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Specified display values > < Encoding control unit
Motronic Fuel Injection and ignition system (4-cyl.) 07.96ä
Self-diagnosis
Reading measured value block
  • ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select the engine electronics control unit with the "Address word" 01. When doing this the engine must be running at idle speed
    (Connecting fault reader and selecting control unit for engine electronics .)
 
→ Indicated on display:
Rapid data transfer      HELP
Select function XX
  • ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.
 
→ Indicated on display:
Read measured value block HELP
Enter display group number XX
  • ‒ Enter required display group number and press Q to confirm entry.
 
→ Display readout (for example):
Read measurement block 0    ⇒
1    2    3    4    5    6    7    8    9    10

Display groups

Display group no.

Indicated on display

Designation

00

Read measured value block 00

1

=

Coolant temperature

Basic function

1 2 3 4 5 6 7 8 9 10

2

=

Engine load

3

=

Engine speed

4

=

Battery voltage

5

=

Throttle valve angle

6

=

Control value for idling speed air mass

7

=

Learned value for idling air mass

8

=

Control value for mixture formation (lambda control value)

9

=

Learned value for mixture formation (lambda learned value)

10

=

Learned value for mixture formation (lambda learned value)

Display group no.

Indicated on display

Designation

01

Read measured value block 1

1

=

Engine speed

Basic function

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

3

=

Throttle valve angle

4

=

Ignition timing

02

Read measured value block 2

1

=

Engine speed

Basic function

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

3

=

Injection period (per engine cycle)

4

=

Intake air mass

03

Read measured value block 3

1

=

Engine speed

Basic function

1 2 3 4

2

=

Battery voltage

3

=

Coolant temperature

4

=

Intake air temperature

Display group no.

Indicated on display

Designation

04

Read measured value block 4

1

=

Throttle valve angle

Idling stabilisation

1 2 3 4

2

=

Learned value for idling stabilisation with manual gearbox and with automatic gearbox with no gear engaged

3

=

Learned value for idle stabilisation for automatic gearbox with gear engaged

4

=

Operating status

Idling

Part load

Full throttle

Overrun

Enrichment

05

Read measured value block 5

1

=

Engine speed (actual)

Idling speed

1 2 3 4

2

=

Engine speed (specified)

stabilisation

3

=

Control value for idle stabilisation (idling speed control)

4

=

Intake air mass

Display group no.

Indicated on display

Designation

06

Read measured value block 6

1

=

Engine speed

Idling speed

1 2 3 4

2

=

Control value for idle stabilisation (idling speed control)

stabilisation

3

=

Control value for mixture formation (lambda control)

4

=

Ignition timing

07

Read measured value block 7

1

=

Control value for mixture formation (lambda control)

Lambda control

1 2 3 4

2

=

Lambda probe voltage

3

=

Signal ratio of ACF solenoid 1 -N80

4

=

Correction factor for mixture formation with active fuel tank breather system

08

Read measured value block 8

1

=

Injection period (per engine cycle)

Lambda

1 2 3 4

2

=

Learned value for mixture formation at idling speed (additive)

learned values

3

=

Learned value for mixture formation at part load (multiplicative)

4

=

Fuel tank breather system:

TB active

Fuel tank breather system active

TB not active

Fuel tank breather system not active

λ-Adaptation

Fuel tank breather system not active, learning process for mixture formation in progress

Display group no.

Indicated on display

Designation

09

Read measured value block 9

1

=

Engine speed

Lambda

1 2 3 4

2

=

Control value for mixture formation (lambda control)

learned values

3

=

Lambda probe voltage

4

=

Learned value for mixture formation at idling speed (additive)

10

Read measured value block 10

1

=

Signal ratio of ACF solenoid 1 -N80

Fuel tank

1 2 3 4

2

=

Correction factor for mixture formation with active fuel tank breather system

breather

3

=

Fill level of active carbon canister -N80

4

=

Air from fuel tank breather system as a proportion of total airflow

11

Read measured value block 11

1

=

Engine speed

Fuel

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

consumption

3

=

Speed

4

=

Fuel consumption

Display group no.

Indicated on display

Designation

12

Read measured value block 12

1

=

Engine speed

Fuel

1 2 3 4

2

=

Battery voltage

consumption

3

=

Fuel consumption

4

=

Ignition timing

13

Read measured value block 13

1

=

Ignition timing retardation by knock control, cylinder 1

Knock

1 2 3 4

2

=

Ignition timing retardation by knock control, cylinder 2

system

3

=

Ignition timing retardation by knock control, cylinder 3

4

=

Ignition timing retardation by knock control, cylinder 4

14

Read measured value block 14

1

=

Engine speed

Knock

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

system

3

=

Ignition timing retardation by knock control, cylinder 1

4

=

Ignition timing retardation by knock control, cylinder 2

Display group no.

