Symptom Table
SYSTEM - BASIC ENGINE CONTROL SYSTEM
| SYMPTOM | Reference | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HARD/NO START/RESTART (EXCP. HA) | ENGINE STALL | HESITATION/SURGING/FLAT SPOT | SPARK KNOCK/DETONATION | LACK OF POWER/POOR ACCELERATION | HIGH IDLE/LOW IDLE | ROUGH IDLE/HUNTING | IDLING VIBRATION | SLOW/NO RETURN TO IDLE | OVERHEATS/WATER TEMPERATURE HIGH | EXCESSIVE FUEL CONSUMPTION | EXCESSIVE OIL CONSUMPTION | BATTERY DEAD (UNDER CHARGE) | |||
| Warranty symptom code | AA | AB | AC | AD | AE | AF | AG | AH | AJ | AK | AL | AM | HA | ||
| Fuel | Low pressure fuel pump circuit | 1 | 1 | 2 | 3 | 2 | 2 | 2 | 3 | 2 | Refer to Component Function Check . | ||||
| Fuel pressure regulator system | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | Refer to Work Procedure . | ||||
| Fuel injector circuit | 1 | 1 | 2 | 3 | 2 | 2 | 2 | 2 | Refer to Component Function Check . | ||||||
| Evaporative emission system | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | Refer to EVAP CANISTER : Periodic Maintenance . | ||||
| FRP sensor circuit | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | Refer to DTC Description . | ||||||
| High pressure fuel pump circuit | 4 | 3 | Refer to Component Function Check . | ||||||||||||
| Air | Positive crankcase ventilation system | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | Refer to POSITIVE CRANKCASE VENTILATION : Periodic Maintenance . | ||
| Incorrect idle speed adjustment | 1 | 1 | 1 | 1 | 1 | Refer to Work Procedure . Refer to Work Procedure . | |||||||||
| Electric throttle control actuator | 1 | 1 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | Refer to DTC Description . Refer to DTC Description . | |||
| Ignition | Incorrect ignition timing adjustment | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | Refer to Work Procedure . | |||||
| Ignition circuit | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | Refer to Component Function Check . | ||||||
| Main power supply and ground circuit | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | Refer to Diagnosis Procedure . | |||||
| Mass air flow sensor circuit | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | Refer to DTC Description . | ||||||
| Engine coolant temperature sensor 1 circuit | 3 | 3 | 3 | Refer to DTC Description . | |||||||||||
| Air fuel ratio (A/F) sensor 1 circuit | Refer to DTC Description . Refer to DTC Description . | ||||||||||||||
| Throttle position sensor circuit | 2 | 2 | Refer to DTC Description . | ||||||||||||
| Accelerator pedal position sensor circuit | 3 | 2 | 1 | Refer to DTC Description . | |||||||||||
| Knock sensor circuit | 2 | 3 | Refer to DTC Description . Refer to DTC Description . | ||||||||||||
| Engine oil temperature sensor | 4 | 2 | 3 | Refer to DTC Description . | |||||||||||
| Engine oil pressure sensor | 4 | 4 | 3 | 3 | 3 | 3 | Refer to DTC Description . | ||||||||
| Crankshaft position sensor circuit | 2 | 2 | Refer to DTC Description . | ||||||||||||
| Camshaft position sensor circuit | 3 | 2 | Refer to DTC Description . Refer to DTC Description . | ||||||||||||
| Vehicle speed signal circuit | 2 | 3 | 3 | 3 | Refer to DTC Description . | ||||||||||
| Power steering pressure sensor circuit | 2 | 3 | 3 | Refer to DTC Description . | |||||||||||
| ECM | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | - | |||
| Intake valve timing control solenoid valve circuit | 3 | 2 | 1 | 3 | 2 | 2 | 3 | 3 | Refer to DTC Description . Refer to DTC Description . | ||||||
| Exhaust valve timing control solenoid valve circuit | 3 | 2 | 1 | 3 | 2 | 2 | 3 | 3 | Refer to DTC Description . Refer to DTC Description . | ||||||
| Exhaust valve timing control position sensor | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | Refer to DTC Description . Refer to DTC Description . | ||||||
| Exhaust gas temperature sensor | 5 | Refer to DTC Description . | |||||||||||||
| VVEL control module | 3 | 4 | 4 | 3 | Refer to Component Description . | ||||||||||
| VVEL actuator motor | 3 | 4 | 4 | 3 | Refer to DTC Description . Refer to DTC Description . | ||||||||||
| VVEL actuator motor relay | 3 | 4 | 4 | 3 | Refer to DTC Description . | ||||||||||
| VVEL control shaft position sensor | 3 | 4 | 4 | 3 | Refer to DTC Description . Refer to DTC Description . | ||||||||||
| PNP signal circuit | 3 | 3 | 3 | 3 | 3 | Refer to DTC Description . | |||||||||
| Refrigerant pressure sensor circuit | 2 | 3 | 3 | 4 | Refer to Component Function Check . | ||||||||||
| Electrical load signal circuit | 3 | Refer to Component Function Check . | |||||||||||||
