With Manufacturer's Scan Tool

Engine Speed Signal, Checking

The engine speed sensor signal cannot be used further in its direct form, therefore it is processed by the engine control unit for further consumers. The signal is required, by amongst other things, the automatic gearbox control unit to calculate gear changes and the rev counter in the dash panel.

Special tools and equipment
- Test box VAG 1598/31
- Adapter set VAG 1594
- Hand multimeter VAG 1526 or multimeter VAG 1715
- Wiring diagram

Test sequence
- Remove wiper arms and plenum cover.







- Connect test box VAG 1598/31 to control unit wiring harness.
- Test for open circuit in wiring between dash panel insert and contact 27 on the test box, using wiring diagram.