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EC-362 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P1564 ASCD STEERING SWITCH P1564 ASCD STEERING SWITCH DTC Logic INFOID:0000000009651210 DTC DETECTION LOGIC NOTE: DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- 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 sec- 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 . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009651211 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 3. Check each item indication under the following conditions. 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 steering switch is out of the specified • ECM detects that the ASCD steering switch is stuck ON. • Harness or connectors (The switch circuit is open or shorted.) • ASCD steering switch Monitor item Condition Indication MAIN SW MAIN switch Pressed ON Released OFF CANCEL SW CANCEL switch Pressed ON Released OFF |