warming up active handling
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
warming up active handling
I have a 99 coupe and recently when I get in and pull out the display says "active handling warming up". I hadnt seen this before nor have I heard of this, but it is becoming an every time deal. Eventually it will go off, but i'm curious as to why its starting now when its never done it before.
The CEL also popped on a week or two ago, will pull the codes later today, but would this have any relation to the active handling, it doesn't seem it should since CEL are usually emissions problems. Any common CEL codes i should look out for?
Thanks for the help guys!
The CEL also popped on a week or two ago, will pull the codes later today, but would this have any relation to the active handling, it doesn't seem it should since CEL are usually emissions problems. Any common CEL codes i should look out for?
Thanks for the help guys!
Racer
Joined: Nov 2005
Posts: 404
Likes: 0
From: KY
After the car sits for a decent amount of time(say overnight) it becomes more likely to do it's "warm up." Another thing that can trigger it is driving very slowly upon intial take off for a fair period. For instance: You leave in the morning for the first time and you have a really long drive way that you drive slowly on. The warm up isn't necessarily a pre-cursor to problems. My 04 does it once every other day that I drive, but only upon initial departure. The rest of the day it doesn't need the warm up.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
Thanks for the info. The thing that gets me though is I've owned the car for 2 years and have yet to see this until about 2 weeks ago, now its an everyday thing, just wondering why if it is normal it hasn't always happened. Seems to me something is acting up maybe...
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
Sometimes you'll get that message if, at first take off, your front wheels are turned. The system does a self check of all wheel speed sensors, but the wheels have to be straight so the two fronts are at the same speed. Therefore the "warming up" message as it waits for the wheels to straighten and run a test. However, I think you may have another issue since it just started. Post the codes and see what you've got.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
The AH WARMING UP message may be appearing because your Steering Wheel Position Sensor (SWPS) is getting flakey and getting ready to fail. The EBCM is having a difficult time calibrating the SWPS because it is starting to give "bogus" data, and the EBCM has to calibrate the SWPS every time you start the car. It is possible it could be your yaw or accelerometer sensors, but 90 percent of the time it will be the SWPS.
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Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
For a 1999 the SWPS is part number 26058286 and the GM retail price for the part is $286.76 .... so you REALLY want to be sure that is the failing part. It is the same part whether you have tilt/telescope or tilt only steering column. Usually you will see a DTC like C1287 or C1288 if this is the failing part. I'm not sure what labor would be ... probably in the area of 4 or 5 hours.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
Thanks black Z06. It is continually coming on today so I imagine its something of that nature.
My CEL codes are: P0113 & P1111 which are the Intake air temp high voltage sensor circuit current and intermittant. Anyone know what the actual problem may be? Is this safe to drive, can I take it to richmond for the Corvette Challenge like this?
Thanks for your help everyone...
My CEL codes are: P0113 & P1111 which are the Intake air temp high voltage sensor circuit current and intermittant. Anyone know what the actual problem may be? Is this safe to drive, can I take it to richmond for the Corvette Challenge like this?
Thanks for your help everyone...
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
After doing some searching I have found that it is more than likely coming up because the wiring to the IAT sensor is messed up and needs repaired. If this isn't the case then it needs a sensor which is $25 bucks from GM....Good news!
I also found that this can cause the active handling to need to warm up and once the sensor is fixed/replaced my active handling problem should be resolved as well.
Thanks everyone, gotta love that search feature
I also found that this can cause the active handling to need to warm up and once the sensor is fixed/replaced my active handling problem should be resolved as well.
Thanks everyone, gotta love that search feature
Racer
Joined: Nov 2006
Posts: 490
Likes: 5
From: Tampa Bay Area, U.S.A. (Zombie Nation)
I often get active handling warming up upon first starting when the outside temp is near freezing, but seldom any other time. It hardly ever happens when I'm home in the Sunshine State.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
Ok, I've checked the wiring to the sensor and everytyhing is fine...I replaced the sensor and reset the code, but the light still comes back on. I'm questioning whether it is sealed correctly or not, there is some wiggle room which means air is getting in/out of the hole the sensor is stuck in...could this be part of my problem?
Anyone have any other advice/suggestions?
Anyone have any other advice/suggestions?
Drifting
Joined: May 2000
Posts: 1,917
Likes: 3
From: Southern NH
I agree that you're looking in the right area. The IAT code indicated that you're intake temp was reporting an erroneous value, and this sensor is also used by AH system to determine ambient air temp for initializing the system, i.e. if the outside temp is very cold the AH system will take longer to initialize and hence the "warming up" message.
I would suspect that your connector to your IAT is still the problem. When you say the light still comes on, are you referring to the CEL and if so what codes are you getting? If it's still related to the IAT then you may have a problem with one of the wires in the connector (possibly a broken wire) that's making a poor or intermittent contact. These connectors are known to cause problems because the wiring is very thin and fragile.
Inspect the pins and the wiring very closely and see if you can see any problems. An multimeter may help.
I would suspect that your connector to your IAT is still the problem. When you say the light still comes on, are you referring to the CEL and if so what codes are you getting? If it's still related to the IAT then you may have a problem with one of the wires in the connector (possibly a broken wire) that's making a poor or intermittent contact. These connectors are known to cause problems because the wiring is very thin and fragile.
Inspect the pins and the wiring very closely and see if you can see any problems. An multimeter may help.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Ok, I've checked the wiring to the sensor and everytyhing is fine...I replaced the sensor and reset the code, but the light still comes back on. I'm questioning whether it is sealed correctly or not, there is some wiggle room which means air is getting in/out of the hole the sensor is stuck in...could this be part of my problem?
Anyone have any other advice/suggestions?
Anyone have any other advice/suggestions?
The part numberrs I have are ....
24504388 (grommet) $3.06
12160244 (IAT sensor) $24.52
The prices are GM "list price"
The other thing is, are you sure the CEL is coming on for the same reason ??? Have you cleared and then listed the codes when they re-appear ???
If you are still getting the P0113 & P1111 after replacing the IAT sensor you need to very carefully inspect the wiring from the IAT sensor ... make sure it hasn't been rubbing againsta moving engine part, or vibrating against a sharp piece of metal in the engine compartment ... you are looking for an exposed wire that could be shorting to the engine or to another wire.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
Yes, I'm still getting the same codes. I will re inspect the wires and the connectors. I did transfer the rubber grommet over to the new sensor but when inserted into the air bridge it has a little bit of play, although im not sure this makes any difference.
I will re inspect the wires and go from there...
Thanks again guys!
I will re inspect the wires and go from there...
Thanks again guys!
