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EC-380 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P1574 ASCD VEHICLE SPEED SENSOR P1574 ASCD VEHICLE SPEED SENSOR Description INFOID:0000000005536788 The ECM receives two vehicle speed signals via CAN communication line. One is sent from combination for ASCD functions. DTC Logic INFOID:0000000005536789 DTC DETECTION LOGIC NOTE: • If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer • If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer 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. Start engine (VDC switch OFF). 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:0000000005536790 1. CHECK DTC WITH TCM Check DTC with TCM. Refer to TM-34, "Diagnosis Description" . Is the inspection result normal? DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1574 ASCD vehicle speed The difference the between two vehicle speed • Harness or connectors (The CAN communication line is open or • Combination meter |