DTC Troubleshooting: P0718 (15-6) (A/T)

DTC Troubleshooting: P0718 (15-6)

DTC P0718:

Mainshaft Speed Sensor Intermittent Failure

NOTE:

Record all freeze data and review General Troubleshooting Information before you troubleshoot.
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1.	Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS.

Test-drive the vehicle for 10 minutes under the same conditions as those indicated by the freeze data, and check the OBD STATUS in DTCs MENU for a pass/fail test of code P0718.

Did the result fail?

YES - Go to 3.

NO - Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETE, return to step 2 and recheck.n

3.	Turn the ignition switch OFF.

4.	Disconnect the mainshaft speed sensor connector, and inspect the connector and connector terminals to be sure they are making good contact. Are the connector terminals OK? YES - Go to 5. NO - Repair the connector terminals, then go to 5.

5.	Connect the mainshaft speed sensor connector.

6.	Test-drive the vehicle for several minutes, and check the OBD STATUS in DTCs MENU for a pass/fail test of code P0718. Did the result fail? YES - Go to 7. NO - The problem has been corrected. If the tester indicates NOT COMPLETE, return to step 6 and recheck.n

7.	Turn the ignition switch OFF.

8.	Jump the SCS line with the Honda PGM Tester or HDS.

9.	Disconnect PCM connector C (22P).

10.	Disconnect the mainshaft speed sensor connector.

11.	Check for continuity between the No. 2 terminal of the mainshaft speed sensor connector and body ground. Is there continuity? YES - Repair short to ground in the wire between PCM connector terminal C19 and the mainshaft speed sensor connector.n NO - Go to 12.

12.	Reconnect PCM connector C (22P).

13.	Turn the ignition switch ON (II).

14.

Measure the voltage between the No. 2 terminal of the mainshaft speed sensor connector and body ground.

Is there about 5 V?

YES - Replace the mainshaft speed sensor. After replacing the sensor, go to 15, and check that the repair has been completed.

NO - Check for loose or poor connections at PCM connector terminal C19 or an open in the wire between PCM connector terminal C19 and the mainshaft speed sensor connector. If the wire is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.n

15.	Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS.

16.	Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data.

17.	Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0718. Did the result pass? YES - The problem has been corrected.n NO - Return to step 1 and recheck.n