Alfa Romeo Tuning Advice

From PrecisionCodeWorks
Jump to: navigation, search

Q: The OBD tool will not communicate?

A: Sometimes the K-Line is fitted to the back of the OBD port. A fly lead running from the ECU to the back of the OBD plug, see OBD tool help for instructions


Q: The EML is flashing after OBD flash

A: This is usually because the self adaptive parameters have been cleared after the flash. The flashing EML means that the engine ECU is requesting a phonic wheel learn. This procedure can be carried out with no equipment. Run the engine to above 70*c, then carry out 3 x accelerations of 6000rpm. the engine must rest at idle between each accelerations. The EML will clear when carried out successfully. By revving 3 times, the ecu takes an average air gap reading from the crank sensor to the crank pulley, this is to allow for oscillations in crank pulley manufacture and also end float on the crankshaft. This allows for precise misfire detection


Q: On a euro 5 car (has stop/start feature) the engine will not turn over after OBD flash

A: This is because self adaptive parameters in the ECU have been cleared after the flash. the ECU requires some simple coding in order to work DTCs logged in the ECU will be:

GEARBOX TYPE RECOGNITION No tools are required, simply turn the ignition on, depress clutch pedal for 5 secs, release clutch, then this will allow the engine to start.

PHONIC WHEEL LEARN see above ^^^

NEUTRAL POSTION SENSOR LEARN A good level diagnostic tool is required to carry out this operation. Make sure the gear lever is neutral and check that it is returning to center ok, then carry out procedure as per the tool instruction


For newer MULTI-AIR engines using the MARELLI IAW 8GMF ECU, you may be presented with DTC P1320 - UNIAIR MODULE LEARN. A dealer tool will be required to reset the UNIAIR MODULE data after the flash. THE REQUIRED ACTION IS IN THE ENGINE ECU CONFIGURATION MENU USING EXAMINER OR WITECH AND CARRIED OUT UNDER ECU REPLACEMENT. NO OTHER TOOLS TESTED AS YET

KNOWN WORKING TOOLS FOR NEUTRAL LEARN

  • FIAT EXAMINER
  • FIAT WITECH
  • MULTIECUSCAN WITH ELM 327 INTERFACE
  • GENUINE AUTOCOM

Q: I am unable to read EDC16c39 OBD over K line on a 159/Brera/Spider

A: This is because the last versions of these vehicles (circa 2010 onwards) are TPROT enabled. These variants require BDM method to read and write. For Giulietta that has EDC16C39 on CAN, these can be read and wrote via OBD no problem.


Q: A particular diesel protocol is missing on the Alfa CMD driver list.

A: For whatever reason CMD haven't listed every engine model on the list. This isn't to say the tool cannot read the ECU. You will find that with FIAT and ALFA a lot of the protocols are the same. e.g. 1.9 120cv driver will read out a 150cv as they share the same kwp2000 protocol.

PLEASE NOTE, THE ONLY THING OPEL/GM AND FGA SHARE ARE THE ENGINES AND CHASSIS. THIS WAS A MASS PROJECT BY FPT (fiat power train technologies) AND GM. GM HAD INVESTED MONEY INTO THE PROJECT AND LATER PULLED OUT. ALTHOUGH THE ENGINES LOOK THE SAME, THE ENGINE CONTROL SIDE IS DIFFERENT. TRYING TO READ OUT AN ALFA ROMEO AS AN OPEL WILL NOT WORK.