Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnose any wheel speed sensor DTCs before continuing with the diagnosis of the DTC.
- A deceleration cycle consists of the following sequence:
- The vehicle speed is greater than 24 km/h (15 mph).
- The vehicle decelerates more than 8 km/h/second (5 mph/second) for 2 seconds.
- The vehicle speed decelerates to less than 16 km/h (10 mph).
- Verify proper stop lamp switch operation using the data list of the scan tool. As the brake is applied, the data list displays the stop lamp switch on within 2.54 cm (1 in) of travel.
- Possible causes of this DTC are the following conditions:
- An open stop lamp switch
- The stop lamp switch is misadjusted
- An open fuse
- Circuit has a wiring problem, terminal corrosion, or poor connections
- Erratic wheel speeds