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P1572 BRAKE PEDAL POSITION SWITCH EC-477 < DTC/CIRCUIT DIAGNOSIS > [MR FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-45, "Intermittent Incident" . NO >> GO TO 6. 3. CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY 1. Turn ignition switch OFF. 2. Disconnect brake pedal position switch harness connector. 3. Turn ignition switch ON. 4. Check the voltage between brake pedal position switch harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> Perform the trouble diagnosis for power supply circuit. 4. CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between brake pedal position switch harness connector and ECM harness connec- tor. 4. Also check harness for short to ground and to power. YES >> GO TO 5. NO >> Repair or replace error-detected parts. 5. CHECK BRAKE PEDAL POSITION SWITCH Check the brake pedal position switch. Refer to EC-571, "Component Inspection (Brake Pedal Position Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-45, "Intermittent Incident" . NO >> Replace brake pedal position switch. Refer to 6. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect stop lamp switch harness connector. 3. Check the voltage between stop lamp switch harness connector and ground. ECM Condition Voltage (Approx.) Connector + – Terminal E18 115 127 Brake pedal Slightly depressed Battery voltage Fully released 0 V + − Voltage Brake pedal position switch Connector Terminal E112 1 Ground Battery voltage + − Continuity Brake pedal position switch ECM Connector Terminal Connector Terminal E112 2 E18 116 Existed |