Appendix J

Symbol index

Every Bosch engineering symbol with the German term it is built from, and the chapters that use it. The vocabulary is mined from the glossary, the calibration address map and the live RAM registry — 127 symbols in total.

Symbol, German expansion, meaning, and the chapters that use it
Symbol	German	Meaning	Chapters	Where
ARMIN	Antiruckeln Minimal	Anti-jerk closed-loop damping coordinator that suppresses driveline shudder via ignition timing retard.	6	02 03 32 40 55 59
ASR	Antriebsschlupfregelung	Traction control system; commands fast torque reduction via CAN when driven wheel slip is detected.	7	02 10 13 16 27 40 55
ATR	Abgastemperaturmodell	Physical mathematical model that calculates real-time exhaust gas temperature (`tabg_w`) without a thermocouple.	7	02 09 13 18 40 51 60
BTS	Bauteileschutz	Component protection thermal subsystem; enriches fueling to cool exhaust valves and turbine.	7	09 18 37 40 48 51 53
B_brems	Bedingung Bremsschalter	Boolean bit flag indicating that the brake pedal is depressed (`F47`/`F`).	4	14 23 40 59
B_kuppl	Bedingung Kupplungsschalter	Boolean bit flag indicating that the clutch pedal is depressed (`F36`).	6	14 23 40 54 58 59
B_lr	Bedingung Lambdaregelung	Boolean status flag indicating active closed-loop stoichiometric lambda control.	3	05 25 40
B_stend	Bedingung Startende	Engine running flag asserted after crank flare-up; unlocks full throttle authority.	2	10 40
CDATR	Codewort Diagnose Abgastemperaturregelung	Diagnostic codeword for the physical thermocouple EGT sensor.	4	02 05 09 40
CDHSH	Codewort Diagnose Heizung Sonde Hinten	Diagnostic codeword for the secondary rear oxygen sensor heater.	3	07 40 52
CDKAT	Codewort Diagnose Katalysator	Master diagnostic codeword for catalytic converter conversion efficiency.	5	05 06 07 40 52
CDLASH	Codewort Diagnose Lambda-Alterung Sonde Hinten	Diagnostic codeword for secondary oxygen sensor aging response.	2	07 40
CDLDP	Codewort Diagnose Leckdiagnosepumpe	Master diagnostic codeword for the fuel tank Leak Detection Pump (`V144`).	6	03 06 07 09 28 40
CDLMM	Codewort Diagnose Luftmassenmesser	Diagnostic codeword for the Mass Air Flow sensor (`G70`).	2	31 40
CDSLS	Codewort Diagnose Sekundärluftsystem	Master diagnostic codeword for the Secondary Air Injection system.	4	06 07 40 46
CDTES	Codewort Diagnose Tankentlüftungssystem	Diagnostic codeword for the EVAP canister purge flow monitor.	3	07 28 40
CDTHER	Codewort Diagnose Kennfeldthermostat	Diagnostic codeword for the electrically heated map thermostat (`F265`).	2	09 40
CWBLS	Codewort Bremslichtschalter	Configuration codeword governing brake-over-throttle power cut logic.	2	14 40
CWDLSAHK	Codewort Diagnose Lambdasonde Alterung nach Kat	Master codeword enabling rear O2 sensor surveillance.	4	03 06 07 40
CWNOMIL	Codewort Keine MIL-Anforderung	Master codeword enabling global suppression of the Check Engine Light.	2	07 40
CWSAWE	Codewort Schubabschneidung Weiterführung	Configuration codeword for auxiliary overrun fuel cut-off delay.	3	06 14 40
DFPM	Diagnosefehlerpfadmanager	Centralized 4-level diagnostic architecture managing fault classification and MIL triggers.	22	02 03 05 06 07 08 09 13 21 26 27 28 31 34 38 39 40 43 46 50 52 55
DK	Drosselklappe	The mechanical butterfly plate inside the electronic throttle body.	0
dkv_w	Drosselklappenwinkel	Physical angular position of the throttle plate (0.0° to 82.0°).	4	12 25 31 40
DLBTS	Delta Bauteileschutz	Transient delta step fuel enrichment applied when entering component protection.	3	18 40 51
DMLLR	Dynamische Momentenbegrenzung Leerlaufregler	Dynamic airflow reserve for idle speed stability.	4	16 32 40 41
DPOVE	Diagnose Plausibilität Offset Voltage Einlass	Lower diagnostic plausibility voltage limit for the MAP sensor.	3	03 06 40
DPUVE	Diagnose Plausibilität Upper Voltage Einlass	Upper diagnostic plausibility voltage limit for the MAP sensor.	3	03 06 40
DSLGRAD	Drucksensor Linearer Gradient	MAP sensor conversion slope in hPa/V.	4	03 06 13 40
DSLOFS	Drucksensor Linearer Offset	MAP sensor pressure intercept offset at 0.0V in hPa.	4	03 06 13 40
DVE	Drosselklappe Elektronisch	Complete closed-loop electronic throttle control system (Drive-by-Wire / E-Gas).	5	22 25 32 40 57
DWKREC	Delta Winkel Klopfen Recovery	Ignition advance recovery ramp rate following a knock retard event.	2	18 40
dwkrz_0..3	Delta Winkel Klopfen Zylinder 1..4	Real-time individual cylinder knock retard angles (°KW).	1	40
DWKSTE	Delta Winkel Klopfen Stufe	Immediate ignition retard step applied upon detecting knock (typically -3.0°).	2	18 40
ELAUF	Eingriffsuntergrenze Antiruckeln	Lower engine speed threshold for anti-jerk regulator activation.	2	32 40
ESKONF	Endstufenkonfiguration	7-byte hardware output driver mask controlling electrical pin monitoring.	14	06 07 09 11 14 27 28 40 43 44 45 46 49 52
FAW	Faktor Abklingung Warmstart	After-start fuel decay multiplier during engine flare-up.	5	05 21 40 46 53
FDLD	Faktor Differential Ladedruck	Derivative damping coefficient for turbocharger boost control.	2	32 40
FKKVS	Korrekturfaktor Kraftstoffversorgung	Fuel injector individual cylinder pulsation correction matrix.	2	06 40
