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EC-278 < COMPONENT DIAGNOSIS > [HR16DE (WITH EURO-OBD)] P1574 ASCD VEHICLE SPEED SENSOR P1574 ASCD VEHICLE SPEED SENSOR Description INFOID:0000000001671052 The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina- for ASCD functions. DTC Logic INFOID:0000000001671053 DTC DETECTION LOGIC NOTE: U1001. Refer to . • If DTC P1574 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer • If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer • If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine. 2. Drive the vehicle at more than 40 km/h (25 MPH). CAUTION: Always drive vehicle at a safe speed. 3. Check DTC. Is DTC detected? YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000001671054 1. CHECK DTC WITH TCM Check DTC with TCM. Refer to TM-32, "OBD Diagnostic Trouble Code (DTC)" Is the inspection result normal? YES >> GO TO 2. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1574 ASCD vehicle speed ECM detects a difference between two vehicle • Harness or connectors (The CAN communication line is open or • Combination meter |