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P0300, P0301, P0302, P0303, P0304 MISFIRE EC-337 < DTC/CIRCUIT DIAGNOSIS > [MR FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O 4. PERFORM POWER BALANCE TEST With CONSULT 1. Start engine. 2. Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” using CONSULT. 3. Make sure that each circuit produces a momentary engine speed drop. YES >> GO TO 10. NO >> GO TO 5. 5. CHECK FUNCTION OF FUEL INJECTOR 1. Start engine and let engine idle. 2. Listen to each fuel injector operating sound. Is the inspection result normal? YES >> GO TO 6. NO >> Perform trouble diagnosis for FUEL INJECTOR. Refer to . 6. CHECK FUNCTION OF IGNITION COIL-I CAUTION: Do the following procedure in the place where ventilation is good without the combustible. 1. Turn ignition switch OFF. 2. Remove fuel pump fuse in IPDM E/R to release fuel pressure. NOTE: Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce- dure. 3. Start engine. 4. After engine stalls, crank it two or three times to release all fuel pressure. 5. Turn ignition switch OFF. 6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils. 7. Remove ignition coil and spark plug of the cylinder to be checked. 8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder. 9. Connect spark plug and harness connector to ignition coil. 10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as shown in the figure. 11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal por- tion. CAUTION: • Do not approach to the spark plug and the ignition coil within 50 cm (19.7 in). Be careful not to get an electrical shock while checking, because the electrical discharge voltage becomes 20 kV or more. • It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken. NOTE: When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal- functioning. Is the inspection result normal? YES >> GO TO 10. NO >> GO TO 7. Clicking noise should be heard. PBIB3332E Spark should be generated. JMBIA0066GB |