Nissan Versa

 Sedan Service Manual

Transmission & driveline » Transaxle & transmission (TM) » P0720 Output speed sensor
Diagnosis Procedure

1.CHECK OUTPUT SPEED SENSOR POWER CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect output speed sensor connector.
3. Turn ignition switch ON.
4. Check voltage between output speed sensor harness connector terminal and ground.

Is the inspection result normal?

YES >> GO TO 2.

NO >> GO TO 6.

2.CHECK OUTPUT SPEED SENSOR GROUND CIRCUIT

Check continuity between output speed sensor harness connector terminal and ground. 

Is the inspection result normal?

YES >> GO TO 3.

NO >> Repair or replace malfunctioning parts.

3.CHECK CIRCUIT BETWEEN OUTPUT SPEED SENSOR AND TCM (PART 1)

1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between output speed sensor harness connector terminal and TCM harness connector terminal.                                                                              

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace malfunctioning parts.

4.CHECK CIRCUIT BETWEEN OUTPUT SPEED SENSOR AND TCM (PART 2)

Check continuity between output speed sensor harness connector terminal and ground.    

Is the inspection result normal?\

YES >> GO TO 5.

NO >> Repair or replace malfunctioning parts.

5.CHECK TCM INPUT SIGNALS

1. Connect all of disconnected connectors.
2. Lift the vehicle.
3. Start the engine.
4. Check frequency of output speed sensor.       

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI "Intermittent Incident".

NO >> Replace output speed sensor. Refer to TM "Removal and Installation".

6.CHECK CIRCUIT BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (PART 1)

1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector terminal and output speed sensor harness connector terminal.                                                                            

Is the check result normal?

YES >> GO TO 7.

NO >> Repair or replace malfunctioning parts.

7.CHECK CIRCUIT BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (PART 2)

Check continuity between IPDM E/R harness connector terminal and ground.           

Is the check result normal?

YES >> GO TO 8.

NO >> Repair or replace malfunctioning parts.

8.DETECT MALFUNCTIONING ITEMS

Check the following items:

• Harness open circuit or short circuit between ignition switch and IPDM E/R. Refer to PG "Wiring Diagram - Ignition Power Supply -".
• 10A fuse (No.49, IPDM E/R). Refer to PG "IPDM E/R Terminal Arrangement".
• IPDM E/R

Is the check result normal?

YES >> Check intermittent incident. Refer to GI "Intermittent Incident".

NO >> Repair or replace malfunctioning parts.

DTC Logic

Diagnosis Procedure