ECU - Electronic Control Unit

In terminology of VW-group it's any electronic device, which has been carried out some logic function. Sometimes it looks like nonsens - even simple relay can be called ECU.

The coding of Electronic Control Unit used for explain the ECU where it is and what "neighbours" does it have. Very often on modern cars the coding is crossed with adaptation.

Adaptation of the Electronic Control Unit serves to explain to the ECU with whom and how to talk (If we have started to speak allegories) and serves as storehouse of various adjustable parameters. ( part of memory in the Control Unit which can be changed via internal software )

Measured Values Blocks ( MWB ) various parameters being inbound or calculated. Considering to value of MWB Electronic Control Unit, trying to "control"... Using of MWB allows you ( if you know the basic parameters ) to find out "close to boundary" or temporarily arising ( intermittent, sporadic ) malfunctions and many other useful things at competent use.


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J217_8E_37_01J_1_0304_21_TPL20221_Sollwerte.htm
J217_8E_37_01J_1_0304_21_TPL21788_Sollwerte.htm
J217_8E_37_01J_2_1103_21.htm
J217_8E_37_01J_3_0102_21.htm
J217_8E_37_01V_1_0601_21_MWB_lesen.htm
J217_8E_37_____1_1000.htm
J217_8E_37_____1_1101_21.htm
J217_8E_38_01J_1_0303_21_codieren.htm
J217_8E_38_01J_1_0506_21_Pinbelegung.htm
J217_8E_38_01J_2_0303_21_codieren.htm
J217_8E_38_01V_1_0102_21.htm
J217_8E_38_01V_1_0303_21_codieren.htm
J217_8E_38_01V_2_0303_21_codieren.htm
J217_8E_38_09L_1_0503_21_MW_lesen.htm
J217_8E_38_09L_1_0503_21_Pinbelegung.htm
J217_8E_38_09L_1_0503_21_RdW_codieren.htm
J217_8E_38_09L_1_0505_21_MW_lesen.htm
J217_8E_38_09L_2_0503_21_MW_lesen.htm
J217_8E_38_09L_2_0503_21_USA_codieren.htm
J217_8E_38_0AN_1_0506_21_MWB_lesen.htm
J217_8E_38_0AN_1_0506_21_RdW_codieren.htm
J217_8E_38_0AN_1_0506_21_USA_codieren.htm
J217_8E_38_____1_0503_21_SG-Version.htm
J217_8E_38_____2_0503_21_erw-SG-Ident.htm
J217_8E_38_____3_0503_21_Softwareversion.htm
J217_8E_38_____4_0503_21_Hardwarenr.htm
J217_8E_38_____5_0503_21_Fahrgestellnr.htm
J217_8E_38_____6_0503_21_Motornr.htm
J217_8E_38_____7_0503_21_Typpruefnr.htm
J217_8E_38_____8_0503_21_Flashstatus.htm
J217_8E_38_____9_0503_21_Lebenslauf.htm

Reading measured value block

 

Audi A4 2001> - multitronic 0AN

Audi A4 Cabriolet 2003> - multitronic 0AN

From model year 2007

 

The following measured value blocks can be displayed:

 

 

Display group 001:

 

Display zone 1: Brake light switch

J Brake not pressed: Bls. OFF

J Brake pressed: Bls. ON

 

Display zone 2: Brake test switch

J Brake not pressed: Bts.OFF

J Brake pressed: Bts.ON

 

Display zone 3: Selector lever lock solenoid -N110

J Selector lever position R, D, and S: PN inactive;

J Selector lever position P and N, brake not pressed: PN active

J Selector lever position P and N, brake pressed: PN inactive

 

Display zone 4: Speed

(xxx km/h)

 

 

Display group 002:

 

Display zone 1: Selector lever position

J P

J ZP (between P and R)

J R

J ZN (between R and N or N and D)

J N

J D

J S

J In case of fault: Er

 

Display zone 2: Hall sender status of multi-function switch -F125

J P: 0 1 0 1

J ZP: 0 1 0 0 (between P and R)

J R: 0 1 1 0

J ZN: 0 0 1 0 (between R and N or N and D)

J N: 0 0 1 1

J D: 1 0 1 0

J S: 1 0 0 0

J All other number combinations designate a faulty selector lever position (0000, 0001, 0111, 1001, 1011, 1100, 1101, 1110, 1111)

 

Display zone 3: Tiptronic switch -F189, recognition

J Selector lever not in Tiptronic gate: unpressed

J Selector lever in Tiptronic gate: M-shift

 

Display zone 4: Engaged gear

J P

J R

J N

J D

J S

J In Tiptronic mode: 1; 2; 3; 4; 5; 6; 7

 

 

Display group 003:

 

