Question about 2002 Buick Rendezvous
IF you have an automatic head light module (Day night operation) check that the power when in the night mode is getting to the display. It may have it's own light sensor that turns on the display light and if so it may be faulty as well.
Posted on May 10, 2014
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Posted on Jan 02, 2017
the BCM needs to be programmed to operate the computer. a GM techII is now required to calibrate BCM to airbag, stereo, keyless entry, and control pcm data. This is required to make it all work. a gm service should have it done within an hour or less just call and ask them how much it would be to program new BCM. it might cost @$75 to $125 but it is needed, to allow the BCM to work properly.
Posted on Sep 11, 2009
Testimonial: "ok...i bought the bcm on line (used)...but the gays in the dealer says i have to buy a new one..because the used cannot be to reflashed...or recoded."
There are two square buttons on your dash, just to the left of the steering wheel. Press and hold the left until it blinks and it will allow you to set up the languages and such.
Posted on Jul 21, 2010
Your vehicles instrument cluster speedometer and heads up display unit both receive the same signal from the engine computer for the vehicles speed.The engine computer receives a signal from the vehicle speed sensor in the transmission for this to operate.
This isn't a speed sensor or engine computer failure as both would be erratic or off on signal and usually the check engine light would also come on with this problem here.
One of the two either the instrument cluster or the heads up display unit is at fault and is causing this.
What needs to be done from here is a scan tool needs connected to the vehicle to observe the speed signal on the data list in the engine computer and also in the instrument cluster to see if the speeds match each other.
If the engine computer is showing a different speed then what the instrument cluster is showing then the instrument cluster has an internal failure and needs repaired or replaced.
If both the instrument cluster and the engine computer speed signals match each other then the heads up display unit is faulty and needs replaced.
This is how it needs to be checked/diagnosed to see which is at fault.This is best checked by a dealer using their scan tool but any shop that has a scan tool that can communicate with these systems can also check these here.
If it needs a new cluster or heads up display these would have to be bought at a dealer or the dealer can remove yours and send them in for repair to their authorized repair facility
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Posted on Jun 10, 2012
the obd port is directly connected to the computers on your car.if its not working you will have to check powers and grounds at the port and computer.you could have a bad connection or wire.if all the fuses are good in all the fuse panels then its possible that a wire was damaged during the head work.if so then take it back to who did the job and tell them the problem and ask them to check the wires that were moved during the job just in case.do NOT do this in an acusing way or they will refuse.
Posted on Nov 03, 2013
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