Circuit/System Testing
WARNING: This page is about a different car, the 2007 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Test drive the vehicle. Verify the vehicle speedometer is operating properly.
- If the speedometer is inaccurate or inoperative, go to Speedometer and/or Odometer Inaccurate or Inoperative .
- Test or repair open circuit on the vehicle speed sensor circuit to the radio.
- If all circuits test normal, replace the ECM.