Chart A-13, Codes 45/46/47/48 - Missing Wheel Sensor Signal
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
- The EBCM compares wheel speed sensor signal to expected values and the output of the other wheel speed sensors. When a missing signal is detected, the EBCM will set one of these codes.
- Code 45 for left front wheel AND one other signal missing. It is impossible to determine from code information WHICH second signal is missing.
- Code 46 for right front wheel AND one other signal missing. It is impossible to determine from code information WHICH second signal is missing.
- Code 47 both left AND right rear wheel signals are missing. This code may be set if the car is on a hoist and front wheels spin (engine running and in gear). The "ANTI-LOCK" lamp may or may not remain on, depending on type of failure.