FKST	Faktor Kraftstoff Start	Auxiliary coolant temperature multiplier applied during cold cranking.	2	21 40
fra_w	Faktor Regelung Adaptiv	Multiplicative long-term fuel trim (LTFT under partial-throttle load).	6	10 12 25 31 40 60
FRLFN	Füllung Relative Normiert	3D volumetric efficiency matrix used for Speed Density / Alpha-N calculation.	3	31 40 56
fr_w	Faktor Regelung	Short-term lambda controller trim value (λ = 1.00 ± trim).	4	12 21 31 40
FST	Faktor Start	Primary cranking fuel enrichment curve plotted against coolant temperature.	4	21 40 46 53
FTBR	Faktor Temperatur Brennraum	Intake air density correction factor inversely proportional to absolute temp (K).	2	31 40
G186	Drosselklappenantrieb	Bidirectional DC electric servo motor inside the electronic throttle body.	13	10 16 22 33 34 40 41 53 54 55 57 59 60
G235	Abgastemperaturgeber 1	Thermocouple exhaust gas temperature sensor used on Audi TT 225 BAM.	6	02 05 09 13 40 51
G28	Geber für Motordrehzahl	The primary 60-2 variable reluctance crankshaft speed and position sensor.	14	02 05 10 13 25 32 36 39 40 41 50 55 56 58
G31	Ladedrucksensor	Manifold absolute pressure (MAP) sensor located on the intercooler or charge pipe.	5	03 13 17 31 40
G40	Hallgeber	Camshaft position Hall sensor mounted to the front of the intake camshaft.	5	02 10 25 36 40
G42	Ansauglufttemperatursensor	Intake air temperature (IAT) thermistor.	5	03 13 25 31 40
G61	Klopf-Sensor 1	Piezoelectric knock sensor monitoring cylinders 1 and 2.	7	02 13 18 25 37 39 40
G62	Kühlmitteltemperaturgeber	Dual-circuit engine coolant temperature (ECT) sensor.	4	13 25 40 53
G66	Klopf-Sensor 2	Piezoelectric knock sensor monitoring cylinders 3 and 4.	7	02 13 18 25 37 39 40
G70	Luftmassenmesser	Hot-film anemometer mass air flow (MAF) sensor.	3	25 40 46
gangi	Gang Istwert	Currently engaged transmission gear index (0 = Neutral, 1… 6 = Gears).	6	03 12 13 32 40 58
GRA	Geschwindigkeitsregelanlage	Factory cruise control system.	4	16 40 54 59
J104	Steuergerät für ABS/ESP	Electronic stability control module communicating over Drivetrain CAN.	6	02 09 13 23 27 40
J17	Kraftstoffpumpenrelais	Main fuel pump power relay switched to ground by ECU Pin 65.	6	02 07 13 34 40 56
J217	Steuergerät für Automatikgetriebe	Automatic / Tiptronic transmission control module (TCM).	2	33 40
J220	Steuergerät für Motronic	Bosch Motronic ME7.5 Engine Control Module (ECM).	4	10 23 33 40
J271	Stromversorgungsrelais Motronic	Master ECU power supply relay (Terminal 30 to Terminal 87).	3	13 25 40
J285	Steuergerät im Schalttafeleinsatz	Instrument cluster and CAN gateway module.	6	02 10 13 23 40 53
J293	Lüftersteuergerät	Electronic radiator cooling fan control module.	4	09 13 40 53
J299	Relais für Sekundärluftpumpe	High-current relay driving the electric secondary air injection pump.	7	02 07 09 21 34 40 46
KFFDLGO	Kennfeld Dämpfungsgrad Antiruckelfunktion	3D map setting anti-jerk damping coefficients.	5	03 06 32 40 55
KFLBTS	Kennfeld Bauteileschutz	3D map defining target rich air-fuel ratio when component protection activates.	4	06 14 18 40
KFLDHBN	Kennfeld Ladedruck Höchstgrenze	Maximum allowable absolute boost pressure diagnostic ceiling (hPa).	6	03 06 17 40 45 48
KFLDIMX	Kennfeld Ladedruck Integral Maximal	Maximum dynamic integral ceiling for boost control PID.	5	06 17 25 38 40
KFLDRL	Kennfeld Ladedruckregelung Linearisiert	Open-loop feedforward wastegate duty cycle linearization table.	5	06 17 25 38 40
KFLDRQ	Kennfeld Ladedruckregelung Deaktivierungsschwelle	Integral deactivation threshold for boost PID.	3	06 17 40
KFLF	Kennfeld Lambdasoll Grundwert	Base target lambda engine volumetric filling map.	5	02 06 15 25 40
KFMIOP	Kennfeld Motormoment Optimal	3D map translating engine load (rl) into actual indicated torque.	8	03 06 11 16 25 40 44 45
KFMIRL	Kennfeld Sollfüllung	3D map translating target indicated torque into target cylinder load (rlsol).	11	02 03 06 11 16 25 40 44 45 48 56
KFPED	Kennfeld Fahrpedal	3D map translating accelerator pedal position into driver requested torque.	6	03 06 11 16 22 40
KFTVSA	Kennfeld Verzögerungszeit Schubabschaltung	Overrun fuel cut-off delay time curve (seconds).	4	03 06 14 40
KFZW	Kennfeld Zündwinkel	Base ignition advance timing map active with camshaft retarded (0°).	15	03 05 06 11 14 19 24 25 30 31 40 44 45 46 60
KFZW2	Kennfeld Zündwinkel 2	Alternate ignition advance timing map active with camshaft advanced (22°).	6	03 06 11 19 40 45
KFZWOP	Kennfeld Zündwinkel Optimal	Maximum Brake Torque (MBT) optimal ignition timing surface.	2	06 40
KFZWTVS	Kennfeld Zündwinkel bei Katalysatorheizen	Ignition timing map during catalyst warm-up and overrun.	5	03 06 14 21 40
KPDVE	Proportionalbeiwert DVE	Proportional gain constant for the electronic throttle servo motor loop.	2	22 40
KRKTE	Konstante Relative Kraftstoffmenge	Primary conversion factor translating load percentage into fuel pulse (ms/%).	13	06 11 15 21 24 31 40 42 45 49 56 57 60
KRMX	Kennfeld Referenzpegel Klopfen	Reference background acoustic noise floor for knock detection.	3	18 37 40
LAMFA	Lambda Fahrerwunsch	Driver requested enrichment lambda map indexed against engine speed and torque.	10	02 03 06 11 14 25 31 40 45 51
