October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Speed Sensor
- Raise and support front of vehicle. Insert voltmeter or test light positive probe into Yellow and Black (Accord) or Yellow/Black (Civic and Prelude) wire terminal at control unit connector.
- Connect negative probe to ground. Start engine. Place vehicle in 2nd gear and accelerate slowly. Check for battery voltage as shown in table.
SPEED SENSOR VOLTAGE CHECK
| Speed |
Voltage |
| Accord |
| Below 10 MPH |
Yes |
| Above 20 MPH |
No |
| Civic |
| Below 6 MPH |
Yes |
| Above 12 MPH |
No |
| Prelude |
| Below 11 MPH |
Yes |
| Above 16 MPH |
No |
- If voltage does not correspond to above MPH ranges, install a new speed sensor and retest. If voltage was not present during step 2), check for bad electrical connection, fuse or faulty speed sensor. Replace or repair as necessary and retest.