Audi 5 cyl 20vt AAN engine
note: use FileArea to upload files (under .
RPM=0 => Tools/capture triggerlog so we can see which trigger seem to be missing
- [vemscfg can be found in the report zipfile]
- [vemscfg file], also default AAN file and the "diff -U2" difference
- no serious problem in the configuration at first glance:
- prohibit seems good for 1.1.96
- configswitch is disabled
- some calibration values differ (good)
- vemslog: STILL not available
- click on "LOG" icon until it becomes green, attempt startup, publish the related file from VEMS_Files directory
- triggerlog: not available (important if RPM=0)
- Tools/Capture triggerlog, attempt startup, publish the related file from VEMS_Files directory
- we would need to check the RPM at the startup attempt !
- is RPM=0 at startup ?
- or RPM=normal (around 180) ? Or nonzero, but abnormal (if so, how) ?
Ignition outputs...
- Ignition outputs visual, switch to test mode
- important if RPM is good at startup attempt
- Did you see spark ? (use a sparkplug on the cylinderhead, make sure sparkplug-body is actually grounded to cylinder head). Do not touch !
- All 5 High-Voltage channels work correctly
- yes, sparking OK
Be careful !
- maybe it's something as simple as blown fuse ?
See [VT help] and tutorial videos.
Measurements
Note: triggerlog was not uploaded, but the images show something surprising:
- The "Camshaft exhaust" is surprising (1 tooth for every 90 primary trigger tooth is OK, it's 270 divby3), we're investigating why it is not "secondary trigger".
Copied from [report] (note: vemslog was not captured or not included in this report either)
log for audi s4 aan
ignition coils tested ok
measurement sensor
ohm between 44/30 ,728kohm
ohm between 45/30 2,69kohm
aan pin 10 0,4ohm
aan pin 19 1,3ohm
aan pin 24 1,2ohm
aan sensor pin 30 4,7mohm
- measurement trigger 49/48 1kohm
- ALSO MEASURE pin49 DC voltage (ignition on, engine off)
- measurement trigger 47/48 1kohm
- ALSO MEASURE pin47 DC voltage (ignition on, engine off)
- aan sensor triger 48 open
- What does this mean ? Sounds to contradict the above 2 measurements (if "open", then it would be infinite ohm, not 1 kohm
Symptoms
- no start
- no spark tested
- why not ?
- no rpm signal
- Assuming RPM=0
- do not know which firmware has been used