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.