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EC-438 < DTC/CIRCUIT DIAGNOSIS > [VK56VD] P1572 ASCD BRAKE SWITCH P1572 ASCD BRAKE SWITCH DTC Logic INFOID:0000000006217943 DTC DETECTION LOGIC NOTE: • This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed. DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING 1. 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. NOTE: >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A 1. Start engine (VDC switch OFF). 2. Press MAIN switch and check that CRUISE indicator is displayed in combination meter. 3. Drive the vehicle for at least 5 consecutive seconds under the following conditions. CAUTION: Always drive vehicle at a safe speed. 4. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Go to NO >> GO TO 3. 3. PERFORM DTC CONFIRMATION PROCEDURE 1. Drive the vehicle for at least 5 consecutive seconds under the following conditions. CAUTION: DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause P1572 ASCD BRAKE SW A) When the vehicle speed is above 30 km/h • Harness or connectors (The stop lamp switch circuit is shorted.) • Harness or connectors (The ASCD brake switch circuit is short- • Stop lamp switch B) ASCD brake switch signal is not sent to Vehicle speed More than 30 km/h (19 mph) Selector lever Suitable position |