Speed Sensor

Remove speedometer from instrument cluster. Connect an ohmmeter between terminals "1L" and "2A" at the 2 printed circuit connectors. Rotate the speedometer drive cable. Ensure a continuity pulse cycle of 4 times per revolution. If continuity does not cycle 4 times per revolution, replace speed sensor. If pulse cycles are okay, check wiring circuits between speedometer and control unit. If wiring is okay, suspect a faulty control unit.

Fig 1: Testing Actuator

Courtesy of MAZDA MOTORS CORP.

Fig 2: Testing Control Switches

Courtesy of MAZDA MOTORS CORP.

Fig 3: Checking Control Unit Voltage

Courtesy of MAZDA MOTORS CORP.

Fig 4: MPV Wiring Diagram

Courtesy of MAZDA MOTORS CORP.