Diagnostic Aids

Code 24 can set if speedometer is binding. Ensure speedometer cable is free from restrictions and has a secure connection to instrument cluster assembly. Ensure all electrical connections are secure and all wires are free of opens and shorts.

NOTE: Ensure diagnostic service check has been performed and check speedometer cable operation before continuing diagnosis.

Fig 1: Vehicle Speed Sensor Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: Vehicle Speed Sensor Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 3: Vehicle Speed Sensor Terminal ID

Courtesy of GENERAL MOTORS CORP.