MembersPage/RijaRobinson/SFiftyBthirtyTwoVanos

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Vanos preamble

The car already drives like charm
  • so well you would take the family on a holiday: it wouldn't stall, or be nervous or misfire.
  • Maybe connect light-bulb only (between PFET outputs and GND, so you can see in operation: which operates when, while you watch "sectrig position" and play with target table).

Vanos outputs - 4 PFET outputs requested

Output tests - with solenoid disconnected and lightbulb connected

The diodes inside the connectors (from GND to signal) are VERY important, they are "flyback" diodes to prevent kickback from the inductive solenoids.

Document your wiring of the 4 PFET outputs here:

Yes: in inverted mode both bulbs are on

In output test mode only one bulb lights on. No short.

With the whole cam table angle target values set to max advance position the trigger position is stable until car goes into max boost. Then it falls down to max retard until throttle is released.

With the exhaust cam control disabled, the trigger position do not move and keeps its position even at boost.

Conclusion: there is no hardware failure. The only possible reason to unwanted cam retard is that the retard solenoid is fed.

See [retest-repair] or if your measurements show that 1 out of the 4 P-FET outputs (hardware) misbehaves,

Link the vemslog or vemscfg here !

http://vems.hu/vemstune/sharingcenter/reports.php?cmd=view&key=GRn2Fp

There could be 3 scenerios, your sentences will be phrased sg like:

Your Vanos wiring is needed (on your page) in any case, and most likely .vemslog (and .triggerlog also).


TODO: testing the Vanos and camshaft movement.

Camshaft target table is directly related to the "sectrig position" and "third trig position" gauges:

Sectrig position is normally (without cam-advance) 5-35 degrees, not 70 degrees or so. We suspect something.

Measured = 0 ... target - 2 deg - PWM-ing range : OutputA? active and OutputB? inactive , Cam pulse too late

Measured = (target - 2 deg - PWM-ing range) ... (target - 2 deg) : OutputA? active and OutputB? PWM-ing ( closer to target = PWM duty higher )

Measured = (target - 2 deg) .... (target + 2 deg): OutputA? and OutputB? active

Measured = (target + 2 deg) .... (target + 2 deg + PWM-ing range): OutputA? inactive and OutputB? active

Measured = (target + 2 deg + PWM-ing range) ... 360 deg: OutputA? PWM-ing ( closer to target = PWM duty higher ) and OutputB? active , Cam pulse too early

Just document your wiring and measurements, and given the captured vemslog (preferrably with some comment, like "I disconnected ECU output and at 17 sec applied 12V manually to exhaust cam/... solenoid") we can inspect and review !