P0722
DTC P0722: Problem in Output Shaft (Countershaft) Speed Sensor Circuit (No Signal Input)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. Record all freeze data, and clear the DTC with the HDS.
2. Raise the front of the vehicle, or lift the vehicle up, make sure it is securely supported, and allow the front wheels to rotate freely.
3. Start the engine, and run it in the D position at engine speeds over 2,000 rpm for more than 10 seconds. Slow down and stop the wheels.
4. Monitor the OBD status for P0722 in the DTCs/Freeze Data in A/7 Mode Menu for a pass/fail.
Does the result indicate FAILED?
YES - Go to step 5.
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 tester indicates NOT COMPLETED, return to step 3 and recheck.
5. Turn the ignition switch OFF.
6. Jump the SCS line with the HDS.
7. Disconnect PCM connectors A (31 P) and D (17P), and the output shaft (countershaft) speed sensor connector.
8. Check for continuity, between PCM connector terminals A3 and body ground, and between D1 6 and body ground.
Is there continuity?
YES - Go to step 9.
NO - Repair an open in the wires between PCM connector terminals A3, DIG, and ground (G101, G102), or repair a poor ground (G101, G102), then go to step 31.
9. Connect PCM connectors A (31P) and D (17P).
10. Turn the ignition switch ON (II).
11. Measure the voltage between output shaft (countershaft) speed sensor connector terminal No. 1 and body ground.
Is there about 5 V?
YES - Go to step 12.
NO - Go to step 25.
12. Turn the ignition switch OFF.
13. Disconnect PCM connector B (24P).
14. Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.
Is there continuity?
YES - Repair a short to ground in the wire between PCM connector terminal B19 and the output shaft (countershaft) speed sensor connector, then go to step 31.
NO - Go to step 15.
15. Disconnect PCM connector A (31 P).
16. Check for continuity between PCM connector terminal A23 and output shaft (countershaft) speed sensor connector terminal No. 3.
Is there continuity?
YES - Go to step 17.
NO - Repair an open in the wire between the output shaft (countershaft) speed sensor connector and PCM connector terminal A23, then go to step 31.
17. Connect PCM connectors A (31 P) and B (24P).
18. Turn the ignition switch ON (II).
19. Measure the voltage between output shaft (countershaft) speed sensor connector terminals No. 2 and No. 3.
Is there about 5 V?
YES - Go to step 20.
NO - Go to step 30.
20. Connect the output shaft (countershaft) speed sensor connector.
21. Measure the voltage between PCM connector terminals B19 and A3 or D16.
Is the voltage 0 V or about 5 V?
YES - Go to step 22.
NO - Replace the output shaft (countershaft) speed sensor, then go to step 31.
22. Raise the front of the vehicle, or lift the vehicle up, make sure it is securely supported, and allow the front wheels to rotate freely.
23. Start the engine, and run it at 2,000 rpm in the D position.
24. Measure the voltage between PCM connector terminals B19 and A3 or D16 while holding the engine speed at 2,000 rpm.
Is there 1.5 - 3.5 V?
YES - 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.
NO - Replace the output shaft (countershaft) speed sensor, then go to step 31.
25. Measure the voltage between PCM connector terminals A12 and A3 or D16.
Is there about 5 V?
YES - Repair an open in the wire between PCM connector terminal A12 and the output shaft (countershaft) speed sensor, then go to step 31.
NO - Go to step 26.
26. Turn the ignition switch OFF.
27. Jump the SCS line with the HDS.
28. Disconnect PCM connector C (22P).
29. Check for continuity between PCM connector terminal A12 and body ground.
Is there continuity?
YES - Repair a short in the wire between PCM connector terminal Al 2 and the output shaft (countershaft) speed sensor, then go to step 31.
NO - Check for loose or poor connections at PCM connector terminal A12. If the connection 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.
30. Measure the voltage between PCM connector terminals B19 and A3 or D16.
Is there about 5 V?
YES - Repair an open in the wire between PCM connector terminal B19 and the output shaft (countershaft) speed sensor, then go to step 31.
NO - Check for loose or poor connections at PCM connector terminal B19. If the connection 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.
31. Clear the DTC with the HDS.
32. Start the engine, and run it in the D position at engine speeds over 2,000 rpm for more than 10 seconds. Slow down and stop the wheels.
33. 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 - Return to step 5 and recheck.