Engine Controls

P1564 ASCD STEERING SWITCH

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
"DTC Logic" P0605.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON and wait at least 10 seconds.
2.Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3.Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
4.Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
5.Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
6.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT
1.Turn ignition switch ON.
2.Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with
CONSULT.
3.Check each item indication under the following conditions.





Revision: March 20122013 Infiniti JX

Without CONSULT
1.Turn ignition switch ON.
2.Check the voltage between ECM harness connector terminals under the following conditions.





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

2. CHECK ASCD STEERING SWITCH GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Disconnect combination switch harness connector M149.
4.Check the continuity between combination switch and ECM harness connector.





5.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace error-detected parts.

3. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

1.Check the continuity between combination switch and ECM harness connector.





2.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK ASCD STEERING SWITCH

Check ASCD steering switch. Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
Revision: March 20122013 Infiniti JX
NO- Replace ASCD steering switch. Refer to "ENGINE CONTROL SYSTEM : Component Parts Location" Engine Control System.


Component Inspection


1. CHECK ASCD STEERING SWITCH

1.Turn ignition switch OFF.
2.Disconnect combination switch (spiral cable) harness connector.
3.Check resistance between combination switch harness connector terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace ASCD steering switch. Refer to "Exploded View" Exploded View.
Revision: March 20122013 Infiniti JX