DTC Troubleshooting: P0723 (9-6)

DTC P0723: Output Shaft (Countershaft) 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. Record all freeze data, and clear the DTC with the HDS.

1. Test-drive the vehicle for 10 minutes under the same conditions as those indicated by the freeze data, and monitor the OBD status for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate a fail?

YES | - | Go to Step 3 .
NO | - | Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and PCM. If the tester indicates NOT COMPLETE, return to Step 2 and recheck.■

1. Turn the ignition switch OFF.

1. 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 5 .
NO | - | Repair the connector terminals, then go to Step 5 .

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

1. Test-drive the vehicle for several minutes, and monitor the OBD status for P0723 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate a fail?

YES | - | Go to Step 7 .
NO | - | The problem has been corrected. If the tester indicates NOT COMPLETE, return to Step 6 and recheck.■

1. Turn the ignition switch OFF.

1. Jump the SCS line with the HDS.

1. Disconnect PCM connector A (31P).

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

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

Is there continuity?

YES | - | Repair short to ground in the wire between PCM connector terminal A18 and the output shaft (countershaft) speed sensor, then go to Step 18 .
NO | - | Go to Step 12 .

1. Connect PCM connector A (31P).

1. Turn the ignition switch ON (II).

1. 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, then go to Step 18 .
NO | - | Go to Step 15 .

1. Turn the ignition switch OFF.

1. Disconnect PCM connector A (31P).

1. Check for continuity between PCM connector terminal A18 and output shaft (countershaft) speed sensor connector terminal No. 2.

Is there continuity?

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 | - | Repair open in the wire between PCM connector terminal A18 and the output shaft (countershaft) speed sensor, then go to Step 18 .

1. Clear the DTC with the HDS.

1. Test-drive the vehicle for several minutes in the D position in all five gears.

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

Does the result indicate a pass?

YES | - | The problem has been corrected.■
NO | - | Return to Step 1 and recheck.■