Code 24 - Vehicle Speed Sensor

NOTE: Test numbers refer to numbers on diagnostic chart.

Code 24 will set if vehicle speed is less than 3 MPH when engine is running, Code 29 and 31 are not set, vehicle is in 4th gear and all conditions have been met for 2-40 seconds.
Before replacing control unit, check MEM-CAL for correct application.

Fig 1: Code 24 Schematic Vehicle Speed Sensor

Fig 2: Code 24 Flow Chart Vehicle Speed Sensor