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.


J217_8N_37_02E_1_1202_21_Ersetzen.htm
J217_8N_37_02E_1_1202_21_MWB_lesen.htm
J217_8N_37_02E_1_1202_21_Version_abfragen.htm
J217_8N_37_02E_3_0403_21_codieren.htm
J217_8N_37_02E_4_0403_21_codieren.htm
J217_8N_37_09G_1_0302_21_MWB_lesen.htm
J217_8N_37_09G_1_0702_21_Einbauort.htm
J217_8N_37_09G_1_0802_21_Pinbelegung.htm
J217_8N_37_09G_2_0302_21_SG_Version.htm
J217_8N_37_09G_3_0303_21_codieren.htm
J217_8N_37_09G_4_0303_21_codieren.htm

Measured value blocks for control unit -J743 (DQ250 - 6Q):

 

Measured value block 1:

1. Brake light switch (Brake for pressed/no readout for not pressed)

2. Brake test switch (Brake for pressed/no readout for not pressed)

3. Shift lock status (PN active/inactive)

4. Speed (0... 255 km/h).

 

PN - Selector lever at P (Park) or N (Neutral - no gear engaged)

 

Measured value block 2:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Plausibility checked selector lever position (P, R, N, D, S, TT, ER)

3. Error byte from selector lever (0 - inactive

1 - active)

4. Engaged gear (Gear: P, R, N, D

Tiptronic: 1 , 2, 3 , 4, 5, 6)

 

Inactive - means in measured value block 2 - fault-free

P - Park

R - Reverse

N - Neutral

D - Drive (normal)

S - Drive (sport)

TT - Tiptronic mode

PL - Plus (Upshift in Tiptronic mode)

MI - Minus (Downshift in Tiptronic mode)

IN - Intermediate (selector lever between two gears)

ER - ERROR

 

 

Measured value block 3:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Plausibility checked selector lever position (P, R, N, D, S, TT, ER)

3. Tiptronic Up on steering wheel (pressed/unpressed)

4. Tiptronic Down on steering wheel (pressed/unpressed)

 

Measured value block 4:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Direction of travel (forward, reverse, not recognised)

3. Output speed 1 (0... 4080 rpm)

4. Output speed 2 (0... 4080 rpm)

 

Measured value block 5:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Start enable (pressed/unpressed)

3. Supply voltage 1 (0... 25.5 V)

4. Supply voltage 2 (0... 25.5 V)

 

Measured value block 6:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Valve current clutch valve 1 (0... 1,530 A)

3. Duty cycle safety valve 1 (0... 100%)

4. Main pressure valve current (0... 1,530 A)

 

Measured value block 7:

1. Selector lever position (P, R, N, D, S, TT, PL, MI, ZS, ER)

2. Valve current clutch valve 2 (0... 1,530 A)

3. Duty cycle safety valve 2 (0... 100%)

4. Main pressure valve current (0... 1,530 A)

 

Measured value block 8:

1. Input speed (0... 8160 rpm)

2. Input shaft speed 1 (0... 8160 rpm)

3. Input shaft speed 2 (0... 8160 rpm)

4. Output speed (0... 4080 rpm)

 

Measured value block 9:

1. Engine speed (0... 8160 rpm)

2. Input speed (0... 8160 rpm)

3. Output speed (0... 4080 rpm)

4. Output speed from CAN (0... 4080 rpm)

 

Measured value block 10:

1. Accelerator pedal angle (0... 100%)

2. Kickdown switch (pressed/not pressed - when unpressed no readout)

3. Engine torque (-100... 410 Nm)

4. Engine torque loss (-50... 205 Nm)

 

Measured value block 11:

1. Input shaft speed 1 (0... 8160 Nm)

2. Specified clutch torque K1 (-600... 600 Nm)

3. Valve current clutch valve 1 (0... 1,530 A)

4. Actual pressure clutch 1 (-327,68... 327.67 bar)

 

Measured value block 12:

1. Input shaft speed 2 (0... 8160 Nm)

2. Specified clutch torque K2 (-600... 600 Nm)

3. Valve current clutch valve 2 (0... 1,530 A)

4. Actual pressure clutch 2 (-327.68... 327.67 bar)

 

Measured value block 13:

