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ENGINE CONTROL SYSTEM SYMPTOMS EC-589 < SYMPTOM DIAGNOSIS > [VQ37VHR] C D E F G H I J K L M A EC N P O SYMPTOM DIAGNOSIS ENGINE CONTROL SYSTEM SYMPTOMS Symptom Table INFOID:0000000001734354 SYSTEM — BASIC ENGINE CONTROL SYSTEM SYMPTOM Reference HARD/NO ST AR T /REST AR T (EXCP . H A ) ENGINE ST ALL HESIT A TION/SURGING/FLA T SPOT SP ARK KNOCK/DET O NA TION LACK OF POWER/ POOR ACC E LERA TION HIGH IDL E/LOW IDLE ROUG H IDLE/HUNTING IDLI NG VIBRA TION SLOW/NO RETURN T O IDLE OVERHEA T S/W A TER TEMPERA T UR E HIGH EXCESS IVE F U E L CONSUMP T IO N EXCESS IVE OIL CONSUMP T ION BA TTER Y DEAD (UNDER CHARGE) Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2 Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4 Fuel injector circuit 1 1 2 3 2 2 2 2 Evaporative emission system 3 3 4 4 4 4 4 4 4 4 Air Positive crankcase ventilation sys- 3 3 4 4 4 4 4 4 4 4 1 Incorrect idle speed adjustment 1 1 1 1 1 Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2 , Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1 Ignition circuit 1 1 2 2 2 2 2 2 Main power supply and ground circuit 2 2 3 3 3 3 3 2 3 Mass air flow sensor circuit 1 1 2 2 2 2 2 2 , Engine coolant temperature sensor circuit 3 3 3 , Air fuel ratio (A/F) sensor 1 circuit , , , , Throttle position sensor circuit 2 2 , , , , Accelerator pedal position sensor circuit 3 2 1 , , Knock sensor circuit 2 3 |