C5 MPH Defoult
Thread Starter
4th Gear
Joined: Jul 2004
Posts: 4
Likes: 0
C5 MPH Default
Hi everyone,
I'm a new member and have a few questions that I hope someone can help me with. I own a 1998 convertible that originated in Canada. Due to the car being purchased in Canada, it has a speedometer that is both mph and kph, and 300 is the highest number on the speedometer. The problem is that the speedmeter defaults to kph, which is somewhat annoying. I'd like to have it default to mph. The other issue is that I'd like to be able to turn off the twilight sentinel, but there doesn't seem to be a way to do that. It doesn't have the options that most of the "American" cars have. I have taken the car to several dealers, and nobody seems to be able to resolve either of these issues. Any help out there??
I'm a new member and have a few questions that I hope someone can help me with. I own a 1998 convertible that originated in Canada. Due to the car being purchased in Canada, it has a speedometer that is both mph and kph, and 300 is the highest number on the speedometer. The problem is that the speedmeter defaults to kph, which is somewhat annoying. I'd like to have it default to mph. The other issue is that I'd like to be able to turn off the twilight sentinel, but there doesn't seem to be a way to do that. It doesn't have the options that most of the "American" cars have. I have taken the car to several dealers, and nobody seems to be able to resolve either of these issues. Any help out there??
Last edited by krm53083; Jul 13, 2004 at 09:56 AM.
Instructor
Joined: Jul 2004
Posts: 157
Likes: 0
From: Cleveland Oh
The twilight sentinel is turned on and off via an RPO reprogram of the body control module. The only thing that I am aware of that can access the BCM is the GM Tech II hand held diag device. Not sure about the kph/mph thing.
This site details the procedure for using the Tech II:
http://www.stopforce.com/RPO.html
BTW, I found this info on the Z06Vette forum.
This site details the procedure for using the Tech II:
http://www.stopforce.com/RPO.html
BTW, I found this info on the Z06Vette forum.
Advanced
Joined: Dec 2003
Posts: 59
Likes: 0
From: Fullerton CA
Originally Posted by krm53083
Hi everyone,
I'm a new member and have a few questions that I hope someone can help me with. I own a 1998 convertible that originated in Canada. Due to the car being purchased in Canada, it has a speedometer that is both mph and kph, and 300 is the highest number on the speedometer. The problem is that the speedmeter defaults to kph, which is somewhat annoying. I'd like to have it default to mph. The other issue is that I'd like to be able to turn off the twilight sentinel, but there doesn't seem to be a way to do that. It doesn't have the options that most of the "American" cars have. I have taken the car to several dealers, and nobody seems to be able to resolve either of these issues. Any help out there??
I'm a new member and have a few questions that I hope someone can help me with. I own a 1998 convertible that originated in Canada. Due to the car being purchased in Canada, it has a speedometer that is both mph and kph, and 300 is the highest number on the speedometer. The problem is that the speedmeter defaults to kph, which is somewhat annoying. I'd like to have it default to mph. The other issue is that I'd like to be able to turn off the twilight sentinel, but there doesn't seem to be a way to do that. It doesn't have the options that most of the "American" cars have. I have taken the car to several dealers, and nobody seems to be able to resolve either of these issues. Any help out there??
Intermediate
Joined: Aug 2003
Posts: 28
Likes: 0
From: beenleigh qld
M.P.H. default
By pushing the kph or mph buttons you are selecting the desired function temporarly, If the vehicle is not used for long intervals or the battery is dis-connected then the function will always default to the factory programmed requirement. What we have to achieve here is firstly find our if this function is controlled by the B.C.M. or the speedometer, then comes the "EASY" part how do we change it. Come on all you smarties some- one out there must have the answer. 
RON.
RON.
Racer
Joined: Jun 2001
Posts: 327
Likes: 1
From: Canada
I printed off the following and took it to the dealership. They charged aprox. $25 labour which was the best $25 I have spent on the car. Headlights used to go up everytime I started the car in the garage and would stay on untill I reached the bottom of the street. Can't remember who wrote the original post but here it is:
Anyone who owns a vette in or from Canada knows that we cannot disarm the "twilight Sentinel" on the DIC,..... But I found the code that needs to be deactivated on the BCM, it will only take your dealer 5 min. to do, then you can turn the "twilight sentinel" ON and OFF as you like. I had it done today!!!! this is what needs done:
go to your dealer, and have them hook a "tech 2" to your vette "it is handheld"
go to options, it will ask if the car has the "RPO Z49" yes or no (canadian vettes are the only ones with this RPO)
enter "no"
Next it will ask if you have options:
Real time Damping
active handling
auot headlamp control
etc. (thier is 6 options it ask for) enter yes to the option you have, hit save, exit. your done.!!!!
then go to your DIC, go to "options"
select "twilight on " hit reset, and it is off!!!!!!!!!!!
Anyone who owns a vette in or from Canada knows that we cannot disarm the "twilight Sentinel" on the DIC,..... But I found the code that needs to be deactivated on the BCM, it will only take your dealer 5 min. to do, then you can turn the "twilight sentinel" ON and OFF as you like. I had it done today!!!! this is what needs done:
go to your dealer, and have them hook a "tech 2" to your vette "it is handheld"
go to options, it will ask if the car has the "RPO Z49" yes or no (canadian vettes are the only ones with this RPO)
enter "no"
Next it will ask if you have options:
Real time Damping
active handling
auot headlamp control
etc. (thier is 6 options it ask for) enter yes to the option you have, hit save, exit. your done.!!!!
then go to your DIC, go to "options"
select "twilight on " hit reset, and it is off!!!!!!!!!!!
Le Mans Master
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Originally Posted by love2dye4u
I have 2001 Canadian vette. For mine once I change the display from kph to mph, it will stay as mph unless I change it back to kph mannually by the option button...
MPH sticks on mine once set until I set back to KPH.
Intermediate
Joined: Aug 2003
Posts: 28
Likes: 0
From: beenleigh qld
kph default
You are missing the point"""""" you can play with the KPH or MPH options all you want BUT if you disconnect the battery then reconnect it it will always default to the programmed mode. What we are trying to achieve is to change the programmed mode.NOW do you understand? 
Last edited by ronjon; Sep 7, 2004 at 06:50 PM. Reason: cant read yellow color print
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