1. Specified current clutch valve 1 (0... 1,530 A)

2. Duty cycle safety valve 1 (0... 100%)

3. Duty cycle gear actuator valve 1 (0... 100%)

4. Duty cycle gear actuator valve 2 (0... 100%)

 

Measured value block 14:

1. Specified current clutch valve 2 (0... 1,530 A)

2. Duty cycle safety valve 2 (0... 100%)

3. Duty cycle gear actuator valve 3 (0... 100%)

4. Duty cycle gear actuator valve 4 (0... 100%)

 

Measured value block 15:

1. Travel measurement gear actuator 1-3 (0... 1023)

2. Travel measurement gear actuator 2-4 (0... 1023)

3. Travel measurement gear actuator 5-N (0... 1023)

4. Travel measurement gear actuator 6-R (0... 1023)

 

Measured value block 16:

1. Travel gear actuator 1-3 (-12,7... 12.8mm)

2. Travel gear actuator 2-4 (-12,7... 12.8mm)

3. Travel gear actuator 5-N (-12,7... 12.8mm)

4. Travel gear actuator 6-R (-12,7... 12.8mm)

 

Measured value block 17:

1. Synchronous travel 3rd gear: (-12,7... 12.8mm)

2. Synchronous travel 2nd gear: (-12,7... 12.8mm)

3. Vacant

4. Synchronous travel R gear: (-12,7... 12.8mm)

 

Measured value block 18:

1. Synchronous travel 1st gear: (-12,7... 12.8mm)

2. Synchronous travel 4th gear: (-12,7... 12.8mm)

3. Synchronous travel 5th gear: (-12,7... 12.8mm)

4. Synchronous travel 6th gear: (-12,7... 12.8mm)

 

 

Measured value block 19:

1. Temperature standard (-250... 250 C)

2. Temperature reserve (-250... 250 C)

3. Temperature clutch (-250... 250 C)

4. Empty gas info (no empty gas/empty gas - means idle)

 

Measured value block 30:

1. Lower adapted clutch pressure K1 (0... 1,275 A)

2. Lower adapted clutch pressure K1 from microslip adaption (0... 1,275 A)

3. Upper adapted clutch pressure K1 from microslip adaption (0... 1,275 A)

4. Upper adapted clutch pressure K1 from macroslip adaption (0... 1,275 A)

 

Measured value block 31:

1. Lower adapted clutch pressure K2 (0... 1,275 A)

2. Lower adapted clutch pressure K2 from microslip adaption (0... 1,275 A)

3. Upper adapted clutch pressure K2 from microslip adaption (0... 1,275 A)

4. Upper adapted clutch pressure K2 from macroslip adaption (0... 1,275 A)

 

Measured value block 32:

1. Current lower pressure point clutch 1 from current-to-pressure adaption (0... 1,275 A)

2. Current upper pressure point clutch 1 from current-to-pressure adaption (0... 1,275 A)

3. Current lower pressure point clutch 2 from current-to-pressure adaption (0... 1,275 A)

4. Current upper pressure point clutch 2 from current-to-pressure adaption (0... 1,275 A)

 

Measured value block 33:

1. Main pressure adaption readings: Success counter to K1 (0... 65535)

2. Main pressure adaption readings: Abort counter to K1 (0... 65535)

3. Main pressure adaption readings: Success counter to K2 (0... 65535)

4. Main pressure adaption readings: Abort counter to K2 (0... 65535)

 

Measured value block 40:

1. Flash checksum (0... 255)

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 41:

1. Parameter set designation

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 42:

1. Mantissa of software parameter 1 (0... 255)

2. Mantissa of software parameter 2 (0... 255)

3. Mantissa of software parameter 3 (0... 255)

4. Mantissa of software parameter 4 (0... 255)

 

Measured value block 43:

1. Mantissa of software parameter 5 (0... 255)

2. Mantissa of software parameter 6 (0... 255)

3. Mantissa of software parameter 7 (0... 255)

4. Mantissa of software parameter 8 (0... 255)

 

Measured value block 44:

1. Mantissa of software parameter 9 (0... 255)

2. Mantissa of software parameter 10 (0... 255)

3. Vacant

4. Vacant

 

Measured value block 45:

