celicauk
04-15-2002, 02:56 AM
Ok - Starting this in a new thread so someone might just read it :D
As you may or may not know, I am fitting a Haltech ECU to my 2000 model Celica VVTi (140bhp). The wiring for this is all done and I am now into the programming stage. For this I needed a bit of info on the crank and cam position sensors as well as detail on ignition retard/advance.
I have spoken to Toyota and they have given me the following info.
1 - Crank toothed wheel, this is 36 teeth minus 2 teeth, the missing teeth indicate TDC for 1 (and therefore 4) and the teeth are soaced at 10 degree intervals.
2 - Cam toothed wheel, this is four teeth minus 1 tooth, the teeth are not evenly spaced so the ECU can determine position between 1 and 4.
3 - The cam rotates at 1/2 crank speed so 2 cam rotations per crank rotation.
4 - They don't know the BTDC angle for the Crank position sensor (known as the trigger event).
5 - They can't tell me what the ignition retard/advance is at idle, vacuum or full load. This was no great shock but they did tell me that the ignition will move between -10 degrees and +40 degrees.
If anyone can fill in the blanks, in particular point 4 this would be really helpful and I will send you a free club sticker and hat :D
Cheers
As you may or may not know, I am fitting a Haltech ECU to my 2000 model Celica VVTi (140bhp). The wiring for this is all done and I am now into the programming stage. For this I needed a bit of info on the crank and cam position sensors as well as detail on ignition retard/advance.
I have spoken to Toyota and they have given me the following info.
1 - Crank toothed wheel, this is 36 teeth minus 2 teeth, the missing teeth indicate TDC for 1 (and therefore 4) and the teeth are soaced at 10 degree intervals.
2 - Cam toothed wheel, this is four teeth minus 1 tooth, the teeth are not evenly spaced so the ECU can determine position between 1 and 4.
3 - The cam rotates at 1/2 crank speed so 2 cam rotations per crank rotation.
4 - They don't know the BTDC angle for the Crank position sensor (known as the trigger event).
5 - They can't tell me what the ignition retard/advance is at idle, vacuum or full load. This was no great shock but they did tell me that the ignition will move between -10 degrees and +40 degrees.
If anyone can fill in the blanks, in particular point 4 this would be really helpful and I will send you a free club sticker and hat :D
Cheers