lamsbg_w	Lambdasollwert Begrenzt	Final arbitrated target lambda currently commanded by the ECU.	3	12 40 60
lamsoni_w	Lambdasoll Istwert	Real-time measured air-fuel ratio from the wideband LSU 4.2 sensor.	6	12 26 31 35 40 60
LDR	Ladedruckregelung	Complete closed-loop turbocharger charge air pressure control subsystem.	6	17 25 38 40 48 58
LDRXN	Höchstgrenze Füllung Normal	Maximum specified cylinder air filling ceiling (static boost limit).	13	03 06 11 14 16 17 24 25 30 40 45 48 58
LDRXNZ	Höchstgrenze Füllung Gangabhängig	Maximum specified cylinder air filling ceiling indexed per gear.	5	03 06 17 40 58
ldtv	Ladedruck Tastverhältnis	Final pulse-width modulated duty cycle command sent to wastegate valve `N75`.	4	12 17 35 40
mibas	Basismotormoment	Base indicating engine torque calculation before external intervention.	1	40
mifa	Fahrermoment	Raw driver requested engine torque derived directly from pedal position.	4	14 16 23 40
miist	Motormoment Istwert	Real-time actual indicated engine torque currently generated by combustion.	3	23 40 43
misolv	Motormoment Sollwert Verzögert	Slow-path target indicated torque arbitrated across all vehicle controllers.	2	16 40
MLHFM	Massenstrom Heißfilmluftmassenmesser	512-point calibration linearization curve for the MAF sensor.	4	06 11 15 40
MLOFS	Massenstrom Offset	Quiescent zero-flow voltage offset constant for the MAF sensor.	3	06 15 40
MSR	Motorschleppmomentregelung	Engine drag torque control; prevents drive-wheel skid during downshifts.	5	02 16 33 40 55
N112	Sekundärlufteinblasventil	Vacuum solenoid valve actuating the secondary air injection combivalve.	7	02 07 13 21 34 40 46
N205	Ventil 1 für Nockenwellenverstellung	Hydraulic solenoid controlling intake camshaft advance.	10	02 05 07 13 19 25 34 39 40 44
N249	Umluftventil Turbolader	Electro-pneumatic solenoid valve actuating the diverter bypass valve.	13	02 05 07 13 27 28 34 39 40 46 50 52 59
N75	Ladedruckregelventil	3-port pulse-width modulated frequency solenoid controlling the wastegate actuator.	13	02 05 07 12 13 16 17 25 34 38 39 40 60
N80	Magnetventil 1 für Aktivkohlebehälter	EVAP canister regenerative purge solenoid valve.	13	02 03 07 09 13 15 28 34 40 49 55 57 60
NMAX	Höchstdrehzahl	Main calibrated engine speed governor / rev limiter ceiling.	5	06 14 36 40 45
nmot_w	Motordrehzahl	Live crankshaft rotational speed (RPM).	15	02 05 12 14 16 23 25 31 32 35 37 40 54 55 60
NWST	Nockenwellensteuerung	Variable valve timing subsystem controlling intake camshaft advance.	4	19 40 44 47
plsol	Ladedruck Sollwert	Target absolute boost pressure commanded by the torque manager (hPa).	3	12 35 40
pvdks_w	Druck vor Drosselklappe	Charge air absolute pressure measured in the intercooler pipe by MAP sensor `G31`.	6	12 30 31 35 40 42
pvds_w	Druck im Saugrohr	Intake manifold absolute pressure calculated downstream of the throttle plate.	3	12 40 60
rkadd_w	Relative Kraftstoffmenge Additiv	Additive idle fuel trim adaptation offset (LTFT at idle).	3	10 12 40
rl_w	Relative Luftfüllung	Actual relative cylinder air charge (100% = Stoichiometric swept cylinder mass).	8	02 12 30 31 35 40 55 60
SLS	Sekundärluftsystem	Secondary Air Injection emissions subsystem.	3	21 40 46
TABGBTS	Temperaturschwelle Bauteileschutz	Exhaust gas temperature threshold triggering BTS enrichment (typically 950°C).	8	02 05 06 09 14 18 40 51
tabg_w	Abgastemperatur	Modeled exhaust gas temperature calculated in real time by the ATR model (°C).	7	02 12 13 18 40 51 60
tans	Ansauglufttemperatur	Intake air temperature measured by thermistor `G42` (°C).	4	12 25 31 40
TEMIN	Minimale Einspritzzeit	Minimum allowable effective fuel injector opening duration (ms).	6	06 15 21 40 45 56
TEMINVA	Minimale Einspritzzeit Ventilüberschneidung	Minimum allowable injection duration during valve overlap.	3	06 15 40
ti_b1	Einspritzzeit Bank 1	Real-time effective fuel injection duration commanded to fuel injectors (ms).	4	12 31 40 55
tmot	Kühlmitteltemperatur	Engine coolant temperature measured by sensor `G62` (°C).	7	12 21 23 35 40 41 42
TVUB	Totzeit Vorsteuerung Unverzögert Batterie	Fuel injector latency dead time compensation curve vs. voltage.	7	06 15 40 45 49 56 57
V144	Pumpe für Kraftstoffsystemdichtigkeit	Vacuum-driven evaporative Leak Detection Pump (LDP).	7	03 07 09 13 28 34 40
vfzg_w	Fahrzeuggeschwindigkeit	Live vehicle road speed measured via transmission Hall sensor `G22` or CAN (km/h).	5	05 09 23 40 54
WDKUGDN	Winkel Drosselklappe Untere Grenze Dynamisch	Minimum throttle plate angle threshold during deceleration.	4	06 14 22 40
WFS	Wegfahrsperre	Factory anti-theft immobilizer subsystem (WFS2 / WFS3).	1	40
wped_w	Fahrpedalwinkel	Driver accelerator pedal position percentage (0.0%… 100.0%).	9	12 14 16 25 27 40 54 59 60
Z19	Heizung für Lambdasonde 1	Front wideband oxygen sensor internal ceramic heating element.	5	07 13 21 26 40
Z28	Heizung für Lambdasonde 2	Rear secondary oxygen sensor internal heating element.	3	07 13 40
zwist	Zündwinkel Istwert	Final actual ignition advance currently being commanded to the spark plugs (°BTDC).	7	12 14 33 35 40 55 60

