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HIGH PRESSURE FUEL PUMP EC-1213 < DTC/CIRCUIT DIAGNOSIS > [MR EXCEPT FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O YES >> GO TO 8. NO >> GO TO 2. 2. CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Disconnect fuel injector relay harness connector. 4. Check the continuity between ECM harness connector and high pressure fuel pump relay harness con- nector. 5. Also check harness for short to ground. YES >> GO TO 3. NO >> Repair or replace error-detected parts 3. CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (CONTACT SIDE) Check the voltage between high pressure fuel pump relay harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> Perform the trouble diagnosis for power supply circuit. 4. CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (EXCITATION COIL SIDE) 1. Reconnect all harness connectors disconnected. 2. Turn ignition switch ON. 3. Check the voltage between high pressure fuel pump relay harness connector and ground. Is the inspection result normal? YES >> GO TO 6. NO >> GO TO 5 5. CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY CIRCUIT (EXCITATION COIL SIDE) 1. Turn ignition switch OFF. 2. Disconnect high pressure fuel pump relay harness connector. 3. Disconnect IPDM E/R harness connector. 4. check the continuity between IPDM E/R harness connector and high pressure fuel pump harness connec- tor. + − Continuity ECM High pressure fuel pump re- lay Connector Terminal Connector Terminal F24 47 E58 3 Existed + − Voltage High pressure fuel pump relay Connector Terminal E58 5 Ground Battery voltage + − Voltage High pressure fuel pump relay Connector Terminal E58 2 Ground Battery voltage |