53,000 miles and Miss Daisy is falling apart (2004).
Last night I had the Cruise Control on... suddenly it disengaged.
That's odd, I didn't hit the brake - at least I didn't think I did.
This morning, I set the CC again, a few moments later, Cruise Control Disengaged - odd, sure I did not touch the brake. Happened again a 3rd time...
Then the Service Active Handling warning popped up again (an issue I was already aware of) - But I needed to know about this cruise control issue, so I checked the codes. Only new code was the HVAC B0363 H.
That seems odd - since that has to do with the AC and not the cruise control....
Could the CC issue have anything to do with another issue such as the 10-PCM 0492 ?
We are having her worked on this coming weekend so I want to attack all the 'easy' issues.
Thoughts?
Thank you.

 

Next time it occurs, check to see if you're getting an active handling problem. That causes a trip.

 

Yes I am getting the active handling message. It popped up after the 3rd time the cruise control disengaged.

 

the Active Handling Code started about 3 weeks ago.

 

How do I resolve this issue? No code popped up regarding the cruise control.
And hoping we do not need to replace the active handling sensor. If we do, we do.
Just need to know how to proceed at the least cost possible.

 

Until you read and post your DTCs,, all your going to get are educated gusses and that going to get EXPENSIVE quickly!

Read the DTCs using the c5 DIC. MAKE SURE that you read the DTCs without TURNING OFF THE IGNITION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!

Start the car and let it idle. Then take it for a drive and cause the problem to occur. When you return home pull the codes BEFORE you shut off the engine.


Do NOT discount the codes with the H following them. They can provide an audit trail for issues going on with the car. They ARE important in diagnosing problems.

Post ALL the codes that you pull with the engine running..........

Some codes go away WITHOUT setting an H code when you shut the engine off. I suspect you will have several codes that will show C or HC that do NOT show when the engine is turned off.


When the Issue happens,, READ the DTCs. Post ALL the DTCs that you see and make sure you inclues all the info

(ie.) C2345 H or P 0113 C or B1322 HC

With the DTC information, you can be guided in the correct repair directions.


READING YOUR C5 Engine Diagnostic Trouble Codes (DTC)

This procedure should be carried out any time you experience a problem with your C5. Most inexpensive store bought aftermarket code readers will ONLY read power train DTC’s. Reading the DTC’s with the C5 built in code reader will allow you to read ALL the modules in the vehicle.

The Diagnostic Display Mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open ect)
3) Press and hold the OPTIONS button
4) While holding OPTIONS, press FUEL button four times within a 10 -second period.

Initially, the on-board diagnostics go into an Automatic Mode which will cycle through each module and shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each module. ( i.e. PCM = 4 codes) If none are present in a given module, you will see No More Codes on the display.

There are two types of diagnostic codes, Current and History designated with a letter suffix, “C” or “H”. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes. More likely it's an indication of an intermittent malfunction.

Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.

Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present; press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles. There are a few body module DTC’s that if set will prevent the module from operating properly. Once the DTC is cleared, the module will return to full function. This is not true for power train DTCs.

If you have never read and cleared your codes, there will probably be a lot of old history DTCs. It is recommended that you clear your codes and see if any come back during a driving cycle. Those are the ones that you need to concentrate on diagnosing.

Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5.

NOTE and a WARNING. You can read the DTCs while the engine is running. I pull mine up all the time while driving.
WARNING. Don’t become distracted while reading DTCs while your driving and cause an accident!!!!! Use common sense and drive safe.

These are some very good C5 Diagnostic Trouble Code (DTC) explanation web sites!!! They also explain how to read the DTCs

Here are some very good sites that explain what DTC mean:

http://www.gearchatter.com/viewtopic11755.php

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix when you post your DTCs!!

NOTE!!! Start the car and let it idle. Then take it for a drive and cause the problem to occur. When you return home pull the codes BEFORE you shut off the engine.


Do NOT discount the codes with the H following them. They can provide an audit trail for issues going on with the car. They ARE important in diagnosing problems.

Post ALL the codes that you pull with the engine running..........

Some codes go away WITHOUT setting an H code when you shut the engine off. I suspect you will have several codes that will show C or HC that do NOT show when the engine is turned off.






Bill

 

There is nothing wrong with the cruise. it is disengaging because of the active handling issue.

 

Bill,
I have read the DTC codes.
Nothing came up for the cruise control.
Today was the HVAC code B0363 and the 28-TCS C 1287 H code
and 10-PCM P 0492 HC

 

Your SWPS sensor is going out. Same thing happened to my 04. About a $65.00 part at www.gmpartshouse.com. Takes about 2.5 to 3 hours to change out.

 

Thank you very much

 

The SWPS sensor, is that the one, where the steering column needs to be removed to be replaced?

 

Yes

 

Are there photos posted here to replace the SWPS sensor?

 

SWPS not listed as a part at GM Parts house.
do you know the part number?

 

I know that at this point I'm only reinforcing what others have already posted, but I had the same thing happen about 6 months ago on my 2003 with roughly the same miles you have on your 2004. It turned out to be the Steering Wheel Position Sensor. There were no cruise control related codes. Next thing that will happen is that you'll be driving down a road and feel the car pull to one side or the other because the active handling has been engaged.

 

Thank you Marine - hoping to get the part this week - guess I will see how long it takes from GM Parts house to get here.
The brakes are being replaced on Sunday - so am hopeful they can do this at the same time.

 

The part # is 88965543 at gmparts house. Cost me $63.83 plus $9.95 for shipping.

 

thank you very much