Indicated on display

Designation

15

Read measured value block 15

1

=

Engine speed

Knock

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

system

3

=

Ignition timing retardation by knock control, cylinder 3

4

=

Ignition timing retardation by knock control, cylinder 4

16

Read measured value block 16

1

=

Knock sensor signal, cylinder 1

Knock

1 2 3 4

2

=

Knock sensor signal, cylinder 2

system

3

=

Knock sensor signal, cylinder 3

4

=

Knock sensor signal, cylinder 4

17

Read measured value block 17

1

=

Engine speed

Catalyst

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

heat-up

3

=

Energy balance for catalyst heating

4

=

Ignition timing

Display group no.

Indicated on display

Designation

18

Read measured value block 18

1

=

Engine speed

Altitude

1 2 3 4

2

=

Engine load without altitude correction

adaptation

3

=

Engine load with altitude correction

4

=

Correction factor for mixture formation based on air density (altitude)

19

Read measured value block 19

1

=

Engine speed

Torque

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

reduction

3

=

Gearbox intervention

1

X

X

(Ignore)

X

0

X

Torque reduction

X

X

1

(Ignore)

4

=

Ignition timing

Display group no.

Indicated on display

Designation

20

Read measured value block 20

1

=

Engine speed

Operating

1 2 3 4

2

=

Selector lever position

statuses

Neutral

Selector lever in position P or N

Gear selected.

Selector lever at 1, 2, 3, D, or manual gearbox

3

=

Air conditioner

A/C low

(Ignore)

4

=

AC compressor

Compr. OFF

Air conditioning compressor off

Compr. ON

Air conditioner compressor on

21

Read measured value block 21

1

=

Engine speed

Operating

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

statuses

3

=

Coolant temperature

Lambda

4

=

Lambda control

system

λ-Control OFF

Lambda control off

λ-ControlON

Lambda control on

Display group no.

Indicated on display

Designation

22

Read measured value block 22

(Ignore)

1 2 3 4

23

Read measured value block 23

1

=

Learning demand display

Throttle valve

1 2 3 4

1

X

X

X

X

X

Potentiometer characteristics learned

valve control

X

0

X

X

X

X

Adaptation to engine control unit completed

unit

X

X

0

X

X

X

Upper stop position learned by throttle valve potentiometer -G69

X

X

X

0

X

X

Lower stop position learned by throttle valve potentiometer -G69

X

X

X

X

0

X

Upper stop position learned by throttle valve actuator -G127

X

X

X

X

X

0

Lower stop position learned by -G127 throttle valve positioner

2

=

Lower stop of throttle valve positioner

3

=

Emergency running stop for throttle valve positioner

4

=

Upper stop of throttle valve actuator

Display group no.

Indicated on display

Designation

24

Read measured value block 24

1

=

Engine speed

Knock

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

system

3

=

Ignition timing

4

=

Total of ignition timing retardation for cylinders 1 to 4

25

Read measured value block 25

1

=

Operating status:

1 2 3 4

Idling

Part load

Full throttle

Overrun

Enrichment

2

=

Setting deviation of Hall sender -G40

3

=

Control:

Intake manifold changeover function

Camshaft timing control

4

=

Active camshaft adjustment angle °KW

Display group no.

Indicated on display

Designation

26

Read measured value block 26

1

=

Engine speed

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

3

=

Control:

Intake manifold changeover function

Camshaft timing control

4

=

Active camshaft adjustment angle °crankshaft

27

Read measured value block 27

1

=

Operating status:

1 2 3 4

Idling

Part load

Full throttle

Overrun

Enrichment

2

=

Setting deviation of Hall sender -G40

3

=

Coolant temperature

4

=

Resistance of lambda probe heating

Display group no.

Indicated on display

Designation

28...94

Vacant

95

Read measured value block 95

1

=

Engine speed

Basic

1 2 3 4

2

=

Engine load (injection period per crankshaft revolution)

function

3

=

Ignition timing

4

=

Coolant temperature

96

Read measured value block 96

(Ignore)

1 2 3 4

97

Read measured value block 97

(Ignore)

1 2 3 4

Display group no.

Indicated on display

Designation

98

Read measured value block 98

1

=

Voltage from throttle valve potentiometer (G69)

Throttle valve

1 2 3 4

2

=

Voltage from throttle valve actuator (G127)

control

3

=

Operating status

unit

Idling

Part load

Full throttle

Overrun

Enrichment

4

=

Adaptation status (ADP = adaptation)

ADP. running

Adaptation in progress

ADP. OK

Adaptation successfully completed

ADP ERROR

An error has occurred in the adaptation process

Display group no.

Indicated on display

Designation

99

Read measured value block 99

1

=

Engine speed

Lambda

1 2 3 4

2

=

Coolant temperature

system

3

=

Control value for mixture formation (lambda control)

4

=

Lambda control

λ-Control OFF

Lambda control off

λ-ControlON

Lambda control on

Specified display values > < Encoding control unit