I've got a problem. Well another problem!
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Drifting
Joined: Feb 2006
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
I've got a problem. Well another problem!
Should a malfunctioning wheel speed sensor turn on the Check Engine Light and could it cause converter lockup issues?
I'm having an issue with my torque converter unlocking when it should not (e.g. driving along at 75mph car running 2000rpm, then with no change in throttle postion or speed the rpms increase to about 2350). I'm sure it is not in the tune, since it occured pretune also.
The only codes I show don't seem to have anything to do with the tranny (P1433 and B0367), but while connected to HP tuners the software showed that the LR wheel speed sensor was not reading. I don't seem to have any traction control or abs issues either.
Someone please help? It'll be 2 weeks before I can get back to my tuner to get the transmission data logged.
I'm having an issue with my torque converter unlocking when it should not (e.g. driving along at 75mph car running 2000rpm, then with no change in throttle postion or speed the rpms increase to about 2350). I'm sure it is not in the tune, since it occured pretune also.
The only codes I show don't seem to have anything to do with the tranny (P1433 and B0367), but while connected to HP tuners the software showed that the LR wheel speed sensor was not reading. I don't seem to have any traction control or abs issues either.
Someone please help? It'll be 2 weeks before I can get back to my tuner to get the transmission data logged.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Should a malfunctioning wheel speed sensor turn on the Check Engine Light and could it cause converter lockup issues?
I'm having an issue with my torque converter unlocking when it should not (e.g. driving along at 75mph car running 2000rpm, then with no change in throttle postion or speed the rpms increase to about 2350). I'm sure it is not in the tune, since it occured pretune also.
The only codes I show don't seem to have anything to do with the tranny (P1433 and B0367), but while connected to HP tuners the software showed that the LR wheel speed sensor was not reading. I don't seem to have any traction control or abs issues either.
Someone please help? It'll be 2 weeks before I can get back to my tuner to get the transmission data logged.
I'm having an issue with my torque converter unlocking when it should not (e.g. driving along at 75mph car running 2000rpm, then with no change in throttle postion or speed the rpms increase to about 2350). I'm sure it is not in the tune, since it occured pretune also.
The only codes I show don't seem to have anything to do with the tranny (P1433 and B0367), but while connected to HP tuners the software showed that the LR wheel speed sensor was not reading. I don't seem to have any traction control or abs issues either.
Someone please help? It'll be 2 weeks before I can get back to my tuner to get the transmission data logged.
The answer is NO. It will not effect the TQ Converter lock up. The wheel speed is only used in the EBTCM to compute actions necessary for the active handling and ABS system to function correctly..
Have you looked at the brake pedel switches??? Sometimes thay can cause the converter to unlock. When you apply the brakes, it unlocks the converter. If that switch is misadjusted, it can cause that issue.
Are you using the C5 built in diagnostics system to read your DTCs???
If you loosing wheel speed sensor data, from one or more wheels, I would suspect the sensor wiring (especially the front jumper harnesses) as being faulty. The female pins are known to go bad.
BC
Bill C
Thread Starter
Drifting
Joined: Feb 2006
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
Thank you for the response. When I 1st looked and saw that only one person had responded I was disappointed, until I saw it was you!
FYI: The aftermarket transmission and torque converter are within 300 miles of new. The converter is a 2800 stall. The transmission has a transgo shift kit.
I am using the OBD to read the DTC on the DIC.
Is there a more thorough way?
As for the brake switch, shouldn't that also cause the cruise control to disengage?
While performing my driving test on flat ground I set the cruise control at 2000rpm. The TC unlocked, but the cruise control stayed active.
The unlocking occurs with cruise control off also. It does not happen at the same interval. I may drive 2 miles or it may take 20 miles. Sometimes it locks back up right way, sometimes it doesn't. When I test drove last night to check for codes, I drove at a constant speed for 20 miles with no problem. I then accelerated hard a couple times and within 5 miles afterward it unlocked.
The wheel speed sensor data lose is only on the LR, I will check the connector.
Thanks again!
FYI: The aftermarket transmission and torque converter are within 300 miles of new. The converter is a 2800 stall. The transmission has a transgo shift kit.
I am using the OBD to read the DTC on the DIC.
Is there a more thorough way?
As for the brake switch, shouldn't that also cause the cruise control to disengage?
While performing my driving test on flat ground I set the cruise control at 2000rpm. The TC unlocked, but the cruise control stayed active.
The unlocking occurs with cruise control off also. It does not happen at the same interval. I may drive 2 miles or it may take 20 miles. Sometimes it locks back up right way, sometimes it doesn't. When I test drove last night to check for codes, I drove at a constant speed for 20 miles with no problem. I then accelerated hard a couple times and within 5 miles afterward it unlocked.
