Volkswagen/Audi Vehicle Communication Software Manual August 2009 eaz0031B01d rev. A


Fuel Control Learning Adaptation Values



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Fuel Control Learning Adaptation Values
Long-Term Fuel Control
is adding directly to the injector opening time for all memory cells. However, data is only updated under certain idle conditions. Be aware that Idle and Part Load Multiplicative work together to establish the long term FT.
C.1.2 Multiplicative Adaptation
Multiplicative means multiplying or taking the preprogrammed cell base value and multiplying that number by either a correction factor or percent. Here, the correction amount increased or decreased in each memory block cell is dependent on each cell’s base injection pulse. This form of adaptation is required to compensate for fuel control-type problems that get worse with increased engine speed (i.e., a faulty injector. Short term FT in VW/Audi language is usually called O regulation or O control. The readings are constantly changing, directly responding to oxygen sensor (OS) input. Normal readings are usually in the ±10% range with 0 as the midpoint. If it gets too far off, Long-term additive or multiplicative adjusts the window back to the midpoint balanced state).
Multiplicative adaptation correction indicates the long-term FT correction that the ECM is applying to the air/fuel mixture during closed loop operation over the middle to upper range of engine operation. VW/Audi use the term Multiplicative Mixture Adaptation because it is a percent correction factor based on the individual base injection value for each memory cell. Cells are constantly updated based on feedback operation. If any cell stores an update that is beyond the neutral feedback value, a correction is then factored into the injector pulse-width calculation. To maintain the optimal air/fuel ratio of 14.7:1 for catalytic converter (CAT) efficiency, the ECM monitors the O2Ss and calculated load. From this information, the ECM calculates a percent value that indicates how much to enrich or dilute the fuel mixture. Sometimes, the ECM makes fine tuning adjustments across the complete fuel map by adjusting the IDLE (Additive) FUEL TRIM (for example, when a fine adjustment is needed across the range to compensate for fuel injector drift).


Volkswagen/audi
Safety message conventions
Safety information
Chapter 2: introduction. 3
Table of contents
Appendix b troubleshooting ............................................................................................... 154
Appendix c fuel control learning adaptation values ...................................................... 157
Chapter 3operations
Identify the vehicle by entering vin digits
Ber: unknown at this time.bev
Bek: unknown at this time.1.9l tdibew
Aeb, atw, aug, awm
Ayh: unknown at this time.bkw
Aha, atq: on the block in front of the right cylinder head.aha only
Awn: unknown at this time.bbd
Bas: on the right-hand side at the rear of the cylinder head.bcy
Amb: unknown at this time.bkb
Automatic transmission
Manual transmission
To select a system for testing:
To access a demonstration:
Select the expert mode function
Expert modeusing expert mode
To perform an automatic system test:
Using expert mode
Note the following regarding control module coding:
Display group number
Example 1: 2002 vw jetta drive-by-wire, bosch me 7.5 control system
Example 4: late model motronic 7.5
Expert modetesting in expert mode
Chapter 5testing
Testingtesting engine systems
Data groups displays data in diagnostic groups to make problem solving easier.•
To display data groups:
To run actuator tests:
Warningrisk of erratic vehicle response.•
Functional test menu > basic settings
Expert mode > engine management master > basic setting
Body adaptation).
Ignition timing.
Basic settings and fuel trim accelerated learning
Crankshaft sensor wheel learning.
To reset the service light:
Pre-set functions
Read, set/reset functions
Transmissiontransmission features
Table 5-7 transmission types and system descriptions (part 2 of 4)transmission
Table 5-7 transmission types and system descriptions (part 3 of 4)transmission
Table 5-7 transmission types and system descriptions (part 4 of 4)transmission
Part numbervin
Testingtesting transmission systems
Kickdown function.
Fail-safe functions of the tcm
Fail-safe mode with active control module
Emergency operation 2
Testingtesting electronic throttle systems
What should i do if i get pedal position faults?