ARMIN

German: Antiruckeln Minimal
Meaning: Anti-jerk closed-loop damping coordinator that suppresses driveline shudder via ignition timing retard.
Chapters: 02, 03, 32, 40, 55, 59

ASR

German: Antriebsschlupfregelung
Meaning: Traction control system; commands fast torque reduction via CAN when driven wheel slip is detected.
Chapters: 02, 10, 13, 16, 27, 40, 55

ATR

German: Abgastemperaturmodell
Meaning: Physical mathematical model that calculates real-time exhaust gas temperature (tabg_w) without a thermocouple.
Chapters: 02, 09, 13, 18, 40, 51, 60

BTS

German: Bauteileschutz
Meaning: Component protection thermal subsystem; enriches fueling to cool exhaust valves and turbine.
Chapters: 09, 18, 37, 40, 48, 51, 53

B_brems

German: Bedingung Bremsschalter
Meaning: Boolean bit flag indicating that the brake pedal is depressed (F47/F).
Chapters: 14, 23, 40, 59

B_kuppl

German: Bedingung Kupplungsschalter
Meaning: Boolean bit flag indicating that the clutch pedal is depressed (F36).
Chapters: 14, 23, 40, 54, 58, 59

B_lr

German: Bedingung Lambdaregelung
Meaning: Boolean status flag indicating active closed-loop stoichiometric lambda control.
Chapters: 05, 25, 40

B_stend

German: Bedingung Startende
Meaning: Engine running flag asserted after crank flare-up; unlocks full throttle authority.
Chapters: 10, 40

CDATR

German: Codewort Diagnose Abgastemperaturregelung
Meaning: Diagnostic codeword for the physical thermocouple EGT sensor.
Chapters: 02, 05, 09, 40

CDHSH

German: Codewort Diagnose Heizung Sonde Hinten
Meaning: Diagnostic codeword for the secondary rear oxygen sensor heater.
Chapters: 07, 40, 52

CDKAT

German: Codewort Diagnose Katalysator
Meaning: Master diagnostic codeword for catalytic converter conversion efficiency.
Chapters: 05, 06, 07, 40, 52

CDLASH

German: Codewort Diagnose Lambda-Alterung Sonde Hinten
Meaning: Diagnostic codeword for secondary oxygen sensor aging response.
Chapters: 07, 40

