Procedure

NOTE: When performing this test, refer to the corresponding test table. Test Tables (Measuring Block Values)

PROCEDURE
- The measuring value block consists of one display group of four measured values with physical units, and one display group of measured values without physical units.
- If the printer is on, the display is also printed out on the test log.
- Ensure basic preparation has been done. Basic Preparation
- Ensure Diagnostic Trouble Code (DTC) memory has been checked and any malfunctions displayed have been located and rectified. Connecting VAG 1551 Scan Tool
- Connect scan tool No. VAG 1551 with diagnostic cable tool No. VAG 1551/3, or equivalent. Connecting VAG 1551 Scan Tool
Indicated on display:

V.A.G. On Board Diagnostic HELP
1-Rapid data transfer
2-Blink code output

- Press button 1 for "Rapid data transfer" operating mode.
Indicated on display:

Rapid data transfer HELP
Insert address word XX

- Press buttons 0 and 3 to select "Brake Electronics" function 03.
Indicated on display:

Rapid data transfer Q
03-Brake Electronics

- Press Q button to confirm input.
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
Input display group number XXX

- Press buttons 0, 0 and 1 to input display group 001.

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

(1) (2) (3) (4)

NOTE:
^ Display fields 1 to 4 of display group 001 indicate the wheel speed in km/h. It is calculated by the ABS control module on the basis of the pulses received from the wheel speed sensor.
^ If the vehicle is accelerated or moved uniformly on a dry road surface, the permissible difference between the readouts 1 to 4 is not more than + 1 km/h (rounding error).
^ If the differences are greater, check the wheel speed sensors and rotors.
^ Check that the wheel speed sensors are properly connected to the correct wheel by rotating the wheels by hand. Lock the other driven wheels to prevent them from turning.
^ If the readouts obtained indicate malfunctions, carry out the resistance measurements, electrical test steps 7 to 10. Component Tests and General Diagnostics

- When all conditions are correct, press the ARROW button.
Indicated on display:

Read measuring value block HELP
Input display group number XXX

- Press buttons 0, 0 and 2 to input display group 002.

- Press Q-button to confirm input.

- Indicated on display:

(5) (6) (7) (8)

NOTE: Display fields 5 through 8 provide indications of the switching states of system.

- When testing is complete. press ARROW button.
- Select Function 06, End Output. Function 06-End Output