| Air conditioner circuit | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | Refer to Work Flow . | |||
| ABS actuator and electric unit (control unit) | 4 | Refer to Work Flow . | |||||||||||||
| Battery current sensor | 4 | 5 | 5 | 3 | Refer to DTC Description . | ||||||||||
| Heated oxygen sensor 2 | 6 | 6 | 6 | 6 | 5 | Refer to DTC Description . Refer to DTC Description . | |||||||||
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM - ENGINE MECHANICAL and OTHER
| SYMPTOM | Reference page | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HARD/NO START/RESTART (EXCP. HA) | ENGINE STALL | HESITATION/SURGING/FLAT SPOT | SPARK KNOCK/DETONATION | LACK OF POWER/POOR ACCELERATION | HIGH IDLE/LOW IDLE | ROUGH IDLE/HUNTING | IDLING VIBRATION | SLOW/NO RETURN TO IDLE | OVERHEATS/WATER TEMPERATURE HIGH | EXCESSIVE FUEL CONSUMPTION | EXCESSIVE OIL CONSUMPTION | BATTERY DEAD (UNDER CHARGE) | |||
| Warranty symptom code | AA | AB | AC | AD | AE | AF | AG | AH | AJ | AK | AL | AM | HA | ||
| Fuel | Fuel tank | 5 | 5 | Refer to FUEL SYSTEM : Inspection . | |||||||||||
| Fuel piping | 5 | 5 | 5 | 5 | 5 | 5 | Refer to FUEL SYSTEM : Inspection . Refer to FUEL SYSTEM : Inspection . | ||||||||
| Vapor lock | - | ||||||||||||||
| Valve deposit | 5 | 5 | 5 | 5 | 5 | 5 | 5 | - | |||||||
| Poor fuel (Heavy weight gasoline, Low octane) | - | ||||||||||||||
| Air | Air duct | 5 | 5 | 5 | 5 | 5 | 5 | Refer to AIR CLEANER AND AIR DUCT : Inspection . | |||||||
| Air cleaner | Refer to AIR CLEANER AND AIR DUCT : Exploded View . | ||||||||||||||
| Air leakage from air duct (Mass air flow sensor - electric throttle control actuator) |
5 | 5 | 5 | 5 | Refer to AIR CLEANER AND AIR DUCT : Inspection . | ||||||||||
| Electric throttle control actuator | Refer to DTC Description . | ||||||||||||||
| Air leakage from intake manifold/Collector/Gasket | Refer to INTAKE MANIFOLD : Exploded View . | ||||||||||||||
| Cranking | Battery | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Refer to Work Flow . | |||||
| Generator circuit | Refer to Work Flow . | ||||||||||||||
| Starter circuit | 3 | Refer to Work Flow . | |||||||||||||
| Signal plate | 6 | Refer to CYLINDER BLOCK : Exploded View . | |||||||||||||
| PNP signal | 4 | Refer to DTC Description . | |||||||||||||
| Engine | Cylinder head | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | Refer to CYLINDER HEAD : Inspection . | |||||
| Cylinder head gasket | 4 | 3 | |||||||||||||
| Cylinder block | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | Refer to CYLINDER BLOCK : Inspection . | |||||
| Piston | |||||||||||||||
| Piston ring | |||||||||||||||
| Connecting rod | |||||||||||||||
| Bearing | |||||||||||||||
| Crankshaft | |||||||||||||||
| Valve mechanism | Timing chain | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | Refer to TIMING CHAIN : Inspection . | |||||
| Camshaft | Refer to CAMSHAFT : Inspection . | ||||||||||||||
| Intake valve timing control | Refer to TIMING CHAIN : Exploded View . | ||||||||||||||
| Intake valve | 3 | Refer to CYLINDER HEAD : Inspection . | |||||||||||||
| Exhaust valve | |||||||||||||||
| Exhaust | Exhaust manifold/Tube/Muffler/Gasket | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | Refer to EXHAUST MANIFOLD AND THREE WAY CATALYST : Inspection . Refer to EXHAUST SYSTEM : Inspection (Removal and Installation) . | |||||
| Three way catalyst | |||||||||||||||
| Lubrication | Oil pan/Oil strainer/Oil pump/Oil filter/Oil gallery/Oil cooler | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | Refer to OIL PAN (LOWER) AND OIL STRAINER : Inspection . Refer to OIL PAN (UPPER) : Inspection . Refer to OIL FILTER : Inspection . Refer to OIL COOLER : Inspection . Refer to OIL PUMP : Inspection . | |||||
| Oil level (Low)/Filthy oil | Refer to ENGINE OIL : Inspection . | ||||||||||||||
| Cooling | Radiator/Hose/Radiator filler cap | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 5 | Refer to RESERVOIR TANK CAP : Inspection . Refer to RADIATOR : Inspection . | ||||
| Water pump | Refer to WATER PUMP : Inspection . | ||||||||||||||
| Water gallery | Refer to WATER PUMP : Inspection . | ||||||||||||||
| Cooling fan | 5 | Refer to ENGINE COOLING FAN : Inspection . | |||||||||||||
| Coolant level (Low)/Contaminated coolant | Refer to ENGINE COOLANT : Inspection . | ||||||||||||||
| Multi-way control valve | 4 | Refer to MULTI-WAY CONTROL VALVE : Inspection . | |||||||||||||
| IVIS (INFINITI Vehicle Immobilizer System - NATS) | 1 | 1 | Refer to Work Flow . | ||||||||||||
1 - 6: The numbers refer to the order of inspection.
* : For the details of the EXP-800 NI or GR8-1200 NI, Refer to SPECIAL SERVICE TOOL : Preparation .