DTC Troubleshooting

DTC Troubleshooting: P0723 (9)

DTC P0723: Output Shaft (Countershaft) Speed Sensor (Intermittent Failure)

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information. How to Troubleshoot A/T Systems

- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1. Record all freeze data, and clear the DTC with the HDS.

2. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through all five gears under the same conditions as those indicated by the freeze data. Slow down and stop the wheels.

3. Monitor the OBD STATUS for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and the PCM. If the HDS indicates NOT COMPLETED, return to step 2 and recheck.


4. Turn the ignition switch to LOCK (0).

5. Disconnect the output shaft (countershaft) 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 step 6.

NO - Repair the connector terminals, then go to step 6.


6. Connect the output shaft (countershaft) speed sensor connector.

7. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through all five gears under the same conditions as those indicated by the freeze data. Slow down and stop the wheels.

8. Monitor the OBD STATUS for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?
YES - Go to step 9.

NO - The troubleshooting is complete. If the HDS indicates NOT COMPLETED, return to step 7 and recheck.


9. Turn the ignition switch to LOCK (0).

10. Jump the SCS line with the HDS.

11. Disconnect PCM connector B (24P).

12. Disconnect the output shaft (countershaft) speed sensor connector.

13. Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.

Is there continuity?
YES - Repair short in the wire between PCM connector terminal B19 and the output shaft (countershaft) speed sensor connector, then go to step 26.

NO - Go to step 14.






14. Connect PCM connector B (24P).

15. Turn the ignition switch to ON (II).

16. Measure the voltage between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.

Is there about 5 V?
YES - Replace the output shaft (countershaft) speed sensor, A/T Output Shaft (Countershaft) Speed Sensor Replacement then go to step 26.

NO - Go to step 17.






17. Turn the ignition switch to LOCK (0).

18. Jump the SCS line with the HDS.

19. Disconnect PCM connector B (24P).

20. Check for continuity between PCM connector terminal B19 and output shaft (countershaft) speed sensor connector terminal No. 2.

Is there continuity?
YES - Go to step 21.

NO - Repair open in the wire between PCM connector terminal B19 and the output shaft (countershaft) speed sensor, then go to step 26.






21. Reconnect all connectors.

22. Update the A/T software in the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM. How to Troubleshoot A/T Systems

23. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through all five gears at speeds over 12 mph (20 km/h). Slow down and stop the wheels.

24. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0723 indicated?
YES - If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then recheck. If the PCM was substituted, go to step 1.

NO - Go to step 25.


25. Monitor the OBD STATUS for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other DTCs were indicated on step 24, go to the indicated DTC's troubleshooting.

NO - Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and the PCM. If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 23 and recheck.


26. Reconnect all connectors.

27. Clear the DTC with the HDS.

28. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through all five gears at speeds over 12 mph (20 km/h). Slow down and stop the wheels.

29. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0723 indicated?
YES - Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and the PCM, then go to step 1.

NO - Go to step 30.


30. Monitor the OBD STATUS for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated on step 29, go to the indicated DTC's troubleshooting.

NO - Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 28 and recheck.