P1564

DTC P1564 ASCD STEERING SWITCH




Component Description
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of switch, and determines which button is operated.
Refer to "AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.




CONSULT-III Reference Value in Data Monitor Mode




On Board Diagnosis Logic
- This self-diagnosis has the one trip detection logic.
- The MIL will not light up for this self-diagnosis.

NOTE: If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-406, "DTC P0605 ECM". P0605

DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

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 RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
7. Check DTC.
8. If DTC is detected, go to "Diagnostic Procedure" below.

EC-ASC/SW-01:

Wiring Diagram

Step 1:

Step 2-3:

Step 4-8:

Diagnostic Procedure

Component Inspection

ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M78.




2. Check continuity between combination switch (spiral cable) terminals 16 and 20 with pushing each switch.
If NG, replace ASCD steering switch.