Vehicle Speed Sensor: Legend
- Ensure 20-amp fuse No. 22 in underdash fuse box is okay. Disconnect 3-pin connector from speed sensor. Speed sensor is located next to oil filter.
- Using an ohmmeter, check for continuity between Green/White wire and ground. See Fig 1
. If continuity exists, go to next step. If continuity does not exist, repair open between speed sensor and ECU ground. ECU ground is located next to throttle body.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- With ignition on, measure voltage between Black/Yellow wire and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair open in Black/Yellow wire between speed sensor and underdash fuse box.
- Measure voltage between Yellow/Red wire and ground. If voltage reading is about 5 volts, go to next step. If voltage is not 5 volts, repair Yellow/Red wire for short to ground.
- Reconnect speed sensor connector. Raise and support vehicle. Connect voltmeter between Yellow/Red wire of sensor connector and ground. With ignition on and transaxle in neutral, block one front wheel and slowly rotate other front wheel. Voltage should pulsate between zero and 5 volts. If voltage is not between zero and 5 volts, replace speed sensor.