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TROUBLE DIAGNOSIS EC-91 C D E F G H I J K L M A EC Symptom Matrix Chart NBS001R2 SYSTEM — BASIC ENGINE CONTROL SYSTEM SYMPTOM Reference HARD/NO ST AR T/REST AR T ( EXCP . HA) ENGINE ST AL L HESIT A TI ON/SURGI N G/FL A T SPOT SP ARK KNOCK/ DET O NA TION L A CK OF POW E R/POOR A C CE L E RA TI ON HIGH IDL E /L OW IDL E ROUGH IDL E /HUNTIN G IDLING VIBRA T IO N SL OW /NO RETURN T O IDL E OVERHEA T S/W A TER T E M P ERA T U R E HIGH EXCESSIVE FUEL CONSUM P T ION EXCESSIVE OI L CONSUM P T IO N 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 A/F sensor 1 circuit Throttle position sensor circuit 2 2 Accelerator pedal position sensor circuit 3 2 1 Knock sensor circuit 2 3 Crankshaft position sensor (POS) circuit 2 2 Camshaft position sensor (PHASE) circuit 3 2 Vehicle speed signal circuit 2 3 3 3 |