VemsAudiAan (2009-12-17 19:22:34)

A motronic55 install might save some time making a harness, but you must always verify the harness reasonably carefully.

This involves

Make your own page for your measurements like MembersPage/TormasiAudiAan, using this as a template. Steps:


Documents and files to use


Config and tables

Find the quick method on VemsTune/QuickStartAudi. For boxes sent out after 2008-07-31 check the "Cam HALL Inv." checkbox in the "Upload Config Files" step.

This quick method is useful because the config is split to basic, trigger, injector and ignout sections to support combinations of 3B and AAN engines with different injectors, with or without cam-HALL inverter and different ignition output setups.

The old method requires more manual steps (also gives a bit more insight):

AAN starting config and tables, for ECU without cam-HALL inverter: [HL install]

Which means ign tdcdelay=58 degrees and h[2] cyl=1 3 5 4 2 . . .

Notes:

Firmware and tuningsoftware


Sensor measurements

Measure sensor resistance against AANpin30.

Take note of the temperature. If the engine is stopped for hours, the coolant and MAT will be close to ambient temperature.

Injectors and idle-air output measurements

Measure injector and idle air pins against AANpin37 (that is the flyback pin, same function as EC36pin23 in standard VEMS docs)

Since the firing order is 1-2-4-5-3, it results in this injector table (counting from the last bin firing cyl 1 first ): 8, 4, 2, 1, 16 It's ok to shift this table, it keeps the injector firing order.


Ignition outputs

Check the spreadsheet (link above) with all the pins.

So this is old standard (with AANpin1 and AANpin23 swapped as in the original doc, only very few were made this way):\n

h[1]=00 48 36 24 12 00 00 00
h[2]=36 46 56 40 66 50 50 50

good: 40<=>66 (ign for cyl1 and cyl3) swapped and (for compatibility with 1.1.24 and later:) all .6 changed to .8:\nÿ2ÿ

If in doubt, just remove sparkplug high-voltage wires (easier if 1 at a time). make a small 1mm gap to ground (with a wire or a sparkplug) and issue mdn04 mdn03 mdn02 mdn01 mdn00 spark-test to see if cylinders fire in the right order


Grounds

Measure that grounds are strongly (max 0.1 Ohm) connected inside the VEMS ECU.

Measure ECU pins: verify that all the above grounds are connected inside the ECU.

Measure that first 3 are connected in the harness. AANpin30 (sensor ground) and AANpin48 trigger ground are likely not connected inside the harness.


Trigger

The secondary trigger crankhome-VR MUST BE reversed. Can be done in the connector on the firewall.

Measure trigger resistance against AANpin48.

Reversing crankhome-VR polarity

Location of the trigger plug:

stik_trigger_morm_2.jpg

Wiring crank home normal:

stik_trigger_morm.jpg

Swap the red and violet wire:

stik_trigger_morm_1.jpg

The wire is swapped:

stik_trigger_byttet.jpg

HALL signal


WBO2 on SSC5 male standard applies to both Audi AAN and 3B (also to BMW):

OBSOLETE SSC4 male WBO2. was used before 2007-08 (now SSC5 is used)


AAN ECU extra connector pins:

SSC6 feemale


3B ECU extra connector pins: AS YOU LIKE

3B note: motronic55, pin1 is EC18pin11 (stepper-D), see pinout

IF YOU USE DISTRIBUTER and one ignition output to control spark for all 5 cylinders, you must limit dwell in config. To allow high spark energy at 1.5+ bar boost especially above 7500 RPM, distributorless ignition (or CDI) is needed.

SSC6 feemale for 3B... unspecified

Note that there is NO best, one-pinout fits all pinout for 3B. The 3B extra pinout is made as requested in the order note.

eg.