C1601

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


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. DTC REPRODUCTION PROCEDURE

With CONSULT
1.Turn the ignition switch OFF to ON.
2.Perform "EPS" self-diagnosis.
Is DTC "C1601" detected?
YES- Proceed to diagnosis procedure. Refer to "Diagnosis Procedure" .
NO- Inspection End.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Electrical Diagrams.

1. CHECK POWER STEERING CONTROL MODULE GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect power steering control module harness connector.
3.Check continuity between power steering control module harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair open circuit or short to ground or short to power in harness or connectors, and repair or replace the malfunctioning component.

2. CHECK POWER STEERING CONTROL MODULE POWER SUPPLY CIRCUIT (1)

1.Check voltage between power steering control module harness connector terminals and ground.





Revision: March 20122013 Infiniti JX
2.Turn ignition switch ON.

CAUTION:
Never start the engine.
3.Check voltage between power steering control module harness connector terminals and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK POWER STEERING CONTROL MODULE POWER SUPPLY CIRCUIT (2)

1.Turn ignition switch OFF.
2.Check the 100A fusible link (#D).
3.Disconnect battery terminal with fusible link harness connector.
4.Check continuity between power steering control module harness connector terminal and battery terminal with fusible link harness connector terminal.





5.Check continuity between power steering control module harness connector terminal and ground.





Is the inspection result normal?
YES- Perform the trouble diagnosis for battery power supply circuit. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
NO- Repair or replace the malfunctioning component.

4. CHECK POWER STEERING CONTROL MODULE POWER SUPPLY CIRCUIT (3)

1.Check voltage between power steering control module harness connector terminals and ground.





2.Turn ignition switch ON.

CAUTION:
Never start the engine.
3.Check voltage between power steering control module harness connector terminals and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 5.

5. CHECK POWER STEERING CONTROL MODULE POWER SUPPLY CIRCUIT (4)

1.Turn ignition switch OFF.
Revision: March 20122013 Infiniti JX
2.Check the 10A fuse No. 49 in the IPDM E/R.
3.Disconnect IPDM E/R harness connector E119.
4.Check continuity between power steering control module harness connector terminal and IPDM E/R harness connector terminal.





5.Check continuity between power steering control module harness connector terminal and ground.





Is the inspection result normal?
YES- Perform the trouble diagnosis for ignition power supply circuit. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
NO- Repair or replace the malfunctioning component.

6. CHECK TERMINALS AND HARNESS CONNECTORS

Check the power steering control module pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- Power steering control module is malfunctioning. Replace steering oil pump assembly. Refer to
"Removal and Installation" Removal and Installation.
NO- Repair or replace the malfunctioning component.
Revision: March 20122013 Infiniti JX