ASCD Steering Switch
DTC P1564 ASCD STEERING SWITCHComponent 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 EC-37 for the ASCD function. Automatic Speed Control Device (ASCD)
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
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 and wait at lest 10 seconds.
2. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
4. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
5. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Check DTC.
7. If DTC is detected, go to "Diagnosis Procedure".
Wiring Diagram
EC-ASC/SW-01:
Diagnosis Procedure
Step 1-2:
Step 2 (Continued)-6:
Step 6 (Continued)-8:
Component Inspection
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M203.
2. Check continuity between combination switch (spiral cable) terminals 14 and 15 with pushing each switch.
If NG, replace ASCD steering switch.