Hello I have a VT series 1 commodore that will not start. It gets complicated from here though. First of all it would only start if I pressed the remote button on the key pad. As most people will know this sends a RF (radio frequency )message through the air to the body controll module which disarms the immobiliser so that the vehicle will start when the key is turned. The car would then start and go like normal. If I put the key in the ignition ( not pushing the unlock doors button at all) and turned the key the car would start but immediately stall. This suggests that the slip ring is not operating or the key is faulty. I replaced the slip ring with the superceded type ( It is a spring loaded full circle type which is superior to the original "2 halves" type). I am not sure if it is coincidence or not but now the vehicle will not start at all. I tried to introduce a new key to the system using a scan tool but the system will not accept and code a new key. Not sure why. There are no fault codes but the ECU warning light stays on at all times. I would have thought this should be impossible. The LCD display reads "ERROR" at all times as well. Odly the oil pressure light stays on at all times as well. I have checked the oil pressure which is good and replaced the oil pressure switch. I have concerns about the ABS as well, can there be a connection here if the ABS is faulty? So any experts out there who like a challenge and might be able to help? C'mon have a crack.
It sounds like a dodgy BCM to me as well, but seeing as though you've got concerns about the ABS module, it might be worth trying too disconnect the battery, unplug and clean all of the ABS module connectors, and then plugging it back in, and seeing whether it will let you code a new key then. It's a long shot, but if the ABS module is faulty in some way, it may have caused an error issue with the BCM, and you've tried too code a new key at a really bad time. It's a long shot, but it's worth a shot. The other guys might have some other ideas on what too try
Not sure if VT is the same as VX but you can try bcm reset procedure: pull fuse 31, eng.cont/bcm, it's under the bonnet. Pump brake pedal a few times then refit the fuse and see if it starts.
For the VT, to reset the BCM, it says too remove and replace fuse F23 (as a side note it says that an issue where vehicle stalls, when attempting to re-start at times, can mean that the BCM needs too be reset, by removing and replacing fuse F23) Also there is a known issue with keys not coding with a new key shaft, too check that the length of your key shaft is right I hope that helps
Don't ask me where F23 is though, cause that I don't know, but I'd say like Sid888 said, it'd be in the engine bay
The issue that it describes about the engine starting and then stalling, and not starting again, and all of the rest, sounds pretty similar to the procedure that they outline for resetting the BCM, so I'd just locate fuse F23 (wherever that is), remove, pump the brakes a couple of times, and then replace it. Then if that resets your BCM, and everything looks ok, but you need too code your key, then do that then Anyways, I hope that helps
1st try disconnecting battery and either turn headlights on or hold brake pedal down a for minute or two to discharge capacitors inside BCM and ECU if that doesn't work with ignition off remove plug connector to ABS and retry with plug out (you will get brake warning light on dash)which will reset when you refit plug, again with igbnition off does your central locking still operate with old key/remote
G'day lout And thanks for input from all you guys. To answer your question lout, no the original key is not working nor the new one as it has not been coded to the car still. If I disconnect the battery and then turn on headlights they wont work to discharge computer capacitors because the the battery is disconnected and therefore no lights will work anyway. If it is a faulty BCM how can I prove it?. I will not be able to try anything on this car until monday so I will let you know if there is any joy.
Fuse 23 (15A) is in the cabin (under the s/wheel)fuse box and is for wireless....So OP needs to reset Fuse 31 which is under the bonnet in the long fuse box,small 10A blade fuse which is 4th from the fender side.Also it might help to reset to start relay by pulling it out with the fuse (it is the very first cube near the driver side tower close to fender).
Here's where it says too pull fuse F23 too perform a BCM reset on a VT . I could be wrong, but this is what it says in the actual VT service manual. Check the description/list of symptoms on number 6, and you'll see that it very much matches the problems that you're reporting. I think that on a VX that it's fuse 31, but on a VT according too the service manual, it says too remove, and replace F23. Again i might be wrong, and I'm happy too be corrected if i'm wrong, but I'm just quoting the VT Service Manual Oh yeah, i hope that this helps mate