Display zone 1: Selector lever position

J P

J ZP (between P and R)

J R

J ZN (between R and N or N and D)

J N

J D

J S

J In case of fault: Er

 

Display zone 2: Tiptronic switch -F189, recognition

J Selector lever not in Tiptronic gate: unpressed

J Selector lever in Tiptronic gate: M-shift

 

Display zone 3: Tiptronic switch -F189, upshift

J Selector lever not in position '+': unpressed

J Selector lever in position '+': Change-up

J Shift paddle or steering wheel Tiptronic button '+' not pressed: unpressed

J Shift paddle or steering wheel Tiptronic button '+' pressed: Change-up

 

Display zone 4: Tiptronic switch -F189, downshift

J Selector lever not in position '-': unpressed

J Selector lever in position '-': Downshift

J Shift paddle or steering wheel Tiptronic button '-' not pressed: unpressed

J Shift paddle or steering wheel Tiptronic button '-' pressed: Downshift

 

 

Display group 004:

 

Display zone 1: Selector lever position

J P

J ZP (between P and R)

J R

J ZN (between R and N or N and D)

J N

J D

J S

J In case of fault: Er

 

Display zone 2: Direction indicator

J Forward: Forwards

J Reverse: Reverse

J No direction detected (e.g. when standing): n. detected

(The direction of travel is determined by the two gearbox output speed senders -G195/-G196. If one of the two senders is faulty, no direction is detected)

 

Display zone 3: Gearbox output speed 1 -G195

(0 to 2200 rpm)

 

Display zone 4: Gearbox output speed 2 -G196

(0 to 2200 rpm)

 

 

Display group 005:

 

Display zone 1: Selector lever position

J P

J ZP (between P and R)

J R

J ZN (between R and N or N and D)

J N

J D

J S

J In case of fault: Er

 

Display zone 2: Signal for starter inhibitor

J Selector lever position P, N: Term.50 ON

J Selector lever position R, D, S: Term.50 OFF

 

Display zone 3: Signal for reversing light

J Selector lever position R: Relay ON

J Selector lever position P, N, D, S: Relay OFF

 

Display zone 4: Term. 15 supply voltage

(min. 9 V; max. 15 V)

 

 

Display group 006:

 

Display zone 1: Selector lever position

J P

J ZP (between P and R)

J R

J ZN (between R and N or N and D)

J N

J D

J S

J In case of fault: Er

 

Display zone 2: Current in pressure regulating valve 2 -N216

(xxx A)

 

Display zone 3: Current in pressure regulating valve 1 -N215

(xxx A)

 

Display zone 4: Current in solenoid valve 1 -N88

(xxx A)

 

 

Display group 007:

 

Display zone 1: Engine speed

(0 to 7000 rpm)

 

Display zone 2: Gearbox input speed (from gearbox input speed sender -G182)

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

Display zone 3: Gearbox output speed (the speed delivered by gearbox output speed sender 1 is displayed. If it is defective, that of gearbox output speed sender 2 -G196 is displayed in its place)

(0 to 2200 rpm)

 

Display zone 4: Synchronous flag

J SY: Synchronous mode, signifying that the forward or reverse clutch at the gearbox input is closed and is no longer slipping

J AS: Asynchronous mode, signifying that the forward or reverse clutch at the gearbox input is open or the gearbox is in the starting-off phase

 

 

Display group 008:

 

Display zone 1: Accelerator pedal value

(The accelerator pedal value is transmitted by the accelerator pedal position sender over the drive train data bus to the gearbox control unit.)

(0 to 100 %)

 

Display zone 2: Actual gearbox output speed

(0 to 2200 rpm)

 

Display zone 3: Specified gearbox input speed

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

Display zone 4: Actual gearbox input speed

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

 

Display group 009:

 

Display zone 1: Accelerator pedal value

(The accelerator pedal value is transmitted by the accelerator pedal position sender over the drive train data bus to the gearbox control unit.)

(0 to 100 %)

 

Display zone 2: Kickdown switch

(The kickdown signal is transmitted by the accelerator pedal position sender over the drive train data bus to the gearbox control unit.)

