Test sequence
WARNING: This page is about a different variant/trim than selected.
- Connect the Scan Tool VAG1551 ( VAG1552 ) and with ignition switched on select engine electronics control unit with the "Address word" 01. (Connecting Scan Tool and selecting engine electronics control unit → Scan Tool VAG1551 , connecting .)
Indicated on display:
| Rapid data transfer HELP Select function XX |
- Press buttons 0 and 8 for the function "Read measured value block" and confirm entry with Q button.
Indicated on display:
| Read measured value block Enter display group number XXX |
- Press buttons 0 , 0 and 6 for "Display group number 6" and confirm entry with Q button.
- Observe display in display field 2.
Specification: 0 0 0
| Read measured value block 6 → 0 km/h 0 0 0 000000 255 |
- Operate brake pedal slowly.
Specification: 0 1 1 Both displays must change from 0 to 1 at same time.
| Read measured value block 6 → 0 km/h 0 1 1 000000 255 |
- Center display = Brake pedal switch
- Right-hand display = Brake light switch
- Release brake pedal slowly into rest position again.
Both displays must change from 1 to 0 again.
| Read measured value block 6 → 0 km/h 0 0 0 000000 255 |
- Press → button.
- Press buttons 0 and 6 for the function "End output" and confirm entry with the Q button.
- Switch off ignition.
If one or both displays do not change:
- Check switches or wiring to the switches: → Electrical Wiring Diagrams, Troubleshooting and Component Locations
If brake light switch is replaced:
- Press the pedal 3 times to ensure the correct adjustment of the switch.
- Verify that the switch is working properly → Brake light switch F and Brake Pedal Switch F47 , checking .