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_4B_37_01L_1_0303_21_codieren.htm
J217_4B_37_01L_2_0303_21_codieren.htm
J217_4B_37_01V_1_0901_21.htm
J217_4B_37_____1_0500.htm
J217_4B_37_____1_1297.htm
J217_4B_38_01J_1_0304_21_MWB_lesen.htm
J217_4B_38_01J_1_0304_21_RdW_codieren.htm
J217_4B_38_01J_2_0304_21_USA_codieren.htm

Reading measured value block

 

Audi A6 1998> - multitronic 01J

From model year 1998

 

The following measured value blocks can be displayed:

 

Display group 001:

Display zone 1: Brake light switch

(Brake not pressed: Bls. OFF;

Brake pressed: Bls. ON)

Display zone 2: Brake test switch

(Brake not pressed: Bts.OFF;

Brake pressed: Bts.ON)

Display zone 3: Selector lever lock solenoid -N110

(No current applied to magnet (selector lever positions R, D, and S): PN inactive;

Current applied to magnet (selector lever positions P and N): PN active)

Display zone 4: Speed

(xxx km/h)

 

Display group 002:

Display zone 1: Selector lever position

(P; ZP; R; ZN; N; D; S;

In case of fault: Er)

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

(P: 0 1 0 1;

ZP: 0 1 0 0;

R: 0 1 1 0;

ZN: 0 0 1 0;

N: 0 0 1 1;

D: 1 0 1 0;

S: 1 0 0 0)

Display zone 3: Tiptronic switch -F189, recognition

(Selector lever not in Tiptronic gate: unpressed;

Selector lever in Tiptronic gate: M-shift)

Display zone 4: Engaged gear

(P; R; N; D; S;

in Tiptronic mode 1; 2; 3; 4; 5; 6; 7)

 

Display group 003:

Display zone 1: Selector lever position

(P; ZP; R; ZN; N; D; S;

In case of fault: Er)

Display zone 2: Tiptronic switch -F189, recognition

(Selector lever not in Tiptronic gate: unpressed;

Selector lever in Tiptronic gate: M-shift)

Display zone 3: Tiptronic switch -F189, upshift

(Selector lever not in position '+': unpressed;

Selector lever in position '+': Upshift)

The Tiptronic switches in the steering wheel can also be checked in this display zone.

Display zone 4: Tiptronic switch -F189, downshift

(Selector lever not in position '-': unpressed;

Selector lever in position '-': Downshift)

The Tiptronic switches in the steering wheel can also be checked in this display zone.

 

Display group 004:

Display zone 1: Selector lever position

(P; ZP; R; ZN; N; D; S;

In case of fault: Er)

Display zone 2: Direction indicator

(Forward;

Reverse;

Not recognised)

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

(P; ZP; R; ZN; N; D; S;

In case of fault: Er)

Display zone 2: Signal for starter inhibitor

(Selector lever position P, N: Term.50 on;

Selector lever position R, D, S: Term.50 off)

Display zone 3: Signal for reversing light

(Selector lever position R: Relay on;

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

(P; ZP; R; ZN; N; D; S;

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)

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

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

Asynchronous mode: AS, signifying that the forward/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

(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)

Display zone 4: Actual gearbox input speed

(0 to 7000 rpm)

 

Display group 009:

Display zone 1: Accelerator pedal value

(0% to 100%)

Display zone 2: Kickdown switch

(Kickdown switch unpressed: unpressed;

Kickdown pressed: Kickdown)

Display zone 3: Engine torque

(xxx Nm)

Display zone 4: Engine speed

(0 to 7000 rpm)

 

Display group 010:

Display zone 1: Adaption of clutch characteristic, forward

(0.2 A to 0.35 A)

Display zone 2: Adaption of starting, forward

(Adaption in progress: ADP. runs;

Adaption successful: ADP OK)

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

(min. -60 C; max. 160 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

(Adaption in progress: ADP. runs;

Adaption successful: ADP OK)

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

(min. -60 C; max. 160 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, minimum torque

(0.2 A to 0.35 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)

(min. -60 C; max. 160 C)

Display zone 4: Coolant temperature

(xxx C)

 

Display group 014:

Display zone 1: Adaption of clutch characteristic forward, minimum torque

(min. 0.2 A, max. 0.35 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

(at least 13, maximum 12)

Display zone 2: Overdrive transmission ratio

(at least 2.5, maximum 3)

Display zone 3: Disk set control, track reinforcement

(at least 10, maximum 180)

Display zone 4: Current transmission ratio

 

Display group 017:

Display zone 1: Accelerator pedal value

(0% to 100%)

Display zone 2: Engine speed

(0 to 7000 rpm)

Display zone 3: Engine torque

(xxx Nm)

Display zone 4: Specified clutch torque

(xxx Nm)

 

Display group 018:

Display zone 1: Torque sensor pressure

(xxx 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 3: Current in pressure regulating valve 1 -N215

(xxx A)

Display zone 3: Status of air conditioner

(Compressor on: Compr.ON,

Compressor off: Compr.OFF)

Display zone 4: Vacant

 

Display group 020:

Display zone 1: Engine speed

(0 to 7000 rpm)

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

(ABS active/ABS n. active)

Display zone 2: EDL active/not active

(EDL active, EDL n. active)

Display zone 3: TCS active/not active

(TCS active/TCS n. active)

Display zone 4: ESP active/not active

(ESP active, ESP n. active)

 

Display group 023:

Display zone 1: MSR (overrun torque limitation) active/not active

(active, inactive)

Display zone 2: Disk set overpressing active/not active

(active, inactive)

Display zone 3: Clutch overpressing active/not active

(active, inactive)

Display zone 4: Vacant

 

Display group 024:

Display zone 1: MIL request

(MIL lamp on: MIL on,

(MIL lamp off: MIL off)

Display zone 2: Transfer function

(0 to 25.4)

Display zone 3: Motion resistance index

(-31.6 to 31.6)

Display zone 4: CAN software status

(greater than or equal to 45)

 

Display group 025:

Display zone 1: (xx bar)

Display zone 2: (min: 50%; max: 100%)

Display zone 3: (min: 0.300A; max: 0.500A)

Display zone 4: (max: 0.100A)

 

Display group 026:

Display zone 1: Operating status

To software release 41xx: (Normal state: A special character is displayed;

Run-on: No readout)

From software release 42xx: (Normal state: No readout;

Run-on: Run-on)

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 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 groups 080 to 082:

For explanatory notes see test program: J217 - Multitronic, control unit version (Rep.Gr. 38)

 

Display group 125:

Display zone 1: CAN messages, engine control unit (Engine 0: No CAN connection to engine control unit, Engine 1: CAN connection to engine control unit OK)

Display zone 2: CAN messages ABS control unit (ABS 0: No CAN connection to ABS control unit, ABS 1: CAN connection to ABS control unit OK)

Display zone 3: CAN messages, steering column electronics (Steering wheel 0: No CAN connection to steering column electronics, Steering wheel 1: CAN connection to steering column electronics OK)

Display zone 4: CAN messages dash panel insert (Combi 0: No CAN connection to engine control unit, Combi 1: CAN connection to dash panel insert OK)

 

Display group 126:

Display zone 1: Vacant

Display zone 2: Vacant

Display zone 3: Vacant

Display zone 4: Vacant

 

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