Reading

Read Measuring Value Block (function 08)

Use this function to observe status of communication between control modules via the CAN Bus..

The measuring value block is divided into 2 display groups, each containing 4 display fields.

- Connect VAG 1551, select operating mode 1 "Rapid data transfer", switch on ignition and enter address word 17 "instrument cluster".
- Press -Q- button to confirm input.
- Press -> button until "Select function" is displayed.

Indicated on display:


Rapid data transfer HELP
Select function XX


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

Indicated on display:


Rapid data transfer Q
08 - Read Measuring Value Block


- Press -Q- button to confirm input.

Indicated on display:


Read Measuring Value Block HELP
Enter display group number XXX


- Using the Scan Tool (ST) button pad, enter the required display group number (following example shows display group 001).
- Press -Q- button to confirm input.

Indicated on display: (1...4 = Display fields)


Read Measuring Value Block 1 ->
1 2 3 4







- Displayed after pressing C button.

Indicated on display:


Read Measuring Value Block HELP
Enter display group number XXX


- Enter alternate display group number as needed See tables beginning, Interpreting Display Groups


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!

- Display fields in display groups 125 and 126 provides the CAN-Bus function status codes of various control modules connected to the "Powertrain" CAN-Bus network.
- If a vehicle is not equipped with control module(s) listed in the following display groups, the applicable display field remains blank. Check correct coding of CAN-Bus On Board Diagnostic (OBD) interface -J533-. Programming and Relearning