Crankshaft Position Sensor — Checking and Replacement (Honda Civic 3)

Contents: Models before 1988 ⇊ Models since 1988 ⇊ Replacement ⇊

Models before 1988

1. On these models, the angular position sensor consists of two individual sensors: "TDC" and "cylinder". The "cylinder" sensor determines the position of the first cylinder as a base for counting the injection sequence. The TDC sensor determines the injection start angle and generates a signal about the engine speed for the ECU.

2. To check the "cylinder" sensor, disconnect the distributor connector and measure the resistance between the white and red contacts of the connector. Compare the measurement data with the values given in the specification.

3. To check the TDC sensor, disconnect the distributor connector and measure the resistance between the brown and blue contacts of the connector. Compare the measurement data with the values given in the specification.

Models since 1988

4. Turn off the ignition.

5. Remove the "HAZARD" fuse from the fuse panel for 10 seconds to reset the ECU memory.

6. Start the engine and make sure that the indicator "CHECK ENGINE" blinking.

7. Stop the engine and disconnect the electrical connector at the distributor.

8. For a two-point injection system, measure the resistance between terminals D and E, then between B and C (see fig. 5.8a). For multi-point injection, measure the resistance between terminals C and D, then A and B (see fig. 5.8b). Compare the instrument readings with the specification data.

Fig. 5.8a. Distributor connector contacts arrangement for two-point injection

Fig. 5.8b Location of distributor connector contacts for multi-point injection

9. Check the conductivity from contacts E, D, B and C (two-point injection) or from contacts C, D, A and B (multipoint injection) to the "mass". There should be conductivity.

10. If the ECU lamps display code 9, measure the resistance between terminals F and G. Compare with the specification data.

11. Check the conductivity from contacts F and G to ground. There should be conductivity.

12. If you have any difficulties, contact a service station.