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_4F_38_01J_1_0504_21_USA_codieren.htm
J217_4F_38_01J_1_0505_21_MWB_lesen.htm
J217_4F_38_01J_1_0506_21_Pinbelegung.htm
J217_4F_38_01J_1_0903_21_RdW_codieren.htm
J217_4F_38_01J_1_1103_21_Anpassung.htm
J217_4F_38_01J_1_1103_21_Pinbelegung.htm
J217_4F_38_09E_1_0206_21_MW_lesen.htm
J217_4F_38_09E_1_0206_21_RdW_codieren.htm
J217_4F_38_09E_2_0206_21_USA_codieren.htm
J217_4F_38_09L_1_0104_21_MW_lesen.htm
J217_4F_38_09L_1_0903_21_RdW_codieren.htm
J217_4F_38_09L_1_1203_21_Pinbelegung.htm
J217_4F_38_09L_2_0506_21_Pinbelegung.htm
J217_4F_38_09L_2_0903_21_USA_codieren.htm
J217_4F_38_0AN_1_0506_21_Pinbelegung.htm
J217_4F_38_0AN_1_1105_21_MWB_lesen.htm
J217_4F_38_0AN_1_1105_21_RdW_codieren.htm
J217_4F_38_0AN_1_1105_21_USA_codieren.htm
J217_4F_38_0AN_2_0506_21_Pinbelegung.htm
J587_4F_37_01J_1_0204_21.htm
J587_4F_37_09L_1_0104_21.htm

Reading measured value block

 

Audi A6 2005> - Automatic gearbox 09L

From model year 2005

 

The following measured value blocks can be displayed:

 

 

Display group 001:

 

Display zone 1: Engine speed

Display range: 0 to 8160 rpm

 

Display zone 2: Gearbox input speed -G182

Display range: 0 to 8160 rpm

 

Display zone 3: Gearbox output speed -G195

Display range: 0 to 8160 rpm

 

Display zone 4: engaged gear

J 1

J 2

J 3

J 4

J 5

J 6

J 1m

J R

 

 

Display group 002:

 

Display zone 1: Current gearshift program

J 0 - 4: Shift programs for steep downhill slopes

J 5 - 9: Shift programs for gentle downhill slopes

J 10 - 14: Shift programs for level roads

J 15 - 19: Shift programs for minor inclines

J 20 - 24: Shift programs for major inclines

J 25 - 26: Shift programs for Winter driving

J 27: Shift program for Tiptronic function

J 28: Not used

J 29: Shift program in case of increased gearbox temperatures

J 30 - 31: Shift programs for warm-up

J 32: Shift program for urban driving

J 33: Not used

J 34: Shift program for driving with cruise control, steep downhill

J 35: Shift program for driving with cruise control, gentle downhill

J 36: Shift program for driving with cruise control, on level roads

J 37: Shift program for driving with cruise control, minor incline

J 38: Shift program for driving with cruise control, major incline

J 39: Shift program for uphill driving in case of increased gearbox temperatures

J 40: Shift program for Tiptronic function in case of increased gearbox temperatures

J 41 - 45: Shift program for ACC function

 

Display zone 2: 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.)

Display range: 0 to 100 %

 

Display zone 3: Gearbox output speed -G195

Display range: 0 to 8160 rpm

 

Display zone 4: engaged gear

J 1

J 2

J 3

J 4

J 5

J 6

J 1m

J R

 

 

Display group 003:

 

Display zone 1: Brake light switch

J Brake pressed: Brake

J Brake unpressed: No readout

 

Display zone 2: 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 3: Vehicle speed

Display range: 0 to xxx km/h

 

Display zone 4: Voltage supply to solenoid and pressure control valves

Display range: approx. battery voltage (in Volts)

 

 

Display group 004:

 

Display zone 1: Gearbox oil temperature

(readout from gearbox oil temperature sender -G93)

Display range: -40 to 150 C

 

Display zone 2: Selector lever position

J P

J Z1 (between P and R)

J R

J Z1 (between R and N);

J N

J Z2 (between N and D)

J D

J Z3 (between D and S)

J S

J ---: Fault in multi-function switch -F125

 

Display zone 3: Hall sender status multi-function switch -F125

J P = 0010,

J Z1(between P and R) = 0011,

J R = 0001,

J Z1(between R and N) = 0101,

J N = 0100,

J Z2 (between N and D) = 1100,

J D = 1110,

J Z3 (between D and S) = 1111,

J S = 1101

J All other number combinations designate a faulty selector lever position (0000, 0110, 0111, 1000, 1001, 1010, 1011, 1100)

 

Display zone 4: OBD info

J xxx1 = Engine start detected;

J xx1x = Warm-up;

