Reading Measuring Value Blocks

Safety precautions
If special testing equipment is required during test drive, note the following:
- Test equipment must always be secured to the rear seat and operated from there by a second person.

If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in the event of an accident involving deployment of the passenger-side airbag.

Read Measuring Value Block (scan tool funtion 08)
- VAG1551 Scan Tool with VAG1551/3 Adapter

Test requirements
- Coolant temperature must be at least 80 °C, See Display group 04, display field 3
- All electrical consumers like, for example, lights and rear window heating must be switched off.
- If vehicle is equipped with an A/C system, it must be switched off.
- For vehicles with automatic transmission, selector lever must be in -P- or -N-.
- There must not be any DTCs stored in DTC memory. Refer to "Displaying, Reading and Erasing Trouble Codes", Testing and Inspection

Work procedure
- Connect VAG 1551 scan tool (VAG1552). Start engine and select the Engine Control Module (ECM) using address word 01 (connecting scan tool and selecting ECM). Refer to "VAG 1551 Scan Tool", [1][2][3][4][5]Connecting VAG 1551 Scan Tool

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.

Indicated on display


Read Measuring Value Block HELP
Input display group number XXX


- Select desired display group number.

NOTE: Display group number 1 is used as an example to indicate procedure.

- Press buttons -0-, -0- and -1 - to select "Display group number 1". Press -Q- button to confirm input.

Indicated on display (1-4 = display fields)


Read Measuring Value Block 1 ->
1 2 3 4







- If specified values are obtained in all display fields, press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- to select "End data transfer" function 06. Press -Q- button to confirm input.


NOTE: Measuring value blocks not described in this chapter are under development and production at the moment. Indicated values are not relevant for troubleshooting in service stations.