1. Exponent of software parameter 1 (0... 255)

2. Exponent of software parameter 2 (0... 255)

3. Exponent of software parameter 3 (0... 255)

4. Exponent of software parameter 4 (0... 255)

 

Measured value block 46:

1. Exponent of software parameter 5 (0... 255)

2. Exponent of software parameter 6 (0... 255)

3. Exponent of software parameter 7 (0... 255)

4. Exponent of software parameter 8 (0... 255)

 

Measured value block 47:

1. Exponent of software parameter 9 (0... 255)

2. Exponent of software parameter 10 (0... 255)

3. Vacant

4. Vacant

 

Measured value block 48:

1. Software designation DQ250

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 49:

1. Minimum voltage at UH1

2. Maximum voltage at UH1

3. Minimum voltage at UH2

4. Maximum voltage at UH2

 

UH1 - Internal control unit auxiliary voltage

UH2 - Internal control unit auxiliary voltage

 

Measured value block 50:

1. Selector lever part number

Characters 1 to 12 (part number)

16 (programmability 0 or 1)

18 to 19 (program version)

21 to 22 (data level)

All other characters are blanks

 

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 51:

1. Display of internal error ID no. 0 (0... 65535)

2. Display of internal error ID no. 1 (0... 65535)

3. Display of internal error ID no. 2 (0... 65535)

4. Display of internal error ID no. 3 (0... 65535)

 

Measured value block 52:

1. Display of internal error ID no. 4 (0... 65535)

2. Display of internal error ID no. 5 (0... 65535)

3. Display of internal error ID no. 6 (0... 65535)

4. Display of internal error ID no. 7 (0... 65535)

 

Measured value block 53:

1. Display of internal error ID no. 8 (0... 65535)

2. Display of internal error ID no. 9 (0... 65535)

3. Display of internal error ID no. 10 (0... 65535)

4. Display of internal error ID no. 11 (0... 65535)

 

Measured value block 60:

1. Status gear actuator adaption (Synchronous: 0-1-2-3-4-5-6-7-8-9-10-11-12-13

engaged: 129-130-131-132-133-134-135-136-137-138-139-140-141)

2. Sub-status gear actuator adaption (Synchronous: 0-1-2-3

engaged: 128-129-130-131-132-133-134-135-136-137)

3. Gear actuator index (0 = GS_13

1 = GA_24

2 = GA_5N

3 = GA_6R)

4. Gear actuator side (0 = neutral

1 = side A (negative travels: 3-2-N-R)

2 = side B (positive travels: 1-4-5-6))

 

Measured value block 61:

1. Status gear actuator adaption (Synchronous: 0-1-2-3-4-5-6-7-8-9-10-11-12-13

engaged: 129-130-131-132-133-134-135-136-137-138-139-140-141)

2. Sub-status gear actuator adaption (Synchronous: 0-1-2-3

engaged: 128-129-130-131-132-133-134-135-136-137)

3. Gear actuator index (0 = GS_13

1 = GA_24

2 = GA_5N

3 = GA_6R)

4. Gear actuator side (0 = neutral

1 = side A (negative travels: 3-2-N-R)

2 = side B (positive travels: 1-4-5-6))

 

Measured value block 62:

1. Status at standstill for shaft 1: (0 = OFF

1 = EMPTY

2 = ENGAGE

3 = REFERENCE

4 = START VALUE

5 = RAMP

6 = CONTROL

7 = DONE

8 = CALCULATION

 

16 = MVB_INACTIVE

17 = MVB_WAIT

18 = MVB_RESULT

19 = MVB_ABORT_TESTER

 

32 = MVB_EMERGENCYRUNNING

33 = MVB_N_ENGINE

34 = MVB_ENGINE_NOK

35 = MVB_TEMPERATURE

36 = MVB_BRAKE

37 = MVB_ACCELERATORPEDAL

38 = MVB_V_VEH

39 = MVB_SELECTORLEVER

40 = MVB_M_ENGINE_LOSS

41 = MVB_M_ENGINE_MAX

 

64 = MVB_SYSTEM

65 = MVB_CLUTCH_NOK

66 = MVB_SIG_UNSTABLE

67 = MVB_DMMOT_CONTROL)

2. Status at standstill for shaft 2: (0 = OFF

1 = EMPTY

2 = ENGAGE

3 = REFERENCE

4 = START VALUE

5 = RAMP

6 = CONTROL

7 = DONE

8 = CALCULATION

 