J x1xx = Driving cycle;

J 1xxx = MIL lamp (exhaust gas warning lamp) activated

 

 

 

Display group 005:

 

Display zone 1: Solenoid valve 1 -N88

J Reverse/first/second/third gear: Off 

J Fourth/fifth/sixth gear: on

 

Display zone 2: Activation pressure regulating valve 1 -N215

(for clutch A)

Display range: 0 to ... mA

 

Display zone 3: Activation pressure regulating valve 2 -N216

(for clutch B)

Display range: 0 to ... mA

 

Display zone 4: engaged gear

J 1

J 2

J 3

J 4

J 5

J 6

J 1m

J R

 

 

Display group 006:

 

Display zone 1: Activation pressure regulating valve 3 -N217

(for brake C)

Display range: 0 to ... mA

 

Display zone 2: Activation pressure regulating valve 4 -N218

(for brake D/clutch E)

Display range: 0 to ... mA

 

Display zone 3: Activation pressure regulating valve 5 -N233

(for ATF system pressure)

ATF: Gear oil

Display range: 0 to ... mA

 

Display zone 4: Activation pressure control valve 6 -N371

(for converter clutch)

Display range: 0 to ... mA

 

 

Display group 007:

 

Display zone 1: Gearbox oil temperature

(readout from gearbox oil temperature sender -G93)

Display range: -40 to 150 C

 

Display zone 2: Activation pressure control valve 6 -N371

(for converter clutch)

Display range: 0 to ... mA

 

Display zone 3: Torque converter clutch status

J Converter clutch open: TCC open

J Converter clutch regulating/slipping: TCC control

J Converter clutch closed: TCC closed

 

Display zone 4: Lock-up clutch slip

Display range: 0 to ... 1 rpm

 

 

Display group 008:

 

Display zone 1: 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: No readout

J Kickdown pressed: Kick Down

 

Display zone 2: 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.)

Display range: 0 to 100 %

 

Display zone 3: Overrun/acceleration

J Overrun: Overrun, driving downhill or decelerating (engine braking)

J No readout: Pulling (accelerating)

 

Display zone 4: Substrate temperature

(substrate temperature, temperature of electronics in control unit)

Display range: -40 to 150 C

 

 

Display group 009:

 

Display zone 1: Engine torque

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

 

Display zone 2: Engine speed

Display range: 0 to 8160 rpm

 

Display zone 3: 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.)

Display range: 0 to 100 %

 

Display zone 4: Dynamic shift program

J 1 = Gear selection as per drive program

J 8 = Shift position P

J 10 = Shift program low friction coefficient detection

J 12 = Spontaneous vehicle deceleration SVF

J 13 = TCS mode

J 15 = Tiptronic mode

J 16 = CCS (ACC) mode

J 17 = Hot mode

J 18 = Warm-up program

J 20 = Spontaneous downshift

J 26 = Engage gear

 

 

Display group 010:

 

Display zone 1: Converter gain

Display range: 0.00 to 2.55

 

Display zone 2: Engine speed

Display range: 0 to 8160 rpm

 

Display zone 3: engaged gear

J 1

J 2

J 3

J 4

J 5

J 6

J 1m

J R

 

Display zone 4: Acceleration

Display range: 0 to ... m/s2

 

 

Display group 011:

 

Display zone 1: Selector lever position

J P

J Z1 (between P and R)

J R

J Z1 (between R and N);

J N

J Z2 (between N and D)

J D

J Z3 (between D and S)

J S

J ---: Fault in multi-function switch -F125

 

Display zone 2: Tiptronic switch -F189, recognition

J Tiptronic switch -F189, recognition pressed: M-shift

J Tiptronic switch -F189, recognition unpressed: No readout

 

Display zone 3: Tiptronic switch -F189, up/down shift button

J Tiptronic switch -F189, upshift pressed: Change-up

J Tiptronic switch -F189, downshift pressed: Downshift

J Tiptronic switch -F189, up/down shift button unpressed: No readout

 

Display zone 4: Tiptronic switch -F189 and Tiptronic buttons or shift paddles on steering wheel

J xxxx1: Signal of Tiptronic Down button in selector lever

J xxx1x: Signal from Tiptronic recognition switch in selector lever

J xx1xx: Signal of Tiptronic Up button in selector lever

J x1xxx: Signal of Tiptronic Up button on steering wheel

J 1xxxx: Signal of Tiptronic Down button on steering wheel

 

YZNote

The following additional information on display zone 4 applies only to model years 2005 and 2006.

