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EC-402 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] P1572 BRAKE PEDAL POSITION SWITCH OK or NG OK >> GO TO 2. NG >> GO TO 3. 2. CHECK OVERALL FUNCTION-II With CONSULT Check “BRAKE SW2” indication in “DATA MONITOR” mode. Without CONSULT Check voltage between ECM terminal 122 and ground under the following conditions. OK or NG OK >> GO TO 14. NG >> GO TO 10. 3. CHECK CLUTCH PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect clutch pedal position switch harness connector. 3. Turn ignition switch ON. 4. Check voltage between clutch pedal position switch terminal 1 and ground under the following conditions with CONSULT or tester. OK or NG OK >> GO TO 8. NG >> GO TO 4. 4. CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect brake pedal position switch harness connector. 3. Turn ignition switch ON. 4. Check voltage between brake pedal position switch terminal 1 and ground with CONSULT or tester. OK or NG OK >> GO TO 6. NG >> GO TO 5. 5. DETECT MALFUNCTIONING PART Check the following. CONDITION VOLTAGE Clutch pedal and/or brake pedal: Slightly depressed Approximately 0V Clutch pedal and brake pedal: Fully released Battery voltage CONDITION INDICATION Brake pedal: Fully released OFF Brake pedal: Slightly depressed ON CONDITION VOLTAGE Brake pedal: Fully released Approximately 0V Brake pedal: Slightly depressed Battery voltage CONDITION VOLTAGE Brake pedal: Slightly depressed Approximately 0V Brake pedal: Fully released Battery voltage Voltage: Battery voltage |