Ok, since there is all this talk about Fault Codes and MFA Tests i was thinking that we can all compare our results, running condition of our cars, Fuel Injection System and Performance Modifications.
Would it be a better idea to do this off of the VW Vortex message board? I got the following information from Jan's site ( http://www-pal.usc.edu/~jan/vw/Electrical/mfa.test ) CHECK MODE TEST =============== Check mode test verifies MFI is operating with the correct base vehicle information a. set MFI memory switch to position 1 b. switch ignition ON c. press and hold MFI select button d. switch ignition OFF, then back ON e. release mode select button (engine MAP code is displayed) f. press and release mode select button to advance to next mode (country code should be displayed) g. continue pressing and releasing mode select button to advance sequentially from mode to mode. PASSAT Readouts: ---------------- FUNCTION MODE INDICATED VALUE DISPLAYED Engine MAP code - 013 Country code clock 1 speedometer drive ratio L/100km 920 Upper RPM limit* km 7418 Lower RPM limit km/h 1175 Deceleration fuel shutoff oil temp. ** Segment test - All segments light up *= The displayed numerical value must match the chart, it is NOT an indication of the upper and lower overrun fuel cutoff rpm. **= The displayed numerical value has no importance for the check. MFI is Ok if any value is displayed. MEASURING MODE TEST =================== measuring mode that provides a display of measured fuctions during vehicle operation. 1. Set MFI memory switch to position 2 2. switch ignition on 3. press and hold MFI mode select button. 4. switch ignition off , then back on 5. release mode select button (first function is displayed,see chart) 6. start engine and drive vehicle 7. press and release mode select button to advance display FUNCTION/DISPLAY mode/symbol displayed Test sum of programmed bytes * - Intake manifold (mbar)** clock Engine RPM *** km/h Momentary fuel consumption L/100 km Signal from speed sensor **** km Oil temperture (c) oil temperature Ambient temperature ambient temperature *= Displayed value has no importance **= The VDO multifunction indicator displays intake manifold vacuum as a decimal numeric value instead of in mbar. Chart in manual ***= If incorrect go to trouble shooting section (not included:() ****= Numeric value should change. (formula for Can. not included) _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