 

- in selector lever position P: 00111

- in selector lever position P and Tiptronic button on steering wheel + or shift paddle + pressed: 01111

- in selector lever position P and Tiptronic button on steering wheel - or shift paddle - pressed: 10111

- in selector lever position R: 00011

- in selector lever position R and Tiptronic button on steering wheel + or shift paddle + pressed: 01011

- in selector lever position R and Tiptronic button on steering wheel - or shift paddle - pressed: 10011

- in selector lever position N: 00110

- in selector lever position N and Tiptronic button on steering wheel + or shift paddle + pressed: 01110

- in selector lever position N and Tiptronic button on steering wheel - or shift paddle - pressed: 10110

 

- in selector lever position D/S: Alternating readout between 00000 and 00111 (i.e. the 25 Hz frequency signal of the Tiptronic sensors in the control unit is detected);

 

- in selector lever position D/S and Tiptronic button on steering wheel + or shift paddle + pressed: Alternating readout between 01000 and 01111 (i.e. the 25 Hz frequency signal of the Tiptronic sensors in the control unit is detected);

 

- in selector lever position D/S and Tiptronic button on steering wheel - or shift paddle - pressed: alternating readout between 10000 and 10111 (i.e. the 25 Hz frequency signal of the Tiptronic sensors in the control unit is detected)

 

- selector lever in Tiptronic gate: alternating readout between 00000 and 00101 (i.e. Up and Down buttons not pressed and still delivering the 25 Hz signal to the control unit (xx1x1/xx0x0), Tiptronic recognition switch connected to earth (xxx0x))

 

- selector lever in Tiptronic gate and Tiptronic button on steering wheel + or shift paddle + pressed: alternating readout between 01000 and 01101 (i.e. Up button on steering wheel pressed (x1xxx), Up and Down buttons in selector lever not pressed and still delivering the 25 Hz signal to the control unit (xx1x1/xx0x0), Tiptronic recognition switch connected to earth (xxx0x))

 

- selector lever in Tiptronic gate and Tiptronic button on steering wheel - or shift paddle - pressed: alternating readout between 10000 and 10101 (i.e. Down button on steering wheel pressed (1xxxx), Up and Down buttons in selector lever not pressed and still delivering the 25 Hz signal to the control unit (xx1x1/xx0x0), Tiptronic recognition switch connected to earth (xxx0x))

 

- Selector lever in position '+' pressed: alternating readout between 00001 and 00000 (i.e. Up button on selector lever pressed and connected to earth (xx0xx), Tiptronic recognition switch connected to earth (xxx0x), Down button not pressed and still delivering the 25 Hz signal to the control unit (xxxx1/xxxx0))

 

- Selector lever in position '-' pressed: alternating readout between 01000 and 00000 (i.e. Down button on selector lever pressed and connected to earth (xxxx0), Tiptronic recognition switch connected to earth (xxx0x), Up button not pressed and still delivering the 25 Hz signal to the control unit (xx1xx/xx0xx))

 

 

Display group 012:

 

Display zone 1: Standard engine torque

(the standardised torque is in normal circumstances above the rated torque of the engine)

 

Display zone 2: Received engine variant

(depending on engine coding, when the engine control unit is replaced the same readout must reappear at this point; if not check engine coding)

 

Display zone 3: Received engine gearbox variant

(in the engine the 09L gearbox must be coded, check engine coding)

 

Display zone 4: Received 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 - or fault 06229 - Drive train data bus, software version monitoring - is entered in the gearbox control unit, the engine control unit must be checked.)

 

 

Display group 013:

 

Display zone 1: Selector lever position

J P

J Z1 (between P and R)

J R

J Z1 (between R and N);

J N

J Z2 (between N and D)

J D

J Z3 (between D and S)

J S

J ---: Fault in multi-function switch -F125

 

Display zone 2: Starter inhibit signal (P/N signal)

J Selector lever at R, D or S and ignition key at engine start position: PN inactive (off)

(i.e. no release to start engine to engine control unit)

J Selector lever in position P or N: PN active (on)

(i.e. release to start engine to engine control unit)

 

Display zone 3: Hall sender status multi-function switch -F125

J P = 0010,

J Z1(between P and R) = 0011,

J R = 0001,

J Z1(between R and N) = 0101,

J N = 0100,

J Z2 (between N and D) = 1100,

J D = 1110,

J Z3 (between D and S) = 1111,

J S = 1101

J All other number combinations designate a faulty selector lever position (0000, 0110, 0111, 1000, 1001, 1010, 1011, 1100)

 

Display zone 4: Supply voltage terminal 30

approx. battery voltage

(less than 9V: No more shifts are executed by the control unit;

less than 7V: the solenoid and pressure control valves are electrically disabled, i.e. gearbox in emergency running mode;

less than 6.5V: the control unit is de-energised, i.e. gearbox in emergency running mode)

 

 

Display group 014:

 

Display zone 1: Gearbox oil temperature

(readout from gearbox oil temperature sender -G93)

Display range: -40 to 150 C

 

Display zone 2: Substrate temperature

(substrate temperature, temperature of electronics in control unit)

Display range: -40 to 150 C

 

Display zone 3: Temperature protection measure

(if the gearbox oil temperature is too high the control unit initiates protective measures to prevent a defect in the gearbox)

J 0 = not active (no protective measures)

J 1 = active (no protective measures have been initiated)

 

Display zone 4: Maximum permissible engine torque

(the displayed torque value is sent by the gearbox control unit to the engine control unit.

