DTC P0722: Problem in Output Shaft (Countershaft) Speed Sensor Circuit (No Signal Input); DTC P0723: Output Shaft (Countershaft) Speed Sensor Intermittent Failure
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- Clear the DTC with the HDS.
- With SH-AWD: Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.
Without SH-AWD: Block the rear wheels, and 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 lift.
- Start the engine, disable the VSA by pressing the VSA OFF button, move the shift lever to D, and run the vehicle with the engine speed above 2, 000 RPM. Compare the Input Shaft (Mainshaft) Speed and the Output Shaft (Countershaft) Speed with the HDS in the A/T Data List. Slow down, and stop the wheels.
Are the speeds about the same?
YES - Intermittent failure, the system is OK at this time.
NO - Go to step 5.
- Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- Disconnect the output shaft (countershaft) speed sensor connector.
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- Measure the voltage between output shaft (countershaft) speed sensor connector terminal No. 1 and body ground.
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Is there about 5 V?
YES - Go to step 9.
NO - Repair an open in the wire between PCM connector terminal B36 and the output shaft (countershaft) speed sensor, then go to step 15.
- Measure the voltage between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there about 5 V?
YES - Go to step 10.
NO - Go to step 11.
- Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 3 and body ground.Fig 3: Checking Continuity Between Output Shaft Speed Sensor Connector Terminal No. 3 And Body Ground
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Is there continuity?
YES - Replace the output shaft (countershaft) speed sensor (see OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR REPLACEMENT ), then go to step 15.
NO - Repair an open in the wire between the output shaft (countershaft) speed sensor and PCM connector terminal C15, then go to step 15.
- Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- Jump the SCS line with the HDS.
- Disconnect PCM connector B (49P).
- Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 2 and body ground.Fig 4: Checking Continuity Between Output Shaft Speed Sensor Connector Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair a short to body ground in the wire between PCM connector terminal B38 and the output shaft (countershaft) speed sensor, then go to step 15.
NO - Repair an open in the wire between PCM connector terminal B38 and the output shaft (countershaft) speed sensor, then go to step 15.
- Reconnect all connectors.
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- Clear the DTC with the HDS.
- Start the engine, disable the VSA by pressing the VSA OFF button, move the shift lever to D, and run the vehicle with the engine speed above 2, 000 RPM. Compare the Input Shaft (Mainshaft) Speed and the Output Shaft (Countershaft) Speed with the HDS in the A/T Data List. Slow down, and stop the wheels.
Are the speeds about the same?
YES - Troubleshooting is complete.
NO - Replace the PCM (see ECM/PCM REPLACEMENT ).