16 = MVB_INACTIVE

17 = MVB_WAIT

18 = MVB_RESULT

19 = MVB_ABORT_TESTER

 

32 = MVB_EMERGENCYRUNNING

33 = MVB_N_ENGINE

34 = MVB_ENGINE_NOK

35 = MVB_TEMPERATURE

36 = MVB_BRAKE

37 = MVB_ACCELERATORPEDAL

38 = MVB_V_VEH

39 = MVB_SELECTORLEVER

40 = MVB_M_ENGINE_LOSS

41 = MVB_M_ENGINE_MAX

 

64 = MVB_SYSTEM

65 = MVB_CLUTCH_NOK

66 = MVB_SIG_UNSTABLE

67 = MVB_DMMOT_CONTROL)

3. Lower adapted clutch point for K1 (0... 1,275 A)

4. Lower adapted clutch point for K2 (0... 1,275 A)

 

Measured value block 63:

1. Fitting info steering wheel paddles (0 = not recognised

1 = recognised)

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 64:

1. Number of exceedings of permissible centrifugal oil temperature (0... 255)

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 65:

1. Correction values main pressure adaption: Low pressure on K1 (-327.68... 327.67 bar)

2. Correction values main pressure adaption: High pressure on K1 (-327.68... 327.67 bar)

3. Correction values main pressure adaption: Low pressure on K2 (-327.68... 327.67 bar)

4. Correction values main pressure adaption: High pressure on K2 (-327.68... 327.67 bar)

 

Measured value block 66:

1. Adapted flags gear actuator 13 (0 = inactive / 1 = active)

2. Adapted flags gear actuator 24 (0 = inactive / 1 = active)

3. Adapted flags gear actuator 5N (0 = inactive / 1 = active)

4. Adapted flags gear actuator 6R (0 = inactive / 1 = active)

 

Measured value block 67:

1. Clutch adaption values: for K1 (0... 1,275 A)

2. Clutch adaption values: for K2 (0... 1,275 A)

3. Vacant

4. Vacant

 

Measured value block 68:

1. Clutch adaption values: Lower current point adaption K1 (0... 1,275 A)

2. Clutch adaption values: Lower current point adaption K2 (0... 1,275 A)

3. Vacant

4. Vacant

 

Measured value block 80:

1. Measured value block 80 as per expanded control unit identification

(manufacturer works number and identifier : hhh-kkk, 7-digit

Date of manufacture : dd.mm.yy, 8-digit

Manufacturer modification status number : 12345678, 8-digit

Manufacturer test status no. : pppp, 4-digit

Manufacturer serial no. : nnnn, 4-digit)

 

Measured value block 81:

1. Measured value block 81 as per expanded control unit identification

(Chassis number : 17-digit

Module no. or serial no. : 14-digit

Type test number : 7-digit)

 

Measured value block 82:

1. Measured value block 82 as per expanded control unit identification

(Flash tool code : 1234567890123, 13-digit

Flash date : dd.mm.yy, 8-digit

Hardware module : 3-digit

Hardware sort key : 2-digit

Software module : 3-digit

Software sort key : 2-digit)

 

Measured value block 125:

1. CAN devices, engine (Engine 0 = no message / Engine 1 = message OK)

2. CAN devices, ABS (ABS 0 = no message / ABS 1 = message OK)

3. CAN devices, dash panel insert (Combi 0 = no message / Combi 1 = message OK)

4. CAN devices, selector lever (Selector lever 0 = no message / Selector lever 1 = message OK)

 

Measured value block 126:

1. CAN device data bus diagnostic interface (in Audi TT 1999 not fitted - readout always gateway 0)

2. Vacant

3. Vacant

4. Vacant

 

Measured value block 225:

1. Number of timeouts, engine (0... 255, multiple of EMC timeout)

2. Number of timeouts, ABS (0... 255, multiple of EMC timeout)

3. Number of timeouts, dash panel insert (0... 255, multiple of EMC timeout)

4. Number of timeouts, selector lever (0... 255, multiple of EMC timeout)

 

Measured value block 226:

1. Number of timeouts, gateway (0... 255, multiple of EMC timeout)

2. Vacant

3. Vacant

4. Vacant

 

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