If the value is less than the nominal torque of the engine, that signifies a limitation of the engine torque by the gearbox (e.g. by excessively long periods of gearbox high temperatures))

 

 

Display group 015:

 

Display zone 1: Vacant

 

Display zone 2: Vacant

 

Display zone 3: Vacant

 

Display zone 4: Gearbox oil temperature

(readout from gearbox oil temperature sender -G93)

Display range: -40 to 150 C

 

 

Display group 016:

 

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.)

Display range: 0 to 100 %

 

Display zone 2: Vehicle speed

Display range: 0 to ... km/h

 

Display zone 3: Current gearshift program

J 0 - 4: Shift programs for steep downhill slopes

J 5 - 9: Shift programs for gentle downhill slopes

J 10 - 14: Shift programs for level roads

J 15 - 19: Shift programs for minor inclines

J 20 - 24: Shift programs for major inclines

J 25 - 26: Shift programs for Winter driving

J 27: Shift program for Tiptronic function

J 28: Not used

J 29: Shift program in case of increased gearbox temperatures

J 30 - 31: Shift programs for warm-up

J 32: Shift program for urban driving

J 33: Not used

J 34: Shift program for driving with cruise control, steep downhill

J 35: Shift program for driving with cruise control, gentle downhill

J 36: Shift program for driving with cruise control, on level roads

J 37: Shift program for driving with cruise control, minor incline

J 38: Shift program for driving with cruise control, major incline

J 39: Shift program for uphill driving in case of increased gearbox temperatures

J 40: Shift program for Tiptronic function in case of increased gearbox temperatures

J 41 - 45: Shift program for ACC function

 

Display zone 4: Dynamic shift program

J 1 = Gear selection as per drive program

J 8 = Shift position P

J 10 = Shift program low friction coefficient detection

J 12 = Spontaneous vehicle deceleration SVF

J 13 = TCS mode

J 15 = Tiptronic mode

J 16 = CCS (ACC) mode

J 17 = Hot mode

J 18 = Warm-up program

J 20 = Spontaneous downshift

J 26 = Engage gear

 

 

Display group 017:

 

Display zone 1: Control unit run-on

J Run-on active: run-on

J Run-on not active: ----------

 

Display zone 2: Supply voltage terminal 30

Display range: 0 to ... Volts

 

Display zone 3: Supply voltage terminal 15

Display range: 0 to ... Volts

 

Display zone 4: CAN information terminal 15

J Ignition on: Term.15 ON

J Ignition off: Term.15 OFF

J If the CAN information from the entry and start authorisation control unit is missing: ----------

 

 

Display group 071:

 

Display zone 1: Selector lever position

(This display zone indicates the value transmitted from the selector lever electronics via the 2-wire interface to the gearbox electronics.)

J A: A selector lever position P, R, N, D, S is engaged

J M: The selector lever is in the Tiptronic gate

J T-: The selector lever is in the Tiptronic - position

J T+: The selector lever is in the Tiptronic + position

J E1: (fault)

J E2: (fault)

J E3: (fault)

J E4: (fault)

J E5: (fault)

 

Display zone 2: Gear engaged in gearbox

(This display zone indicates the value transmitted from the gearbox control unit via the 2-wire interface to the selector lever electronics. This information is displayed on the selector lever as the engaged position.)

J P

J R

J N

J D

J S

J E6 (fault)

 

Display zone 3: Vacant

 

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 angle sender

J Steer.ang. 0: No CAN connection

J Steer.ang. 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 electric parking brake

J Parking brake 0: No CAN connection

J Parking brake 1: CAN connection OK.

 

Display zone 3: CAN connection steering column electronics

J Steering wheel 0: No CAN connection

J Steering wheel 1: CAN connection OK.

 

Display zone 4: CAN connection, data bus diagnostic interface

J Gateway 0: No CAN connection

J Gateway 1: CAN connection OK.

 

 

Display group 127:

 

Display zone 1: CAN connection, adaptive suspension

J Level 0: No CAN connection

J Level 1: CAN connection OK.

 

Display zone 2: Vacant

 

Display zone 3: Vacant

 

Display zone 4: Vacant

 

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