How to test things without turning a wrench: Vag-Com Scanner.

[NewBeetleMechanic]

Output Diagnostic Test Mode (DTM) (Function 03) up to 6.99

The output Diagnostic Test Mode (DTM) is part of the electrical check. The following components can be checked via the output diagnostic test mode:


•Speedometer
•Tachometer
•Fuel gauge
•Odometer display
•Oil pressure warning buzzer
•Fuel reserve warning light
•Coolant temperature/engine coolant level indicator warning light
•Oil pressure warning light
•Dual brake circuit and parking brake system warning light
•All warning lights for the vehicle optional equipment
•If there is a malfunction during output DTM, replace instrument cluster.
•If no malfunction is identified during output DTM, check wiring and connections to instrument cluster.
Output Diagnostic Test Mode (DTM), initiating

NOTE:


•Output Diagnostic Test Mode (DTM) cannot be initiated or will be interrupted if engine is running or vehicle is moving,
•Use -C- button to exit test sequence at any time.
•Connect VAG 1551 scan tool, select "Rapid data transfer" operating mode 1, switch ignition on, and input "Instrument Cluster" address word 17.
Indicated on display



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -3- to select function 03 "Output Diagnostic Test Mode".
Indicated on display



Rapid data transfer
03 - Output Diagnostic Test Mode Q

•Press -Q- button to confirm input.
No indication on all displays and all warning lights to be checked are unlit.

Indicated on display



Output Diagnostic Test Mode
Analog display ->

After pressing -> button, the following instrumental functional checks will occur simultaneously:


•Tachometer needle moves over complete display range
•Speedometer needle moves over complete display range
•Fuel gauge needle moves over complete display range
After checking movement over display ranges, the following constant values are displayed:


•Tachometer: 3000 RPM
•Speedometer: 100 km/h (65 mph)
•Fuel gauge: 112
•Press -> button.
The analog displays again indicating all actual values.

Indicated on display



Output Diagnostic Test Mode
Warning Lamp Test Combi Instrument ->

The following warning lights light up continuously:


•Coolant temperature/engine coolant level indicator
•Dual brake circuit and parking brake system
•Oil pressure
•Fuel reserve
•Press -> button.
Indicated on display



Output Diagnostic Test Mode
Seat Belt Warning Light - K19 ->

Seat belt warning light -K19- lights

Indicated on display



Output Diagnostic Test Mode
Signal ->

Oil pressure warning buzzer is activated intermittently



•Press -> button.
Indicated on display



Output Diagnostic Test Mode
Segment Test ->

All liquid crystal segments in speedometer display are activated and become visible.



•Press -> button.
Indicated on display



Output Diagnostic Test Mode
ECT Overheat Test ->

Coolant temperature/engine coolant level indicator warning light is activated.

Safety function (high coolant temperature cut-out for the A/C clutch) is activated approx. 5 seconds later.



•Press -> button.
Indicated on display for instrument clusters with manufacturer code M73:



Output Diagnostic Test Mode
END ->

•Press -> button.
All actual values are displayed again.

Indicated on display



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -6- to select function "End Output" function 06.
Indicated on display



Rapid data transfer
06 - End Output Q

•Press -Q- button to confirm input.
Indicated on display



Rapid data transfer
Insert address word XX HELP

The scan tool returns to the start of the program sequence.

[NewBeetleMechanic]

Output Diagnostic Test Mode (DTM), (function 03) from 6.99

The Output Diagnostic Test Mode is part of the electrical check. The following components can be checked by the Output Diagnostic Test Mode (DTM):


•Speedometer
•Tachometer
•Coolant temperature gauge
•Fuel gauge
•Malfunction lamps
•Seat belt warning lamp (when activated using code)
•Buzzer/Gong
•Displays (odometer, multi-function indicator or digital clock, selector lever position display for automatic gearboxes)
•If malfunction is determined when performing Output DTM, exchange instrument cluster.
•If no malfunction is determined when performing Output DTM, check wiring and connections to instrument cluster using wiring diagram.
Output Diagnostic Test Mode (DTM), initiating

NOTE:


•Output Diagnostic Test Mode (DTM) cannot be initiated or will be interrupted if engine is running or vehicle is moving,
•Use -C- button to exit test sequence at any time.
•Connect VAG 1551 Scan Tool (ST), input address word 17 "Instrument cluster".
After control module identification and immobilizer identification number is displayed:



•Press -> button.
Indicated on display (select function):



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -3- to select function 03 "Output Diagnostic Test Mode (DTM)".
Indicated on display



Rapid data transfer
03 - Output Diagnostic Test Mode Q

•Press -Q- button to confirm input. No indication on all displays and all warning lights to be checked are unlit.
Indicated on display



Rapid data transfer
Analog display ->

After pressing -Q- button, the following instrument functional checks are carried out.