CDLDP

German: Codewort Diagnose Leckdiagnosepumpe
Meaning: Master diagnostic codeword for the fuel tank Leak Detection Pump (V144).
Chapters: 03, 06, 07, 09, 28, 40

CDLMM

German: Codewort Diagnose Luftmassenmesser
Meaning: Diagnostic codeword for the Mass Air Flow sensor (G70).
Chapters: 31, 40

CDSLS

German: Codewort Diagnose Sekundärluftsystem
Meaning: Master diagnostic codeword for the Secondary Air Injection system.
Chapters: 06, 07, 40, 46

CDTES

German: Codewort Diagnose Tankentlüftungssystem
Meaning: Diagnostic codeword for the EVAP canister purge flow monitor.
Chapters: 07, 28, 40

CDTHER

German: Codewort Diagnose Kennfeldthermostat
Meaning: Diagnostic codeword for the electrically heated map thermostat (F265).
Chapters: 09, 40

CWBLS

German: Codewort Bremslichtschalter
Meaning: Configuration codeword governing brake-over-throttle power cut logic.
Chapters: 14, 40

CWDLSAHK

German: Codewort Diagnose Lambdasonde Alterung nach Kat
Meaning: Master codeword enabling rear O2 sensor surveillance.
Chapters: 03, 06, 07, 40

CWNOMIL

German: Codewort Keine MIL-Anforderung
Meaning: Master codeword enabling global suppression of the Check Engine Light.
Chapters: 07, 40

CWSAWE

German: Codewort Schubabschneidung Weiterführung
Meaning: Configuration codeword for auxiliary overrun fuel cut-off delay.
Chapters: 06, 14, 40

DFPM

German: Diagnosefehlerpfadmanager
Meaning: Centralized 4-level diagnostic architecture managing fault classification and MIL triggers.
Chapters: 02, 03, 05, 06, 07, 08, 09, 13, 21, 26, 27, 28, 31, 34, 38, 39, 40, 43, 46, 50, 52, 55

German: Drosselklappe
Meaning: The mechanical butterfly plate inside the electronic throttle body.
Chapters: —

dkv_w

German: Drosselklappenwinkel
Meaning: Physical angular position of the throttle plate (0.0° to 82.0°).
Chapters: 12, 25, 31, 40

DLBTS

German: Delta Bauteileschutz
Meaning: Transient delta step fuel enrichment applied when entering component protection.
Chapters: 18, 40, 51

DMLLR

German: Dynamische Momentenbegrenzung Leerlaufregler
Meaning: Dynamic airflow reserve for idle speed stability.
Chapters: 16, 32, 40, 41

DPOVE

German: Diagnose Plausibilität Offset Voltage Einlass
Meaning: Lower diagnostic plausibility voltage limit for the MAP sensor.
Chapters: 03, 06, 40

DPUVE

German: Diagnose Plausibilität Upper Voltage Einlass
Meaning: Upper diagnostic plausibility voltage limit for the MAP sensor.
Chapters: 03, 06, 40

DSLGRAD

German: Drucksensor Linearer Gradient
Meaning: MAP sensor conversion slope in hPa/V.
Chapters: 03, 06, 13, 40

DSLOFS

German: Drucksensor Linearer Offset
Meaning: MAP sensor pressure intercept offset at 0.0V in hPa.
Chapters: 03, 06, 13, 40

DVE

German: Drosselklappe Elektronisch
Meaning: Complete closed-loop electronic throttle control system (Drive-by-Wire / E-Gas).
Chapters: 22, 25, 32, 40, 57

DWKREC

German: Delta Winkel Klopfen Recovery
Meaning: Ignition advance recovery ramp rate following a knock retard event.
Chapters: 18, 40

dwkrz_0..3

German: Delta Winkel Klopfen Zylinder 1..4
Meaning: Real-time individual cylinder knock retard angles (°KW).
Chapters: 40

DWKSTE

German: Delta Winkel Klopfen Stufe
Meaning: Immediate ignition retard step applied upon detecting knock (typically -3.0°).
Chapters: 18, 40

ELAUF

German: Eingriffsuntergrenze Antiruckeln
Meaning: Lower engine speed threshold for anti-jerk regulator activation.
Chapters: 32, 40

ESKONF

German: Endstufenkonfiguration
Meaning: 7-byte hardware output driver mask controlling electrical pin monitoring.
Chapters: 06, 07, 09, 11, 14, 27, 28, 40, 43, 44, 45, 46, 49, 52

FAW

German: Faktor Abklingung Warmstart
Meaning: After-start fuel decay multiplier during engine flare-up.
Chapters: 05, 21, 40, 46, 53

FDLD

German: Faktor Differential Ladedruck
Meaning: Derivative damping coefficient for turbocharger boost control.
Chapters: 32, 40

FKKVS

German: Korrekturfaktor Kraftstoffversorgung
Meaning: Fuel injector individual cylinder pulsation correction matrix.
Chapters: 06, 40

FKST

German: Faktor Kraftstoff Start
Meaning: Auxiliary coolant temperature multiplier applied during cold cranking.
Chapters: 21, 40

fra_w

German: Faktor Regelung Adaptiv
Meaning: Multiplicative long-term fuel trim (LTFT under partial-throttle load).
Chapters: 10, 12, 25, 31, 40, 60

