Engine Speed Signal, Checking

Engine Speed Signal, Checking

Special Tools and Equipment







- VAG1526A
- VAG1527B
- VAG1594A
- VAG1598/31
- VAS5051 with VAG505/1
- or
- VAG1551 with VAG155/3B


NOTE: The engine speed signal is output at terminal 37 of the Engine Control Module (ECM). The signal is used, among other things, for RPM display in the instrument cluster.


- Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. Refer to Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/31 Test Box Testing and Inspection
- Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:

Test box VAG 1598/31 Socket Instrument Cluster Terminal
37 -

- Repair open circuit or short circuit if necessary.