Ignition
Early 16v Renaults have a cam mounted distributor, driven by a single coil. The coil has an integrated ignition amplifier with three pin and two pin connectors wired:
Three Pin connector:
- Pin A - +12v feed, on with ignition.
- Pin B - Ground.
- Pin C - Tacho signal out.
- Pin A - Not Connected.
- Pin B - Ignition control.
When the ignition control is disconnected from the ignition module it reads +5v. When it is connected to the ignition module it reads 0v.
Scope traces show the ignition pattern on an idling car:
Later Renaults have a 60-2 trigger pattern flywheel and use a Sagem wasted spark coil pack.
Triggering
Early EFi Renault engines came with an unusual trigger pattern on their flywheel. 20 teeth followed by one tooth twice the normal tooth width, followed by a missing tooth twice the normal tooth width.
This pattern occurs twice to indicate TDC & BDC.
A trigger log of the flywheel has been made:
http://vems.hu/www.vems.co.uk/VEMSTrigger/RenaultToothTimes.txt
Using the Examples from http://www.vems.hu/wiki/index.php?page=InputTrigger%2FTriggerLog\nÿ1ÿ
Looks like a 22-2 teeth pattern (20 tooth: the 40 difference is normal, comes from the way the log is made), but inverted.
This works with standard config using a 20 tooth primary trigger setting. Cranking shows a good RPM signal, config info will be posted once the car is running correctly.