Engine Speed Signal, Checking

NOTE: The Engine speed signal (RPMs) is output at ECM terminal 6. This signal is required by the Transmission Control Module (TCM) to calculate shift points. The vehicle tachometer also requires this signal for its' display.


Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
- VAG 1598/22 Test Box
- VW 1594 Adaptor kit
- Fluke 83 multimeter
- Wiring diagram

Test sequence

- Connect VAG 1598/22 Test Box to ECM harness connector.







- Check for open circuit in wiring between instrument cluster and terminal 6 on Test Box using Wiring diagram
- Display Readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If DTC memory has been erased
- Create Readiness code. Monitors, Trips, Drive Cycles and Readiness Codes