Speedometer Head: Testing and Inspection

The vehicle is equipped with a electronically driven speedometer and odometer assemblies. A signal is sent from a transmission-mounted vehicle speed sensor to the speedometer circuitry through the wiring harness.

Diagnosis of the vehicle speed sensor and circuit, the Chrysler Collision Detection (CCD) data bus, and/or the Powertrain Control Module (PCM) should be performed with a DRB scan tool. For diagnosis of the speedometer, refer to Powertrain Management / Computers and Control Systems / Vehicle Speed Sensor.