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Home >> Infiniti >> 2017 >> QX60 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis, Symptom Diagnosis & Removal And Installation) (Except Hybrid) >> Symptom Diagnosis >> Engine Control System Symptoms >> Symptom Table >> System - Basic Engine Control System
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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 COMPONENT FUNCTION CHECK 
Fuel pressure regulator system 3 3 4 4 4 4 4 4 4   4     WORK PROCEDURE
Fuel injector circuit 1 1 2 3 2   2 2     2     COMPONENT FUNCTION CHECK 
Evaporative emission system 3 3 4 4 4 4 4 4 4   4     SYSTEM DESCRIPTION
FRP sensor circuit 1 1 2 2 2   2 2     2     DTC DESCRIPTION
High pressure fuel pump circuit     4   3                 DTC DESCRIPTION
Air Positive crankcase ventilation system 3 3 4 4 4 4 4 4 4   4 1   INSPECTION 
Incorrect idle speed adjustment       1 1 1 1   1     WORK PROCEDURE
Electric throttle control actuator 1 1 2 3 3 2 2 2 2   2   2 DTC DESCRIPTION , DTC DESCRIPTION
Ignition Incorrect ignition timing adjustment 3 3 1 1 1   1 1     1     WORK PROCEDURE
Ignition circuit 1 1 2 2 2   2 2     2     COMPONENT FUNCTION CHECK 
Main power supply and ground circuit 2 2 3 3 3   3 3   2 3     DIAGNOSIS PROCEDURE
Mass air flow sensor circuit 1 1 2 2 2   2 2     2     DTC DESCRIPTION , DTC DESCRIPTION
Engine coolant temperature sensor circuit 3 3 3       DTC DESCRIPTION , DTC DESCRIPTION
Air fuel ratio (A/F) sensor 1 circuit             DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION
Throttle position sensor circuit     2 2       DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION
Accelerator pedal position sensor circuit     3 2 1             DTC DESCRIPTION , DTC DESCRIPTION , DTC DESCRIPTION
Heated oxygen sensor 2 circuit     6   6   6 6     5     DTC DESCRIPTION
Knock sensor circuit     2               3     DTC DESCRIPTION
Engine oil temperature sensor circuit     4   2           3     DTC DESCRIPTION , DTC DESCRIPTION
Engine oil pressure sensor circuit     4   4 3 3 3     3     DTC DESCRIPTION
Crankshaft position sensor circuit 2 2                       DTC DESCRIPTION
Intake camshaft position sensor circuit     3   2 3               DTC DESCRIPTION , DTC DESCRIPTION
Exhaust camshaft position sensor circuit 2 2     3   3 3           DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE
Vehicle speed signal circuit   2 3   3           3     DTC DESCRIPTION
ECM 2 2 3 3 3 3 3 3 3 3 3     -
Electric intake valve timing control module circuit     3   3 3               DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE
Electric intake valve timing control actuator circuit         3                 DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE , DIAGNOSIS PROCEDURE 
Exhaust valve timing control solenoid valve circuit 2 2 2   2   2 2           DTC DESCRIPTION , DTC DESCRIPTION
PNP signal circuit     3   3   3 3     3     DTC DESCRIPTION
Refrigerant pressure sensor circuit   2       3     3   4     COMPONENT FUNCTION CHECK 
Electrical load signal circuit             3             COMPONENT FUNCTION CHECK 
Air conditioner circuit 2 2 3 3 3 3 3 3 3   3   2 WORK FLOW
ABS actuator and electric unit (control unit)     4                     WORK FLOW

1 - 6: The numbers refer to the order of inspection.

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