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| Questions and Answers page |
| Trigger info updated |
| Trigger info completed |
| The crankshaft pulley has 4 identical teeth spaced at precisely 90°. The sensor sends a signal to the module whenever a tooth passes a the sensor. From this signal the module determines engine speed (RPM) and the TDC position of each piston (crankshaft position). |
| The crankshaft pulley has 4 identical teeth spaced at precisely 90°. The sensor sends a signal to the module whenever a tooth passes a the sensor. From this signal the module determines engine speed (RPM) and once synchronized also the position of each piston (crankshaft position). |
| THE TDC SENSOR IS 10º ADVANCED FROM REAL TDC. THE PULSE BECOMES POSITIVE AS THE TOOTH APROACHES TO THE SENSOR AND NEGATIVE WHEN IT GOES. (this is just the good polarity for VEMS v3.x VR input) |
| THE TDC SENSOR IS 10º ADVANCED FROM REAL TDC. THE PULSE BECOMES POSITIVE AS THE TOOTH APROACHES TO THE SENSOR AND NEGATIVE WHEN IT GOES. (this is just the good polarity for VEMS v3.x VR input). |
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Phase sensor: VR / Hall type depending on model (most are VR with same polarity as the crank sensor)
The stock system takes the ignition sequence from a 2nd VR sensor situated at the cam (1/2 engine speed). |
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Phase sensor (camsync): VR / Hall type depending on model (most are VR with same polarity as the crank sensor)
The stock system takes the ignition sequence from a 2nd sensor situated at the cam (1/2 engine speed). |
| A phase sensor, located opposite a cam having two teeth separated at 90° (camdegrees) to each other, is fitted inside the distributor. At the passing of a tooth the sensor delivers a signal to the ECU. This signal is similar to the signal supplied by an RPM/TDC sensor fitted at the crankshaft pulley. |
| A phase sensor, located opposite a cam having two teeth separated at 90° (camdegrees) to each other, is fitted inside the distributor. At the passing of a tooth the sensor delivers a signal to the ECU. |
| Polarity of Hall effect sensor (for the models that use it): +5V with teeth producing a value =< 0,4V. |
| Here is the pic of the phase sensor (VR): |
| This looks like a VR sensor, the HALL should be different. |
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The VR signal is similar to the signal supplied by an RPM/TDC sensor fitted at the crankshaft pulley (same polarity).
And here the pic of the phase sensor in Hall effect method (note that the logic of pulses is the same):
Polarity of Hall effect sensor (for the models that use it): +5V with teeth producing a value =< 0,4V. Following this scheme:
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The signal patter is the following.
For VR camsync:
For Hall effect camsync:
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Ignition module (taken from Zlotan)
The ECU sends a Spark-out signal to the ignition module * by factory it's a simple distributor+coil setup, not wasted spark (except the evo2). * dwell is totally governed by the module and cannot be adjusted, unfortunatelly no more data about ignition module ** required input voltage and trigger edge would be important |
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Ignition module. There are versions with single module and distributor and wastedspark versions (distributorless). Both use a BKL3B type ignition module to power coil/s.
This is a scheme of the module connections to ecu and coil:
dwell is totally governed by the module and cannot be adjusted. Input voltage is 12V and trigger edge follows this pattern:
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