Throttle position sensor (v) ______________________________________ 4.380
Adaptation status ok
Throttle valve angle (degrees) ________________________________________ 2
Epc indicator light operation
Testingtesting abs systems
Throttle valve angle sns 2 (%) _______________________________________ 11
Abs systemscodes
Testingtesting immobilizer systems
Immobilizer ii engine control module replacement adaptation
Key coding (adaptation)
Immobilizer iii engine control module replacement adaptation
Immobilizer ii and iii adaptation remote key programming
To match ignition keys to radio frequency remote control:
Important tips for setting immobilizer adaptations
Passat, new beetle, new jetta, new golf
How do you tell if you have an immobilizer?
What does the scan tool do on immobilizer ii?
Electronic instrument panel, type a
Electronic instrument panel, type b
Electronic instrument panel, type c
Testingtesting electronic instrument panel systems
Electronic instrument panel, type f
Electronic instrument panel, type g
Electronic instrument panel, type h
Electronic instrument panel, type i
Electronic instrument panel, type k
Note the following when working on srs systems:
Testingtesting can data bus systems
Prioritycontrol unit
Chapter 6data parameters
Input or feedback parameters
Data parameters
A/c compressor off)
A/c switch ___________________________________________________ (range on/off)
Accel.pedal position sns 1(%)
Adaptation error ___________________________________________ (range yes/no)
Adp eng speed sensor(crown gear) __________________ (range io or running)
Adp stopped(time exceeded) _________________________________ (range yes/no)
Adp value canp system __________________________________ (range not available)
Adp value mixture(bank1)(%)
Air divert valve _____________________________________________ (range on/off)
Alternator defect __________________________________________ (range yes/no)
Ambient temperature(°c/°f) ______________________________ (range not available)
Base value throttle adjuster __________________________ (range not available)
Battery(v) _______________________________________________ (range not available)
Battery voltage too low ___________________________________ (range yes/no)
Brake pedal switch range open/closed)
Camshaft position(bank 2)(°)_____________________________ (range not available)
Canp flush ________________________________________________ (range 0 to 100%)
Canp valve closed __________________________________________ (range yes/no)
Canp valve on min mode _____________________________________ (range yes/no)
Catalyst temperature(°c/f) _____________________________ (range not available)
Clutch pedal pressed ______________________________________ (range yes/no)
Control value mixture(%)
Coolant temperature >80°c _________________________________ (range yes/no)
Ctrl value mixture/o2(%) ________________________________ (range not available)
Current consumption iac(a)_____________________________ (range not available)
Deceleration enleanment ______________________________ (range not available)
Duty cycle iac(%)________________________________________ (range not available)
Engine load) __________________________________________ (range not available)
Engine load(v)___________________________________________ (range not available)
Engine load(actual)(nm) ________________________________ (range not available)
Engine load(before corr)(ms) ___________________________ (range not available)
Engine speed(rpm) _______________________________________ (range not available)
Engine speed(idle)(rpm)__________________________________ (range not available)
Fuel low ________________________________________________ (range not available)
Iac integrator __________________________________________ (range not available)
Idle speed(actual)(rpm) _________________________________ (range not available)
Idle speed switch closed ___________________________________ (range yes/no)
Ign rtd by knock(°)
Ign rtd by tcs-ecu(cold)(°) ______________________________ (range not available)
Ign rtd w/o knock & w/o isc(°)____________________________ (range not available)
Increased idle speed with ac on ____________________________ (range yes/no)
Injection time(ms) _______________________________________ (range not available)
Intake manifold pressure) ____________________________ (range not available)
Isc(reaction to malfunction) ___________________________ (range not available)
Knock ctrl(°) ____________________________________________ (range not available)
Learn injection time(ms)_________________________________ (range not available)
Learn range o idle
Learn value air mass idle) range see description)
Learn value idle speed(p/n) _____________________________ (range not available)
Learn value isc(at ind (range not available)
Learn value maf-sensor ________________________________ (range not available)
Learn value mixture(adaptive) __________________________ (range not available)
Learn value mixture(adp)(ms) ___________________________ (range not available)
Learn value mixture(canp act) _______________________ (range not available)
Learn value mixture corr ______________________________ (range not available)
Learn value mixture corr) ____________________________ (range not available)