FRLFN

German: Füllung Relative Normiert
Meaning: 3D volumetric efficiency matrix used for Speed Density / Alpha-N calculation.
Chapters: 31, 40, 56

fr_w

German: Faktor Regelung
Meaning: Short-term lambda controller trim value (λ = 1.00 ± trim).
Chapters: 12, 21, 31, 40

FST

German: Faktor Start
Meaning: Primary cranking fuel enrichment curve plotted against coolant temperature.
Chapters: 21, 40, 46, 53

FTBR

German: Faktor Temperatur Brennraum
Meaning: Intake air density correction factor inversely proportional to absolute temp (K).
Chapters: 31, 40

G186

German: Drosselklappenantrieb
Meaning: Bidirectional DC electric servo motor inside the electronic throttle body.
Chapters: 10, 16, 22, 33, 34, 40, 41, 53, 54, 55, 57, 59, 60

G235

German: Abgastemperaturgeber 1
Meaning: Thermocouple exhaust gas temperature sensor used on Audi TT 225 BAM.
Chapters: 02, 05, 09, 13, 40, 51

G28

German: Geber für Motordrehzahl
Meaning: The primary 60-2 variable reluctance crankshaft speed and position sensor.
Chapters: 02, 05, 10, 13, 25, 32, 36, 39, 40, 41, 50, 55, 56, 58

G31

German: Ladedrucksensor
Meaning: Manifold absolute pressure (MAP) sensor located on the intercooler or charge pipe.
Chapters: 03, 13, 17, 31, 40

G40

German: Hallgeber
Meaning: Camshaft position Hall sensor mounted to the front of the intake camshaft.
Chapters: 02, 10, 25, 36, 40

G42

German: Ansauglufttemperatursensor
Meaning: Intake air temperature (IAT) thermistor.
Chapters: 03, 13, 25, 31, 40

G61

German: Klopf-Sensor 1
Meaning: Piezoelectric knock sensor monitoring cylinders 1 and 2.
Chapters: 02, 13, 18, 25, 37, 39, 40

G62

German: Kühlmitteltemperaturgeber
Meaning: Dual-circuit engine coolant temperature (ECT) sensor.
Chapters: 13, 25, 40, 53

G66

German: Klopf-Sensor 2
Meaning: Piezoelectric knock sensor monitoring cylinders 3 and 4.
Chapters: 02, 13, 18, 25, 37, 39, 40

G70

German: Luftmassenmesser
Meaning: Hot-film anemometer mass air flow (MAF) sensor.
Chapters: 25, 40, 46

gangi

German: Gang Istwert
Meaning: Currently engaged transmission gear index (0 = Neutral, 1… 6 = Gears).
Chapters: 03, 12, 13, 32, 40, 58

GRA

German: Geschwindigkeitsregelanlage
Meaning: Factory cruise control system.
Chapters: 16, 40, 54, 59

J104

German: Steuergerät für ABS/ESP
Meaning: Electronic stability control module communicating over Drivetrain CAN.
Chapters: 02, 09, 13, 23, 27, 40

J17

German: Kraftstoffpumpenrelais
Meaning: Main fuel pump power relay switched to ground by ECU Pin 65.
Chapters: 02, 07, 13, 34, 40, 56

J217

German: Steuergerät für Automatikgetriebe
Meaning: Automatic / Tiptronic transmission control module (TCM).
Chapters: 33, 40

J220

German: Steuergerät für Motronic
Meaning: Bosch Motronic ME7.5 Engine Control Module (ECM).
Chapters: 10, 23, 33, 40

J271

German: Stromversorgungsrelais Motronic
Meaning: Master ECU power supply relay (Terminal 30 to Terminal 87).
Chapters: 13, 25, 40

J285

German: Steuergerät im Schalttafeleinsatz
Meaning: Instrument cluster and CAN gateway module.
Chapters: 02, 10, 13, 23, 40, 53

J293

German: Lüftersteuergerät
Meaning: Electronic radiator cooling fan control module.
Chapters: 09, 13, 40, 53

J299

German: Relais für Sekundärluftpumpe
Meaning: High-current relay driving the electric secondary air injection pump.
Chapters: 02, 07, 09, 21, 34, 40, 46

KFFDLGO

German: Kennfeld Dämpfungsgrad Antiruckelfunktion
Meaning: 3D map setting anti-jerk damping coefficients.
Chapters: 03, 06, 32, 40, 55

KFLBTS

German: Kennfeld Bauteileschutz
Meaning: 3D map defining target rich air-fuel ratio when component protection activates.
Chapters: 06, 14, 18, 40

KFLDHBN

German: Kennfeld Ladedruck Höchstgrenze
Meaning: Maximum allowable absolute boost pressure diagnostic ceiling (hPa).
Chapters: 03, 06, 17, 40, 45, 48

KFLDIMX

German: Kennfeld Ladedruck Integral Maximal
Meaning: Maximum dynamic integral ceiling for boost control PID.
Chapters: 06, 17, 25, 38, 40

KFLDRL

German: Kennfeld Ladedruckregelung Linearisiert
Meaning: Open-loop feedforward wastegate duty cycle linearization table.
Chapters: 06, 17, 25, 38, 40

KFLDRQ

German: Kennfeld Ladedruckregelung Deaktivierungsschwelle
Meaning: Integral deactivation threshold for boost PID.
Chapters: 06, 17, 40

