P1564

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 procedure 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.
2.Wait at least 10 seconds.
3.Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
4.Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
5.Press ACCEL/RES switch for at least 10 seconds, then release it and wait at least 10 seconds.
6.Press COAST/SET switch for at least 10 seconds, then release it and wait at least 10 seconds.
7.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 "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode of "ENGINE"
using CONSULT.
3.Check each item indication as per the following conditions.










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





*1: Except for California
*2: For California
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 (spiral cable) harness connector.
4.Check the continuity between combination switch (spiral cable) and ECM harness connector.





*1: Except for California
*2: For California
5.Also check harness for short to ground and 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 ECM harness connector and combination switch.





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

4. CHECK ASCD STEERING SWITCH

Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace ASCD steering switch. Refer to "Exploded View" Exploded View.


Component Inspection


1. CHECK ASCD STEERING SWITCH

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





Is the inspection result normal?
YES- INSPECTION END
NO- Replace ASCD steering switch. Refer to "Exploded View" Exploded View.