Learn value mixture corr(ms) ___________________________ (range not available)
Learn value o2(actual)(bk1)(%)
Learn value o2(bk1)(%)
Learn value o2(full)
Learn value o2(idle)(%)
Learn value o2(idle)(ms) _________________________________ (range not available)
Learn value tps _________________________________________ (range not available)
Limited operation(limp) ______________________________________ (range yes/no)
Maf isc trim) __________________________________________ (range not available)
Map(%) ___________________________________________________ (range not available)
Map-controlled idle speed _____________________________ (range not available)
Mass air flow(v)_________________________________________ (range not available)
Mass air flow(desired)(g/s) ______________________________ (range not available)
Min value thr adjuster (range not available)
Mixture __________________________________________________ (range rich/lean)
Mixture correction _____________________________________ (range not available)
Mixture correction) __________________________________ (range not available)
Mode hall-reference signal ____________________________ (range not available)
O2 control mode _________________________________ (range active/not active)
O2 corr(canp activated) ______________________________ (range not available)
O2 ctrl & act(bank 1)(%)
O2 ctrl factor(bank 1)
O2 ctrl ready _______________________________________________ (range yes/no)
O2 loop closed (range yes/no)
Factory data name
O2 regulation active ________________________________________ (range yes/no)
O2 sensor(v)o2 sensor 1(v)
O2 sensor heater after cat _________________________________ (range on/off)
O2 value _________________________________________________ (range not available)
O2 value(actual)(%)
Part load detected _________________________________________ (range yes/no)
Relative air mass) _____________________________________ (range not available)
Retarding steps (range not available)
Secondary air mass(g/s) _________________________________ (range not available)
Slide valve sensor(min)(v) _______________________________ (range not available)
Start of delivery(desired)(°) ____________________________ (range not available)
Thr adj sensor, min lrn ok/exec_____________________________ (range yes/no)
Thr valve adjuster angle(v) ____________________________ (range not available)
Throttle valve adjuster(v) _____________________________ (range not available)
Throttle valve position) ______________________________ (range not available)
Time counter 2 __________________________________________ (range not available)
Torque(desired)(nm)_____________________________________ (range not available)
Torque reduction(nm)
Tps, min lrn ok/exec _________________________________________ (range yes/no)
Vehicle speed ctrl __________________________________ (range tacho/speedo)
Warm up cat) __________________________________________ (range not available)
Battery voltage below v __________________________________ (range yes/no)
Coolant temperature) _________________________________ (range not available)
Coolant tmp >70°c/or air temp >5°c __________________________ (range yes/no)
Fuel cons. aux heater(l/h) _______________________________ (range not available)
Glow time(s) _____________________________________________ (range not available)
Inj diff cyl 1 to 3(mg/s)
Inj quantity(driver)(mg/s)
Maf 2(mg/s)_______________________________________________ (range not available)
Mass air flow(desired)(ms/s)
Rel.heat low ________________________________________________ (range yes/no)
Start quantity(mg/s) ____________________________________ (range not available)
Actual selected gear ______________________________________ (range variable)
A/t___________________________________________________________ (range yes/no)
A/t output(rpm)____________________________________ (range 0 to maximum rpm)
Battery voltage _____________________________________ (range 9.0 to 16.0 volts)
Table 6-3 transmission input speedgear
Kickdown switch ____________________________________________ (range on/off)
Lock-up slip ________________________________________________ (range 0 to 99%)
Lock-up slip ________________________________________________ (range 0 to stall)
Required solenoid #4
Solenoid #1solenoid #2
Gearsv 1 (n88)
Sport factor) ___________________________________________ (range 0 to 100%)
Throttle valve position(v) range v to 4.680v)
Vehicle speed sensor(v)_________________________________ (range 2.20 to 2.52v)
Adaptation of start-from-stop behavior forward (range adp ok/running)
Gear selected range h to m +/–)
Torque converter slip speed (range 0 to stall speed)
Tcs switch __________________________________________________ (range on/off)
Note the following regarding communication problems with vw/audi vehicles:
The aftermarket radio problem
To test this problem without a voltmeter:
Figure b back of premium vi radioi
Additive for idle adaptation.•
C.1.3 examples of display groups for long term ft adaptive value
C.3 oxygen sensor voltage
Fuel control learning adaptation values
C.5.1 oxygen sensor aging test
Display group
Groupsensor
Cchecking for codes (test drive) coding and programmingvw 1996–99 mechanical keys 80d



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