Transmission
DTC P0722: Problem in Output Shaft (Countershaft) Speed Sensor Circuit (No Signal Input)NOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Clear the DTC with the HDS.
2. Check for proper output shaft (countershaft) speed sensor installation.
3. Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle on a hoist
4. Start the engine, run the vehicle in the D position with engine speed 2,000 rpm or higher for more than 10 seconds. Slow down and stop the wheels.
5. Monitor the OBD status for P0722 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate FAILED?
YES - Go to step 6.
NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections at the PCM and the output shaft (countershaft) speed sensor connectors. If the HDS indicates NOT COMPLETED, return to step 4 and recheck.
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect PCM connector A (31P).
9. Check for continuity between PCM connector terminal A8 and body ground, and between terminal A9 and body ground.
Is there continuity?
YES - Go to step 10.
NO - Repair open in the wires between PCM connector terminals A8, A9, and ground (G101), or repair a poor ground (G101), then go to step 33.
10. Connect PCM connector A (31P).
11. Disconnect the output shaft (countershaft) speed sensor connector.
12. Turn the ignition switch ON (II).
13. Measure voltage between output shaft (countershaft) speed sensor connector terminal No. 1 and body ground.
Is there about 5 V?
YES - Go to step 18.
NO - Go to step 14.
14. Measure voltage between PCM connector terminals A21 and A9.
Is there about 5 V?
YES - Repair open in the wire between the output shaft (countershaft) speed sensor and PCM connector terminal A21, then go to step 33.
NO - Go to step 15.
15. Turn the ignition switch OFF.
16. Disconnect the PCM connector A (31P).
17. Check for continuity between PCM connector terminal A21 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the output shaft (countershaft) speed sensor and PCM connector terminal A21, then go to step 33.
NO - Go to step 36.
18. Turn the ignition switch OFF.
19. Disconnect PCM connector A (31P).
20. Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between PCM connector terminal A18 and output shaft (countershaft) speed sensor, then go to step 33.
NO - Go to step 21.
21. Check for continuity between PCM connector terminal A24 and output shaft (countershaft) speed sensor connector terminal No. 3.
Is there continuity?
YES - Go to step 22.
NO - Repair open in the wire between the output shaft (countershaft) speed sensor and PCM connector terminal A24, then go to step 33.
22. Connect PCM connector A (31P).
23. Turn the ignition switch ON (II).
24. Measure voltage between output shaft (countershaft) speed sensor connector terminals No. 2 and No. 3.
Is there about 5 V?
YES - Go to step 27.
NO - Go to step 25.
25. Turn the ignition switch OFF.
26. Check for continuity between PCM connector terminal A18 and output shaft (countershaft) speed sensor connector terminal No. 2.
Is there continuity?
YES - Go to step 36.
NO - Repair open in the wire between PCM connector terminal A18 and the output shaft (countershaft) speed sensor, then go to step 33.
27. Turn the ignition switch OFF.
28. Connect the output shaft (countershaft) speed sensor connector.
29. Turn the ignition switch ON (II).
30. Measure voltage between PCM connector terminals A18 and A9.
Is the voltage 0 V or about 5 V?
YES - Go to step 31.
NO - Replace the output shaft (countershaft) speed sensor, then go to step 33.
31. Shift to the P position. Start the engine, and let it idle.
32. Shift to the D position, and allow the wheels to rotate, measure voltage between PCM connector terminals A18 and A9.
Is there 1.5 - 3.5 V?
YES - Go to step 36.
NO - Replace the output shaft (countershaft) speed sensor, then go to step 33.
33. Clear the DTC with the HDS.
34. Start the engine, run the vehicle in the D position with engine speed 2,000 rpm or higher for more than 10 seconds. Slow down and stop the wheels.
35. Monitor the OBD status for P0722 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate PASSED?
YES - Troubleshooting is complete.
NO - Check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the PCM, then go to step 1.
36. Update the PCM if it does not have latest software, or substitute a known-good PCM.
37. Start the engine, run the vehicle in the D position with the engine speed 2,000 rpm or higher for more than 10 seconds. Slow down and stop the wheels.
38. Monitor the OBD status for P0722 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.
NO - If the PCM was updated and screen indicates FAILED, substitute a known-good PCM, then go to step 37. If the PCM was substituted, check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the PCM, then go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 37.