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Vehicle Speed Sensor (VSS)

  1. Verify fuse No. 1 in underdash fuse block is okay. Speed sensor is located next to oil filter. Unplug 3-pin connector from speed sensor.
  2. Check for continuity between Black wire and ground. If continuity exists, go to next step. If continuity does not exist, repair open between speed sensor and body ground.
  3. With ignition on, measure voltage between Yellow wire and ground. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Yellow wire between speed sensor and underdash fuse block.
  4. Measure voltage between Yellow/Red wire and ground. If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, repair short to ground in Yellow/Red wire.
  5. Reconnect wiring to speed sensor. Raise and support vehicle. Connect voltmeter between Orange wire of sensor connector and ground. With ignition on and transaxle in Neutral, block one front wheel and slowly rotate other front wheel. If voltage does not pulse between zero and 5 volts, replace speed sensor.
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