KFLF

German: Kennfeld Lambdasoll Grundwert
Meaning: Base target lambda engine volumetric filling map.
Chapters: 02, 06, 15, 25, 40

KFMIOP

German: Kennfeld Motormoment Optimal
Meaning: 3D map translating engine load (rl) into actual indicated torque.
Chapters: 03, 06, 11, 16, 25, 40, 44, 45

KFMIRL

German: Kennfeld Sollfüllung
Meaning: 3D map translating target indicated torque into target cylinder load (rlsol).
Chapters: 02, 03, 06, 11, 16, 25, 40, 44, 45, 48, 56

KFPED

German: Kennfeld Fahrpedal
Meaning: 3D map translating accelerator pedal position into driver requested torque.
Chapters: 03, 06, 11, 16, 22, 40

KFTVSA

German: Kennfeld Verzögerungszeit Schubabschaltung
Meaning: Overrun fuel cut-off delay time curve (seconds).
Chapters: 03, 06, 14, 40

KFZW

German: Kennfeld Zündwinkel
Meaning: Base ignition advance timing map active with camshaft retarded (0°).
Chapters: 03, 05, 06, 11, 14, 19, 24, 25, 30, 31, 40, 44, 45, 46, 60

KFZW2

German: Kennfeld Zündwinkel 2
Meaning: Alternate ignition advance timing map active with camshaft advanced (22°).
Chapters: 03, 06, 11, 19, 40, 45

KFZWOP

German: Kennfeld Zündwinkel Optimal
Meaning: Maximum Brake Torque (MBT) optimal ignition timing surface.
Chapters: 06, 40

KFZWTVS

German: Kennfeld Zündwinkel bei Katalysatorheizen
Meaning: Ignition timing map during catalyst warm-up and overrun.
Chapters: 03, 06, 14, 21, 40

KPDVE

German: Proportionalbeiwert DVE
Meaning: Proportional gain constant for the electronic throttle servo motor loop.
Chapters: 22, 40

KRKTE

German: Konstante Relative Kraftstoffmenge
Meaning: Primary conversion factor translating load percentage into fuel pulse (ms/%).
Chapters: 06, 11, 15, 21, 24, 31, 40, 42, 45, 49, 56, 57, 60

KRMX

German: Kennfeld Referenzpegel Klopfen
Meaning: Reference background acoustic noise floor for knock detection.
Chapters: 18, 37, 40

LAMFA

German: Lambda Fahrerwunsch
Meaning: Driver requested enrichment lambda map indexed against engine speed and torque.
Chapters: 02, 03, 06, 11, 14, 25, 31, 40, 45, 51

lamsbg_w

German: Lambdasollwert Begrenzt
Meaning: Final arbitrated target lambda currently commanded by the ECU.
Chapters: 12, 40, 60

lamsoni_w

German: Lambdasoll Istwert
Meaning: Real-time measured air-fuel ratio from the wideband LSU 4.2 sensor.
Chapters: 12, 26, 31, 35, 40, 60

LDR

German: Ladedruckregelung
Meaning: Complete closed-loop turbocharger charge air pressure control subsystem.
Chapters: 17, 25, 38, 40, 48, 58

LDRXN

German: Höchstgrenze Füllung Normal
Meaning: Maximum specified cylinder air filling ceiling (static boost limit).
Chapters: 03, 06, 11, 14, 16, 17, 24, 25, 30, 40, 45, 48, 58

LDRXNZ

German: Höchstgrenze Füllung Gangabhängig
Meaning: Maximum specified cylinder air filling ceiling indexed per gear.
Chapters: 03, 06, 17, 40, 58

ldtv

German: Ladedruck Tastverhältnis
Meaning: Final pulse-width modulated duty cycle command sent to wastegate valve N75.
Chapters: 12, 17, 35, 40

mibas

German: Basismotormoment
Meaning: Base indicating engine torque calculation before external intervention.
Chapters: 40

mifa

German: Fahrermoment
Meaning: Raw driver requested engine torque derived directly from pedal position.
Chapters: 14, 16, 23, 40

miist

German: Motormoment Istwert
Meaning: Real-time actual indicated engine torque currently generated by combustion.
Chapters: 23, 40, 43

misolv

German: Motormoment Sollwert Verzögert
Meaning: Slow-path target indicated torque arbitrated across all vehicle controllers.
Chapters: 16, 40

MLHFM

German: Massenstrom Heißfilmluftmassenmesser
Meaning: 512-point calibration linearization curve for the MAF sensor.
Chapters: 06, 11, 15, 40

MLOFS

German: Massenstrom Offset
Meaning: Quiescent zero-flow voltage offset constant for the MAF sensor.
Chapters: 06, 15, 40

MSR

German: Motorschleppmomentregelung
Meaning: Engine drag torque control; prevents drive-wheel skid during downshifts.
Chapters: 02, 16, 33, 40, 55

N112

German: Sekundärlufteinblasventil
Meaning: Vacuum solenoid valve actuating the secondary air injection combivalve.
Chapters: 02, 07, 13, 21, 34, 40, 46

N205

German: Ventil 1 für Nockenwellenverstellung
Meaning: Hydraulic solenoid controlling intake camshaft advance.
Chapters: 02, 05, 07, 13, 19, 25, 34, 39, 40, 44

N249

German: Umluftventil Turbolader
Meaning: Electro-pneumatic solenoid valve actuating the diverter bypass valve.
Chapters: 02, 05, 07, 13, 27, 28, 34, 39, 40, 46, 50, 52, 59

