P1777

P1777 STEP MOTOR

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 "P1777" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure

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

1. CHECK STEP MOTOR CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect TCM connector.
3.Check resistance between TCM harness connector terminals.





4.Check resistance between TCM harness connector terminals and ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- GO TO 2.

2. CHECK STEP MOTOR

1.Disconnect CVT unit connector.
2.Check step motor. Refer to "Component Inspection (Step Motor)" .
Is the inspection result normal?
YES- GO TO 3.
NO- Replace transaxle assembly due to malfunction in step motor. Refer to "Removal and Installation" Removal and Installation.

3. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

1.Check continuity between TCM harness connector terminals and CVT unit harness connector terminals.





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





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace damaged parts.


Component Inspection (Step Motor)


1. CHECK STEP MOTOR

1.Check resistance between CVT unit connector terminals.





2.Check the resistance between CVT unit connector terminals and ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- INSPECTION END
NO- Replace transaxle assembly due to malfunction in step motor. Refer to "Removal and Installation" Removal and Installation.
Revision: March 20122013 Infiniti JX