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Engine Controls - Trouble Shooting - No Codes: Other Nissan 350Z I

Testing & Diagnostics ~2742 words

HARD START OR NO START (CRANKS NORMALLY)

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check fuel pump circuit and fuel injector circuits. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Check electric throttle control actuator.
  3. Check ignition circuit.
  4. Check Mass Airflow (MAF) sensor circuit.
  5. Check Engine Coolant Temperature (ECT) sensor circuit.
  6. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  7. Check Nissan Vehicle Immobilizer System (NVIS).
  8. Check IACV-AAC valve circuit.
  9. Check IACV-FICD valve circuit.
  10. Check EGR system.
  11. Check main power supply and ground circuit.
  12. Check Crankshaft Position (POS) sensor circuit.
  13. Check Camshaft Position (CMP) sensor circuit.
  14. Check ECM power supply and ground circuits.
  15. Check start signal circuit.
  16. Check air conditioner circuit.
  17. Check fuel pressure regulator.
  18. Check EVAP system.
  19. Check PCV system.
  20. Check ignition timing and idle speed adjustment. See «ON-VEHICLE ADJUSTMENTS»(ref-151928) article.
  21. Check intake valve timing control solenoid valve circuit.
  22. Check start signal circuit.
  23. Check Park Neutral Position (PNP) switch.
  24. Check fuel tank and fuel piping.
  25. Check for valve deposit or poor fuel such as heavy weight gasoline or low octane.
  26. Check for air leakage from air duct and inspect Mass Airflow (MAF) Sensor.
  27. Check electric throttle control actuator.
  28. Visually inspect air intake system for leaks or restrictions.
  29. Check cylinder head and cylinder head gasket.
  30. Check timing chain and camshaft.
  31. Check intake valve timing control, intake valve and exhaust valve.
  32. Check exhaust manifold, exhaust tube, muffler and exhaust gasket.
  33. Check three way catalyst.
  34. Check oil pan, oil strainer, oil pump, oil filter, oil gallery and oil cooler.
  35. Check oil level or oil contamination.
  36. Check radiator, radiator hose and radiator filler cap.
  37. Check thermostat, water pump and water gallery.
  38. Check cooling fan.
  39. Check cooling coolant level or coolant contamination.
  40. Check cranking signal plate.
  41. Check cylinder block, piston and piston ring.
  42. Check connecting rod, bearing and crankshaft.
  43. Check cooling fan.

ENGINE STALLS

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check fuel pump circuit.
  2. Check fuel injector circuits.
  3. Check IACV-AAC valve circuit.
  4. Check electric throttle control actuator.
  5. Check ignition circuit.
  6. Check EGR system.
  7. Check Mass Airflow (MAF) sensor circuit.
  8. Check A/F sensor one.
  9. Check Engine Coolant Temperature (ECT) sensor circuit.
  10. Check heated oxygen sensor one circuit.
  11. Check Throttle Position (TP) sensor circuit.
  12. Check battery and generator circuit.
  13. Check Nissan Vehicle Immobilizer System (NVIS).
  14. Check IACV-FICD valve circuit.
  15. Check EGRC-solenoid valve circuit.
  16. Check main power supply and ground circuit.
  17. Check Crankshaft Position (POS) sensor circuit.
  18. Check Camshaft Position (CMP) sensor circuit.
  19. Check Vehicle Speed Sensor (VSS) circuit.
  20. Check power steering pressure switch circuit.
  21. Check ECM power supply and ground circuits.
  22. Check refrigerant pressure sensor circuit.
  23. Check air conditioner circuit.
  24. Check fuel pressure regulator. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  25. Check EVAP system.
  26. Check PCV system.
  27. Check for incorrect idle speed adjustment.
  28. Check ignition timing and idle speed adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  29. Check throttle position sensor adjustment.
  30. Check intake valve timing control solenoid valve circuit.
  31. Check fuel tank and fuel piping.
  32. Check vapor lock and valve deposit.
  33. Check for poor fuel, heavy weight gasoline or for low octane.
  34. Check air duct and air cleaner.
  35. Check for air leakage from air duct.
  36. Check electric throttle control actuator.
  37. Check for air leakage from intake manifold, air collector and gasket.
  38. Check cylinder head and cylinder head gasket.
  39. Check timing chain and camshaft.
  40. Check intake valve timing control and intake valve.
  41. Check exhaust valve.
  42. Check exhaust manifold, exhaust tube, muffler and exhaust gasket.
  43. Check three way catalyst.
  44. Check oil pan, oil strainer, oil pump, oil filter, oil gallery and oil cooler.
  45. Check oil level or for contaminated oil.
  46. Check radiator, radiator hose and radiator filler cap.
  47. Check thermostat, water pump and water gallery.
  48. Check cooling fan.
  49. Check coolant level or for contaminated coolant.
  50. Check cylinder block, piston and piston ring.
  51. Check connecting rod, bearing and crankshaft.
  52. Check hydraulic lash adjuster.
  53. Check cooling fan.