The wheel speed sensor data lose is only on the LR, I will check the connector.
Thanks again!
Melting Slicks
Joined: Feb 2006
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From: Sarasota Florida
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Thats NOT true!
I seldom work with AUTOMATICS so, join in and help solve this issue. 
I'll dig a little deeper and see what pops out.
You know the cruise control functions happen in the TAC module. FYI I learned that the other day while helping FARTPIPE solve his cruise control issue.
BC
I seldom work with AUTOMATICS so, join in and help solve this issue. I'll dig a little deeper and see what pops out.
You know the cruise control functions happen in the TAC module. FYI
I learned that the other day while helping FARTPIPE solve his cruise control issue.BC
Thread Starter
Drifting
Joined: Feb 2006
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
Didn't intend to ruffle any feathers. Any and all useful information is greatly appreciated, as I'd love to get this issue sorted out and enjoy my "new" car.
Can the brake switch tell my converter to unlock without telling my cruise control to disengage?
Can the brake switch tell my converter to unlock without telling my cruise control to disengage?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The circuit is quite simple. Here is what happens. The circuit is energized when the ignition switch is in ON, BULB TEST or START. The voltage comes from Fuse (ENG IGN 1, fuse #19 ) That is an ignition switch supplied voltage.
That signal goes to the TCC Solenoid and the solenoid operation is controlled by the PCM.
The first thing that I would do is connect a voltmeter to the fuse for that circuit and see if the voltage remains steady when the issue occurs. The ignition switch is a PRIME SUSPECT in cases like this. Dont rule that out of the issue until you verify that as good.
Once you verify that the power to the TCC Solenoid is good, we need to see if the TCC Solenoid is loosing connection or is the PCM is turing it OFF.
BC
That signal goes to the TCC Solenoid and the solenoid operation is controlled by the PCM.
The first thing that I would do is connect a voltmeter to the fuse for that circuit and see if the voltage remains steady when the issue occurs. The ignition switch is a PRIME SUSPECT in cases like this. Dont rule that out of the issue until you verify that as good.
Once you verify that the power to the TCC Solenoid is good, we need to see if the TCC Solenoid is loosing connection or is the PCM is turing it OFF.
BC
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Thread Starter
Drifting
Joined: Feb 2006
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
Today I had a tech put a scanner on the car while we drove. The converter locked as it should and stayed locked. Went WOT, the converter unlocked as it should. I got out of it and the converter locked back up, but soon unlocked. It seems that making the car downshift a couple times triggers the problem. When the converter unlocked it showed unlocked on his scanner. When he gave it the command to lock, it locked. He appeared to be able to cycle the converter reliably.
I have not tested the voltage at fuse 19, but I thought this information might offer some insight.
Thanks again!
I have not tested the voltage at fuse 19, but I thought this information might offer some insight.
Thanks again!
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Today I had a tech put a scanner on the car while we drove. The converter locked as it should and stayed locked. Went WOT, the converter unlocked as it should. I got out of it and the converter locked back up, but soon unlocked. It seems that making the car downshift a couple times triggers the problem. When the converter unlocked it showed unlocked on his scanner. When he gave it the command to lock, it locked. He appeared to be able to cycle the converter reliably.
I have not tested the voltage at fuse 19, but I thought this information might offer some insight.
Thanks again!
I have not tested the voltage at fuse 19, but I thought this information might offer some insight.
Thanks again!
If he can LOCK and UN-LOCK it at will, sounds like something is telling the PCM to unlock the converter.
Thats what you need to figure out. Could be associated with the TAC module. That does a lot with throttle position information and functions. Something to think about. Scan your Throttle position sensor and accellerator position sensor outputs to see if there erratic. Thats a possibility.
BC
Thread Starter
Drifting
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
Is there, posted somewhere, a list of all of the things that trigger the PCM to issue the unlock command to the torque converter?
Thread Starter
Drifting
Joined: Feb 2006
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
Resolution
After logging the car with HP Tuners and a tech 2 to no avail we decided to just jack up the misfire tables for low, medium, and high RPM, as you would with a cammed car. It worked! I've driven the car about 150 miles, 120 of which was on the highway and the car performed flawlessly!
Thanks to all those that offered help.
Thanks to all those that offered help.
Thread Starter
Drifting
Joined: Feb 2006
Posts: 1,877
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From: Ok! So you don't believe in conspiracies, but will you acknowledge the possibility of there being coordinated activities in secret places? Texas
!!! Update !!!
Had my misfire tables maxed out and the problem went away. I will eventually try to work the table values back down to acceptable levels. Thanks for all the help and advice.
