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Vehicle Speed Sensor

WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Vehicle speed sensor signal is input to speedometer sensor in combination meter, then output to PCM.
  1. Disconnect negative battery cable. Disconnect vehicle speed sensor connector. Remove vehicle speed sensor. Measure voltage between sensor terminals while rotating driven gear. See Fig 1.
  2. Voltage reading should fluctuate about 5 volts. If voltmeter needle does not fluctuate as specified, replace sensor. If voltmeter needle fluctuates as specified, sensor is okay.
Fig 1: Testing Vehicle Speed Sensor
G96C19168Courtesy of MAZDA MOTORS CORP.
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