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EC-332 < COMPONENT DIAGNOSIS > [VK56DE] P1564 ASCD STEERING SWITCH P1564 ASCD STEERING SWITCH Component Description INFOID:0000000005149391 ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of switch, and determines which button is operated. for the ASCD function. On Board Diagnosis Logic INFOID:0000000005149392 • 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-286, "On Board Diagnosis Logic" . DTC Confirmation Procedure INFOID:0000000005149393 1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step. a. Turn ignition switch OFF and wait at least 10 seconds. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. onds. 7. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds. . Diagnosis Procedure INFOID:0000000005149394 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. PBIB2640E DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause P1564 ASCD steering switch • An excessively high voltage signal from the ASCD steering switch is sent to ECM. • ECM detects that input signal from the ASCD steer- ing switch is out of the specified range. • ECM detects that the ASCD steering switch is stuck ON. • Harness or connectors (The switch circuit is open or • ASCD steering switch |