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ASCD BRAKE SWITCH EC-453 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O OK or NG OK >> INSPECTION END NG >> GO TO 7. 3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ASCD brake switch harness connector. 3. Turn ignition switch ON. 4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT or tester. OK or NG OK >> GO TO 5. NG >> GO TO 4. 4. DETECT MALFUNCTIONING PART Check the following. • Harness connectors M31, E152 • Fuse block (J/B) connector M4 • 10A fuse • Harness for open or short between ASCD brake switch and fuse >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2. Refer to Wiring Diagram. 4. Also check harness for short to ground and short to power. OK >> GO TO 6. NG >> Repair open circuit or short to ground or short to power in harness or connectors. CONDITION VOLTAGE Brake pedal: Fully released Approximately 0V Brake pedal: Slightly depressed Battery voltage PBIB1537E BBIA0373E Voltage: Battery voltage PBIB0857E Continuity should exist. |