J Kickdown unpressed: unpressed

J Kickdown pressed: Kick Down

 

Display zone 3: Engine torque

(The engine torque is transmitted from the engine control unit over the drive train data bus to the gearbox control unit)

(xxx Nm)

 

Display zone 4: Engine speed

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

 

Display group 010:

 

Display zone 1: Adaption of clutch characteristic, forward

(xxx A)

 

Display zone 2: Adaption of starting, forward

J Adaption running: ADP. runs

J Adaption successful: ADP OK

 

Display zone 3: Gearbox oil temperature (from gearbox oil temperature sender -G93)

(readout from gearbox oil temperature sender -G93)

(-40 to 150 C)

 

Display zone 4: Specified clutch torque

(0 to xxx Nm)

 

 

Display group 011:

 

Display zone 1: Adaption of clutch characteristic, reverse

(0.2 A to 0.35 A)

 

Display zone 2: Adaption of starting, reverse

J Adaption running: ADP. runs

J Adaption successful: ADP OK

 

Display zone 3: Gearbox oil temperature (from gearbox oil temperature sender -G93)

(readout from gearbox oil temperature sender -G93)

(-40 to 150 C)

 

Display zone 4: Specified clutch torque

(0 to xxx Nm)

 

 

Display group 012:

 

Display zone 1: Adaption of clutch characteristic, forward

(xxx A)

 

Display zone 2: Adaption of clutch characteristic forward, maximum torque

(0.7 A to 0.95 A)

 

Display zone 3: Adaption of clutch characteristic, forward

(xxx A)

 

Display zone 4: Vacant

 

 

Display group 013:

 

Display zone 1: Offset adaption value, clutch pressure

(xxx bar)

 

Display zone 2: Offset adaption value, torque sensor pressure

(xxx bar)

 

Display zone 3: Gearbox oil temperature (from gearbox oil temperature sender -G93)

(readout from gearbox oil temperature sender -G93)

(-40 to 150 C)

 

Display zone 4: Coolant temperature

(engine coolant temperature)

(xxx C)

 

 

Display group 014:

 

Display zone 1: Adaption of clutch characteristic, forward

(xxx A)

 

Display zone 2: Adaption of clutch characteristic forward, maximum torque

(min. 0.7 A, max. 0.95 A)

 

Display zone 3: Adaption of clutch characteristic reverse, minimum torque

(min. 0.2 A, max. 0.35 A)

 

Display zone 4: Adaption of clutch characteristic reverse, maximum torque

(min. 0.7 A, max. 0.95 A)

 

 

Display group 015:

 

Display zone 1: Clutch pressure adaption, current value for 0 bar

(min. 0.05 A, max. 0.120 A)

 

Display zone 2: Clutch pressure adaption, current value for 10 bar

(min. 0.800 A, max. 0.900 A)

 

Display zone 3: Clutch pressure

(xxx bar)

 

Display zone 4: Specified clutch pressure

(xxx bar)

 

 

Display group 016:

 

Display zone 1: Underdrive transmission ratio

 

Display zone 2: Overdrive transmission ratio

 

Display zone 3: Disk set control, track reinforcement

 

Display zone 4: Current transmission ratio

 

 

Display group 017:

 

Display zone 1: Accelerator pedal value

(The accelerator pedal value is transmitted by the accelerator pedal position sender over the drive train data bus to the gearbox control unit.)

(0 to 100 %)

 

Display zone 2: Engine speed

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

Display zone 3: Engine torque

(xxx Nm)

 

Display zone 4: Specified clutch torque

(xxx Nm)

 

 

Display group 018:

 

Display zone 1: Torque sensor pressure

(0 to 25 bar)

 

Display zone 2: Specified clutch torque

(-40 Nm to 640 Nm)

 

Display zone 3: Actual clutch pressure

(xxx bar)

 

Display zone 3: Current in pressure regulating valve 1 -N215

(xxx A)

 

 

Display group 019:

 

Display zone 1: Torque sensor pressure

(xxx bar)

 

Display zone 2: Current in pressure regulating valve 1 -N215

(xxx A)

 

Display zone 3: Status of air conditioner

J Compressor on: Compr. ON

J Compressor off: Compr. OFF

 

Display zone 4: Vacant

 

 

Display group 020:

 

Display zone 1: Engine speed

(0 to 7000 rpm (petrol engine))

(0 to 5500 rpm (diesel engine))

 

Display zone 2: Engine specified idling speed

(xxx rpm)

 

Display zone 3: Gearbox specified idling speed

(xxx rpm)

 

Display zone 4: Vacant

 

 

Display group 021:

 

Display zone 1: Driver input torque

(xxx Nm)

 

Display zone 2: Actual engine torque

(xxx Nm)

 

Display zone 3: Specified engine torque

(xxx Nm)

 

Display zone 4: Torque gradient

(0 to 2550 Nm/s)

 

 

Display group 022:

 

Display zone 1: ABS active/not active

J ABS active

J ABS n. active

 

Display zone 2: EDL active/not active

J EDL active

J EDL n, active

 

Display zone 3: TCS active/not active

J TCS active

J TCS n. active

 

Display zone 4: ESP active/not active

J ESP active

J ESP n. active

 

 

Display group 023:

 

Display zone 1: Overrun torque limitation active/not active

J activated

J inactive

 

Display zone 2: Disk set overpressing active/not active

J activated

J inactive

 