N75

German: Ladedruckregelventil
Meaning: 3-port pulse-width modulated frequency solenoid controlling the wastegate actuator.
Chapters: 02, 05, 07, 12, 13, 16, 17, 25, 34, 38, 39, 40, 60

N80

German: Magnetventil 1 für Aktivkohlebehälter
Meaning: EVAP canister regenerative purge solenoid valve.
Chapters: 02, 03, 07, 09, 13, 15, 28, 34, 40, 49, 55, 57, 60

NMAX

German: Höchstdrehzahl
Meaning: Main calibrated engine speed governor / rev limiter ceiling.
Chapters: 06, 14, 36, 40, 45

nmot_w

German: Motordrehzahl
Meaning: Live crankshaft rotational speed (RPM).
Chapters: 02, 05, 12, 14, 16, 23, 25, 31, 32, 35, 37, 40, 54, 55, 60

NWST

German: Nockenwellensteuerung
Meaning: Variable valve timing subsystem controlling intake camshaft advance.
Chapters: 19, 40, 44, 47

plsol

German: Ladedruck Sollwert
Meaning: Target absolute boost pressure commanded by the torque manager (hPa).
Chapters: 12, 35, 40

pvdks_w

German: Druck vor Drosselklappe
Meaning: Charge air absolute pressure measured in the intercooler pipe by MAP sensor G31.
Chapters: 12, 30, 31, 35, 40, 42

pvds_w

German: Druck im Saugrohr
Meaning: Intake manifold absolute pressure calculated downstream of the throttle plate.
Chapters: 12, 40, 60

rkadd_w

German: Relative Kraftstoffmenge Additiv
Meaning: Additive idle fuel trim adaptation offset (LTFT at idle).
Chapters: 10, 12, 40

rl_w

German: Relative Luftfüllung
Meaning: Actual relative cylinder air charge (100% = Stoichiometric swept cylinder mass).
Chapters: 02, 12, 30, 31, 35, 40, 55, 60

SLS

German: Sekundärluftsystem
Meaning: Secondary Air Injection emissions subsystem.
Chapters: 21, 40, 46

TABGBTS

German: Temperaturschwelle Bauteileschutz
Meaning: Exhaust gas temperature threshold triggering BTS enrichment (typically 950°C).
Chapters: 02, 05, 06, 09, 14, 18, 40, 51

tabg_w

German: Abgastemperatur
Meaning: Modeled exhaust gas temperature calculated in real time by the ATR model (°C).
Chapters: 02, 12, 13, 18, 40, 51, 60

tans

German: Ansauglufttemperatur
Meaning: Intake air temperature measured by thermistor G42 (°C).
Chapters: 12, 25, 31, 40

TEMIN

German: Minimale Einspritzzeit
Meaning: Minimum allowable effective fuel injector opening duration (ms).
Chapters: 06, 15, 21, 40, 45, 56

TEMINVA

German: Minimale Einspritzzeit Ventilüberschneidung
Meaning: Minimum allowable injection duration during valve overlap.
Chapters: 06, 15, 40

ti_b1

German: Einspritzzeit Bank 1
Meaning: Real-time effective fuel injection duration commanded to fuel injectors (ms).
Chapters: 12, 31, 40, 55

tmot

German: Kühlmitteltemperatur
Meaning: Engine coolant temperature measured by sensor G62 (°C).
Chapters: 12, 21, 23, 35, 40, 41, 42

TVUB

German: Totzeit Vorsteuerung Unverzögert Batterie
Meaning: Fuel injector latency dead time compensation curve vs. voltage.
Chapters: 06, 15, 40, 45, 49, 56, 57

V144

German: Pumpe für Kraftstoffsystemdichtigkeit
Meaning: Vacuum-driven evaporative Leak Detection Pump (LDP).
Chapters: 03, 07, 09, 13, 28, 34, 40

vfzg_w

German: Fahrzeuggeschwindigkeit
Meaning: Live vehicle road speed measured via transmission Hall sensor G22 or CAN (km/h).
Chapters: 05, 09, 23, 40, 54

WDKUGDN

German: Winkel Drosselklappe Untere Grenze Dynamisch
Meaning: Minimum throttle plate angle threshold during deceleration.
Chapters: 06, 14, 22, 40

WFS

German: Wegfahrsperre
Meaning: Factory anti-theft immobilizer subsystem (WFS2 / WFS3).
Chapters: 40

wped_w

German: Fahrpedalwinkel
Meaning: Driver accelerator pedal position percentage (0.0%… 100.0%).
Chapters: 12, 14, 16, 25, 27, 40, 54, 59, 60

Z19

German: Heizung für Lambdasonde 1
Meaning: Front wideband oxygen sensor internal ceramic heating element.
Chapters: 07, 13, 21, 26, 40

Z28

German: Heizung für Lambdasonde 2
Meaning: Rear secondary oxygen sensor internal heating element.
Chapters: 07, 13, 40

zwist

German: Zündwinkel Istwert
Meaning: Final actual ignition advance currently being commanded to the spark plugs (°BTDC).
Chapters: 12, 14, 33, 35, 40, 55, 60

Co-occurrence heatmap

How often two symbols appear in the same chapter. A 18×18 grid, drawn as inline SVG.

0 1 2–3 4–7 8+