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DTC P0504 ASCD BRAKE SWITCH EC-229 [YD (WITH EURO-OBD)] C D E F G H I J K L M A EC 4. DETECT MALFUNCTIONING PART Check the following. ● Fuse block (J/B) connector M2 ● 15A fuse ● Harness for open or short between stop lamp switch and fuse >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal 100 and stop lamp switch terminal 2. 3. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 7. NG >> GO TO 6. 6. DETECT MALFUNCTIONING PART Check the following. ● Harness connectors M77, F109 ● Harness for open or short between ECM and stop lamp switch >> Repair open circuit or short to ground or short to power in harness or connectors. 7. CHECK STOP LAMP SWITCH Refer to EC-231, "Component Inspection" . OK or NG OK >> GO TO 16. NG >> Replace stop lamp switch. 8. CHECK ASCD BRAKE SWITCH CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ASCD clutch switch harness connector. 3. Turn ignition switch ON. 4. Check voltage between ASCD clutch switch terminal 2 and OK or NG OK >> GO TO 13. NG >> GO TO 9. Continuity should exist. CONDITION VOLTAGE When brake pedal is released Battery voltage When brake pedal is depressed Approx. 0V MBIB0237E |