P0720

P0720 OUTPUT SPEED SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


CAUTION:
Always drive vehicle at a safe speed.

1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Start the engine.
2.Drive the vehicle.
3.Maintain the following conditions for 5 seconds or more.





With GST
Follow the procedure "With CONSULT".
Is "P0720" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Electrical Diagrams.

1. CHECK SECONDARY SPEED SENSOR POWER CIRCUIT (PART 1)

1.Turn ignition switch OFF.
2.Disconnect secondary speed sensor connector.
3.Turn ignition switch ON.
4.Check voltage between secondary speed sensor harness connector terminals.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK TCM INPUT SIGNAL

1.Turn ignition switch OFF.
2.Connect secondary speed sensor connector.
3.Lift the vehicle.
4.Start the vehicle.
5.Check frequency of secondary speed sensor.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- GO TO 3.

3. CHECK CIRCUIT BETWEEN TCM AND SECONDARY SPEED SENSOR

1.Turn ignition switch OFF.
2.Disconnect TCM connector.
3.Disconnect secondary speed sensor connector.
4.Check continuity between TCM harness connector terminals and secondary speed sensor harness connector terminals.





5.Check continuity between TCM harness connector terminals and ground.





Is the inspection result normal?
YES- Replace secondary speed sensor. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace damaged parts.

4. CHECK SECONDARY SPEED SENSOR POWER CIRCUIT (PART 2)

Check voltage between secondary speed sensor harness connector terminal and ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 5.

5. CHECK CIRCUIT BETWEEN SECONDARY SPEED SENSOR AND IPDM E/R

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R connector.
3.Check continuity between IPDM E/R harness connector terminals and secondary speed sensor harness connector terminal.





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





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace damaged parts.

6. DETECT MALFUNCTIONING ITEMS

Check the following items:
- Harness for short or open between ignition switch and IPDM E/R.
- 10A fuse (# 46, located in IPDM E/R)
- IPDM E/R
- Ignition switch
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace damaged parts.

7. CHECK SECONDARY SPEED SENSOR GROUND CIRCUIT

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





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace damaged parts.
Revision: March 20122013 Infiniti JX