Code 73 (Vehicle Speed Signal)
VEHICLE SPEED SIGNALExplanation
This defect code is stored when, despite high load and engine speed, no vehicle speed signal is applied.
Effect of Defect
- For manual transmission: Irregularities at engine speeds close to the idle speed (Electronic Throttle Control (EML) controls the idle speed).
- Power loss (EML limits the throttle angle).
- Cruise Control (FGR) failure.
Troubleshooting
- If vehicle speed signal is present at instrument cluster: Check wire from Digital Motor Electronic (DME) Pin 73 to Electronic Body Module (EKM).
- Otherwise: Check wire from instrument cluster to reed contact at the differential.