•Tachometer needle moves over complete display range
•Speedometer needle moves over complete display range
•Coolant temperature needle moves over complete display range
•Fuel gauge needle moves over complete display range
NOTE:


•On VDO instrument clusters, the instruments are activated simultaneously
•On MMO instrument clusters, the instruments are activated sequentially
After all instrument display range checks, the following constant values are displayed:


Coolant temperature gauge: 90 °C
Tachometer: 3000 rpm
Speedometer: 100 km/h (65 mph)
Fuel gauge: 1/2

•Press -> button.
Indicated on display:



Output Diagnostic Test Mode
Warning lamp test Combi instrument ->

The warning lamps are activated and light continuously (includes all warning lamps for vehicle equipment having output DTM capability coded into the instrument cluster



•Press -> button.
Indicated on display:



Output Diagnostic Test Mode
Seat belt warning lamp - K19 ->

Seat belt warning lamp -K19- lights (when activated by code).



•Press -> button.
Indicated on display:



Output Diagnostic Test Mode
Gong ->

The buzzer/gong is activated and a warning tone is emitted at intervals.



•Press -> button.
Indicated on display:



Output Diagnostic Test Mode
Segment test ->

All liquid crystal segments in the speedometer display and tachometer are activated and appear on the display.



•Press -> button.
Indicated on display:



Output Diagnostic Test Mode
Coolant, excessive temp test ->

VDO Instrument cluster:

No display in instrument cluster!

High coolant temperature cut-out for the A/C clutch is activated approx. 5 seconds later.

MMO Instrument cluster:

Coolant temperature warning lamp lights and warning tone sounds.

High coolant temperature cut-out for the A/C clutch is activated approx. 5 seconds later.



•Press -> button.
Indicated on display for instrument clusters with manufacturer code MMO:



Output Diagnostic Test Mode
END ->

Indicated on display for instrument clusters with manufacturer code VDO:



Function is unknown or
cannot be carried out at the moment ->

End Output Diagnostic Test Mode for VDO instrument clusters by pressing button.
All actual values are displayed again.
Indicated on display (select function):



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -6- to select function 06 "End output".
Indicated on display:



Rapid data transfer
06 - End output Q

•Press -Q- button to confirm entry.
Indicated on display:



Rapid data transfer
Enter address word XX HELP

Tester is again in basic function.

[NewBeetleMechanic]

Measuring Value Blocks (Function 08) Information up to 6.99

Read Measuring Value Block (function 08)

Use this function to observe various instrument cluster inputs.


•Connect VAG 1551 Scan Tool (ST), select operating mode 1 "Rapid data transfer", switch on ignition and input address word 17 "Instrument cluster".
Indicated on display



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -8- to select function 08 "Read Measuring Value Block".
Indicated on display



Rapid data transfer
08 - Read Measuring Value Block Q

•Press -Q- button to confirm input.
Indicated on display



Read measuring value block
Input display group number XXX

[NewBeetleMechanic]

Read Measuring Value Block (function 08) from 6.99

The measuring value block is divided into 4 display groups. The assignment of the individual display fields can be taken from the display group overview. See: Evaluating Measured Value Blocks

Use this function to observe various instrument cluster inputs.


•Connect VAG 1551 Scan Tool (ST), select operating mode 1 "Rapid data transfer", switch on ignition and input address word 17 "Instrument cluster".
After control module identification and immobilizer identification number are displayed:



•Press -> button.
Indicated on display:



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -8- to select function 08 "Read measuring value block".
Indicated on display:



Rapid data transfer
08 - Read Measuring Value Block Q

•Press -Q- button to confirm input.
Indicated on display:



Read Measuring Value Block
Enter display group number XXX Q

•Using the Scan Tool (ST) button pad, enter required display group number (following example shows display group 001).Press keys 0, 0 and 1 for "Display group number 1" and press -Q- button to confirm input.
Indicated on display: (1.. .4 = Display zones)



Read Measuring Value Block 1 ->
1 2 3 4

NOTE:


•Interpreting display groups and evaluating measured values in individual display fields. See: Evaluating Measured Value Blocks
•With printer switched on, information on display is printed out.
•To easily change between display groups, proceed as follows:





•Displayed after pressing -C- button.
Indicated on display:



Read Measuring Value Block
Enter display group number XXX HELP

•Enter display group number as needed.
NOTE:


•Display fields always show actual values transmitted from senders and sensors. However, instrument cluster display values can differ from those in the display fields due to internal filtering.
•Other display groups are possible, but are not required for On Board Diagnostic program!

