthwhile doing, as it was easy, didn't cost anything, and problem seems to be intermittent. Light is still off, but wanting to have a plan B in my pocket, I called an aftermarket parts supplier, he didn't have a listing for this solenoid, neither did the dealer (only talked about a relay for $80...) even though I had a part number from another reliable website. Anybody run in to a problem like this?
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Old 07-20-2010, 11:36 AM
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Re: P1499 Code

Your jeep has the hydraulic driven cooling fan. As soon as you start the engine, the fan will run at 100-500 rpm. Only when the engine becomes hot and extra cooling is needed, the PCM will command the solenoid to ramp up the fan rpm. Most probably this solenoid is bad. It seems to be easy to take this solenoid of, you only need a torq-X bit (forgot about the size, thought it was a 35). Most probably you will find the P/N on the old solenoid. If you take it out when the engine is cool, just a little fluid will come out.
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Old 07-21-2010, 12:23 PM
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Re: P1499 Code

Drove my Jeep today...fault reoccurred. Think I will go for a solenoid, if I can find one. Thanks for the come-back...stay tuned...
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Old 07-21-2010, 01:10 PM
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Re: P1499 Code

Being an intermittent problem, check the wires first as far as possible to see if they have no shaving or sharp bends. It could be a broken wire or a wire shaved through at some metal part.
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Old 07-21-2010, 01:24 PM
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Quote:
Originally Posted by Bricksie View Post
Drove my Jeep today...fault reoccurred. Think I will go for a solenoid, if I can find one. Thanks for the come-back...stay tuned...
Next time it happens, if possible try to tap on the solenoid. It may be just enough to close the contacts and there's you're answer. If makes contact and closes, the points in the solenoid are probably just bad.


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Old 07-21-2010, 05:11 PM
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Re: P1499 Code

This is a hydraulic solenoid valve, not a relay with contacts. Tapping on it however could help if the valve is stuck in any position.
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Old 07-28-2010, 03:40 PM
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Cool Re: P1499 Code

Other forums talk about a relay. The auto parts and the dealer talk about a relay. I can't find and stinking relay. Is there even one on this vehicle? Its a 2002 GC with a 4.7... So far this forum has only talked about the solenoid, which I understand is not available...any comments...?
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Old 07-29-2010, 08:35 AM
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Re: P1499 Code

According the wiring diagram the only relay into this system is the Auto Shut Down relay 8W-30-9 which is in the Power Distribution Center. But this relay makes or cuts the power to many systems.
The relay where they are talking about is only applicable for those WJ which have the electrical cooling fan. It is in fact not a simple relay, but a Pulse Width Modulated control relay which allows for multiple fan speeds.
The hydraulic fan control solenoid (P/N = 05102210AA) was not a part which could be changed separately from the beginning, you had to change the whole hydraulic cooling module as one piece. But lateron the solenoid was sold seperately. Strange that JEEP doesnīt know this number now.
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Old 07-29-2010, 10:20 AM
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Re: P1499 Code

This is very helpful information Frango100. Perhaps I have been chasing my tale a little. Didn't have access to the diagram you have. So I guess I am off to the dealer to see if I can get a solenoid, like the original thread suggested. HOWEVER, there is probably something that tells this solenoid to turn on and off...could I still have something else contributing to this problem? Oh, the plot, she thickens...
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Old 07-30-2010, 06:28 AM
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Re: P1499 Code

Thats right, the drive signal for the solenoid comes from the PCM. This is a Pulse With Modulated signal that gives the speed control. The PCM uses the following inputs to calculate the output for the solenoid: engine coolant temperature, transmission fluid temperature, battery temperature and A/C system pressure.
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Old 07-30-2010, 06:46 PM
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Re: P1499 Code

I talked to the dealer about troubleshooting this problem further, as just going to the store and buying a solenoid off the shelf is not really as easy as it sounds... They said it would be @$90 for an hour's worth of investigating. Don't know if they could pinpoint one of these other sources as being the culprit or not...they did find a corroded connector on my O-2 sensor problem that I was quite impressed with...
AND, to buy a new solenoid at the dealer, ya have to buy the whole assembly's worth of parts for @ $1100! Won't sell me just the solenoid...not available that way...not about to spend that kind of dough on this...IF I decide it IS the solenoid, I will make a trip to the junkyard...
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Old 07-31-2010, 03:22 AM
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Re: P1499 Code

Strange that they donīt sell the solenoid separately, i had red about this. Will look into this again. But the dealer (or probably everybody with a DRB III scanner) should be able to activate the solenoid via the scanner and see if the fan ramps up.
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