Wheel Speed Sensor, Checking
Display group 002
The measured value block for display group 002 must be read when the vehicle is being driven slowly. ABS Control Module -J104- (w/EDL) saves the first usable voltage signal from the wheel speed sensor and displays this value in the display group. The values are displayed on the Scan Tool VAG1551 when the vehicle is being driven slowly.
-- Press buttons 0 , 0 and 2 to input display group number 2 "002".
-- Press Q button to confirm input.
There are always 4 display fields -arrows- in the display group. Descriptions of the individual values in display fields 1 - 4 can be found in the table WHEEL SPEED SENSOR, CHECKING => Read Measuring Value Block 2 .
| Read Measuring Value Block 2 -> -> 1 -> 2 -> 3 -> 4 |
Indicated on display (vehicle stationary)
| Read Measuring Value Block 2 -> 255 km/h 255 km/h 255 km/h 255 km/h |
-- Press C button for next display group number entry.
If the → button is pressed, buttons 0 and 8 ("Read Measuring Value Block") must be pressed again to regain entry.
For display group number 002 remember:
The reading of measured value blocks in display group number 002 must be undertaken when driving off slowly. Then the ABS Control Module -J104- (w/EDL) will store the first usable voltage signals provided by the speed sensors and display these as a fixed value in the measured value block.
| Read Measuring Value Block 2 | → | Display group 002 | ||
| 3 km/h1) | 6 km/h1) | 2 km/h1) | 1 km/h1) | Indicated on display (when driving slowly) |
Wheel speed at right-rear wheel speed sensor
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Wheel speed at left-rear wheel speed sensor
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Wheel speed at right-front wheel speed sensor
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Wheel speed at left-front wheel speed sensor
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| 1) If the deviations in display fields 1 - 4 are greater than 6 km/h (4 mph), the following may be cause of the malfunction: Air gap between wheel speed sensor and rotor may be too large. -- Check that wheel speed sensor is screwed correctly to wheel bearing housing. Wheel speed sensor or rotor exterior damaged. -- Change damaged component. | ||||
For display group 002 remember: Deviations of the displayed values in display fields 1 - 4 must never be greater than 6 km/h (4 mph).