Display zone 3: Clutch overpressing active/not active

J activated

J inactive

 

Display zone 4: Vacant

 

 

Display group 024:

 

Display zone 1: Request to MIL lamp

(MIL lamp: exhaust gas warning lamp)

J MIL lamp on: MIL on

J MIL lamp off: MIL off

 

Display zone 2: Transfer function

(Torque on wheels measured to torque on clutch)

(0 to 25.4)

 

Display zone 3: Motion resistance index

(-31.6 to 31.6)

 

Display zone 4: CAN software status

(The CAN software version is transmitted from the engine control unit over the drive train data bus to the gearbox control unit. If fault 18263 - Drive train data bus, software version monitoring - is entered in the gearbox control unit, the engine control unit must be checked.)

 

 

Display group 026:

 

Display zone 1: Operating status

To software release 41xx:

J Run-on active: No readout

J Run-on not active: A special character is displayed

 

From software release 42xx:

J Run-on active: run-on

J Run-on not active: No readout

 

Display zone 2: Supply voltage (terminal 87)

(min: 9 V; max: 15 V)

 

Display zone 3: Torque sensor pressure

(xx bar)

 

Display zone 4: Clutch pressure

(xx bar)

 

 

Display group 028:

 

Display zone 1: Hill Hold function permitted/not permitted

(Hill Hold function: When the vehicle stops on a hill, above a certain gradient the gearbox can no longer hold the vehicle by closing the clutch. The vehicle would roll back as a result. Consequently the EPB is additionally activated/closed.

EPB: Electronic parking brake)

J -: No Hill Hold function

J 0: There is a fault in the gearbox control unit which is not permitting the Hill Hold function

J 1: Hill Hold function permitted

 

Display zone 2: Gearbox request to EPB Hill Hold function

(Hill Hold function: When the vehicle stops on a hill, above a certain gradient the gearbox can no longer hold the vehicle by closing the clutch. The vehicle would roll back as a result. Consequently the EPB is additionally activated/closed.

EPB: Electronic parking brake)

J -: No Hill Hold function

J 0: Open EPB

J 1: Close EPB

 

Display zone 3: Status of EPB

(EPB: Electronic parking brake)

J -: No Hill Hold function

J 0: open

J 1: closed

 

Display zone 4: Calculated gradient in gearbox

(Various readouts from different control units are applied to calculate a gradient in the gearbox control unit when the vehicle is on a hill.)

J -: No Hill Hold function

 

 

Display group 065:

 

Display zone 1: Safety valve tripping, general

If a fault is detected in the oil circuit, in some situations the safety valve is tripped by the control unit.

J 0: No tripping of safety valve detected so far

J Above 0: One or more trips of the safety valve was detected. To create a more accurate diagnosis measured value block 65 display zone 2 must be viewed

 

Display zone 2: Safety valve tripping

If a fault is detected in the oil circuit, in some situations the safety valve is tripped by the control unit.

With each trip of the safety valve the readout is increased by the value 10. If no more faults are detected in a new driving cycle, the readout is reduced by 1.

At a readout of 70 fault 18181 - Hydraulic pressure sender 1 -G193, signal too large - is entered

J 0: No tripping of safety valve detected so far

J Above 0: One or more trips of the safety valve was detected.

(example: If a value of 30 is measured during a driving cycle, and the ignition then switched off and back on again, a new driving cycle executed, then the measurement read again and a readout of 29 found, the oil circuit is OK again. However, if the readout is 40 the problem in the oil circuit persists.)

 

 

Display zone 3: Status safety valve

J 0: The safety valve has not tripped

J Above 0: The safety valve has tripped, the gearbox oil circuit is not OK

 

Display zone 4: Vacant

 

 

Display group 125:

 

Display zone 1: CAN connection engine electronics

J Engine 0: No CAN connection

J Engine 1: CAN connection OK.

 

Display zone 2: CAN connection brake electronics

J ABS 0: No CAN connection

J ABS 1: CAN connection OK.

 

Display zone 3: CAN connection steering wheel electronics

J Steering wheel 0: No CAN connection

J Steering wheel 1: CAN connection OK.

 

Display zone 4: CAN connection dash panel insert

J Combi 0: No CAN connection

J Combi 1: CAN connection OK.

 

 

Display group 126:

 

Display zone 1: CAN link ACC

J Distance 0: I No CAN connection

I No ACC fitted, communication with the engine control unit not OK

 

J Distance 1: I CAN connection OK

I No ACC fitted, message is alternatively sent by engine control unit

 

Display zone 2: CAN connection data bus diagnostic interface

J Gateway 0: No CAN connection

J Gateway 1: CAN connection OK.

 

Display zone 3: Vacant

 

Display zone 4: Vacant

 

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