[NewBeetleMechanic]

Evaluating Measured Value Blocks up to 6.99



•Select relevant display group number, and press -Q- button to confirm input.
Example of measuring value block for Magneti Marelli instrument cluster -M73-:




•Press buttons -0-, -0- and -2- to input display group no.002.
Indicated on display



Read Measuring Value Block 2
820 km 41 | 250 Ohms 19.0 ° ->

NOTE:


•The actual sensor values are shown in the display field. The values in the instrument cluster are modified and may be different.
•The coolant temperature gauge will indicate 90 °C (194 °F) , if the actual coolant temperature varies between approx. 75 °C (167 °F) and 107 °C (225 °F) .
•For vehicles with VDO instrument cluster if the fuel level sensor has an open or short circuit, display field 2 displays 0L and display field 3 remains empty.
•For vehicles with Magneti-Marelli instrument cluster -M73-, display field 2 displays 2L for short circuit and 67L for open circuit Display field 3 displays 8 Ohms for short circuit and > 350 Ohms for an open circuit.
•Other display groups are possible, but are not required for troubleshooting.

[NewBeetleMechanic]

Evaluating Display Group 001 from 6.99

[NewBeetleMechanic]

End Output (Function 06) Information up to 6.99


End Output (function 06)



•Press buttons -0- and -6- to select function "End Output" function 06.
Indicated on display



Rapid data transfer
06 - End Output Q

•Press -Q- button to confirm input.
Indicated on display



Rapid data transfer
Insert address word XX HELP

•Switch ignition off.
•Disconnect Data Link Connector (DLC).

[NewBeetleMechanic]

End Output (function 06) from 6.99



•Press buttons -0- and -6- to select function "End output."
Indicated on display:



Rapid data transfer
06 - End output Q

•Press -Q- button to confirm input.
Indicated on display:



Rapid data transfer
Enter address word XX HELP

•Switch off ignition.
•Disconnect VAG 1551 Scan Tool (ST) from Data Link Connector (DLC).

[NewBeetleMechanic]

Instrument cluster, coding (function 07)


Use this function to code the control module with indicator unit in instrument cluster -J285- with the following information:


•Available equipment
•Market version
•Code number for service intervals
•Code number for distance impulse number ("K" number)
Coding


•Connect VAG 1551 scan tool (ST), select operating mode 1 "Rapid data transfer", switch on ignition and input address word 17 "Instrument cluster".
After control module identification and immobilizer identification number are displayed:



•Press -> button.
Indicated on display:



Rapid data transfer
Select function XX HELP

•Press buttons -0- and -7- to select function 07 "Code control module".
Indicated on display:



Rapid data transfer
07 - Code control module Q

•Press -Q- button to confirm input.
Indicated on display:



Code Control Module
Enter code number XXXXX (0 - 32000)

•Confirm applicable available equipment, model and service interval particulars, determine and enter code number from code table.
Coding example:


03 Code number for vehicle options
2 Code number for country version
0 Code number for service intervals
2 Code number for distance impulse number (K-number)

Code table:




1) If more than one type of available equipment is to be entered, then the code numbers must be added together.

Example:
Brake pad wear indicator & seat belt warning: 01 + 02 = 03

NOTE:


•The distance impulse number is a constant used to calculate speed and distance travelled.
•The distance impulse number (K number) can be read using function 10 "Adaptation".
Indicated on display:



Code Control Module Q
Enter code number 03202 (0 - 32000)

•Press -Q- button to confirm input.
Indicated on display (example only):



1C0920901C A4 COMBI INSTR VDO V04
Coding 03202 WSC 00000 ->

•Press -> button.
Indicated on display:



IMMO-IDENT No.: VWZ7Z0V0066808 ->

•Press -> button.
Indicated on display (select function)



Rapid data transfer
Select function XX HELP

Ending function:


•Press buttons -0- and -6- to select function 06 "End output".
Indicated on display:



Rapid data transfer
06 - End output Q

•Press -Q- button to confirm input.

[NewBeetleMechanic]

When it comes to VW vehicles measuring value blocks is equivalent to other models datastream monitoring.

Measuring value blocks are real-time reportings of an ECU's current state.

The values update continuously and you can monitor the behavior of your ECU while it operates.

The data blocks are used to report information from factory sensors and other interpreted data.

These data blocks can be accessed and logged. From the data gathered, graphs can be made and compared.

This is very useful to track the progress of performance modifications to your car, or to help diagnose problems that may arise.

Each ECU reports one to ten values per data block and each ECU has one or more different blocks.

Older vehicles might have only a few data blocks, but newer vehicles typically have tens, if not hundreds, of data blocks. Each data block is identified by a number between 0 and 255 inclusive. Some common blocks are:

■Basic Functions: Channel 000 to 009
■Ignition System: Channel 010 to 029
■Oxygen Sensor: Channel 030 to 049

■Speed Regulation: Channel 050 to 069

■Emission Reduction: Channel 070 to 079

■Readiness Code: Channel 086 to 089

You can access your measuring blocks using a diagnostic scan tool. Simply log the blocks that you are interested in, and start making graphs and comparisons.