HESITATION OR SURGE

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check ignition timing adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check throttle position sensor adjustment.
  3. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  4. Check fuel pump circuit.
  5. Check fuel injector circuits.
  6. Check electric throttle control actuator.
  7. Check ignition circuit.
  8. Check EGRC-solenoid valve circuit.
  9. Check EGR system.
  10. Check camshaft position sensor circuit.
  11. Check Mass Airflow (MAF) sensor circuit.
  12. Check A/F sensor one.
  13. Check Engine Coolant Temperature (ECT) sensor circuit.
  14. Check heated oxygen sensor one circuit.
  15. Check Throttle Position (TP) sensor circuit.
  16. Check knock sensor circuit.
  17. Check intake valve timing control solenoid valve circuit.
  18. Check IACV-AAC valve circuit.
  19. Check IACV-FICD valve circuit.
  20. Check fuel pressure regulator. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  21. Check EVAP system.
  22. Check positive crankcase ventilation system.
  23. Check main power supply and ground circuits.
  24. Check accelerator pedal position sensor circuit.
  25. Check vehicle speed signal circuit.
  26. Check ECM.
  27. Check PNP switch circuit.
  28. Check air conditioner circuit.
  29. Check VDC control unit, TCS control unit, ABS control unit, ABS actuator and electric unit.
  30. Check fuel piping.
  31. Check fuel valve for deposit.
  32. Check for poor fuel quality, heavy weight gasoline and low octane.
  33. Check air duct and air cleaner.
  34. Check for air leakage from air duct.
  35. Check electric throttle control actuator.
  36. Check for air leakage from intake manifold, air collector and gasket.
  37. Check cylinder head and cylinder head gasket.
  38. Check timing chain and camshaft.
  39. Check intake valve timing control and intake valve.
  40. Check exhaust valve.
  41. Check exhaust manifold, exhaust tube, muffler and exhaust gasket.
  42. Check three way catalyst.
  43. Check oil pan, oil strainer, oil pump, oil filter, oil gallery and oil cooler.
  44. Check oil level or for oil contamination.
  45. Check radiator, radiator hose and radiator filler cap.
  46. Check thermostat, water pump and water gallery.
  47. Check cooling fan.
  48. Check coolant level and for coolant contamination.
  49. Check cylinder block, piston and piston ring.
  50. Check connecting rod, bearing and crankshaft.
  51. Check hydraulic lash adjuster.
  52. Check cooling fan.

SPARK KNOCK/DETONATION

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check ignition timing adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check ignition circuit.
  3. Check camshaft position sensor circuit.
  4. Check Mass Airflow (MAF) sensor circuit.
  5. Check accelerator pedal position sensor circuit.
  6. Check knock sensor circuit.
  7. Check A/F sensor one.
  8. Check fuel pump circuit.
  9. Check fuel injector circuits.
  10. Check IACV-AAC valve circuit.
  11. Check IACV-FICD valve circuit.
  12. Check EGRC-solenoid valve circuit.
  13. Check EGR system.
  14. Check main power supply and ground circuits.
  15. Check Engine Coolant Temperature (ECT) sensor circuit.
  16. Check heated oxygen sensor one circuit.
  17. Check ECM.
  18. Check air conditioner circuit.
  19. Check fuel pressure regulator system.
  20. Check EVAP system.
  21. Check PCV system.
  22. Check electric throttle control actuator.
  23. Check fuel piping.
  24. Check for poor fuel, heavy weight gasoline or low octane.
  25. Check for air leakage from air duct.
  26. Check electric throttle control actuator.
  27. Check for air leakage from intake manifold, air collector and gasket.
  28. Check cylinder head and cylinder head gasket.
  29. Check timing chain and camshaft.
  30. Check intake valve timing control, intake valve and exhaust valve.
  31. Check exhaust manifold, tube, muffler, and gasket.
  32. Check three way catalyst.
  33. Check oil pan, oil strainer, oil pump, oil filter, oil gallery, and oil cooler.
  34. Check oil level and condition.
  35. Check radiator, hose and radiator filler cap.
  36. Check thermostat, water pump and water gallery.
  37. Check cooling fan.
  38. Check coolant level and for contamination.
  39. Check cylinder block, piston and piston ring.
  40. Check connecting rod, bearing and crankshaft.
  41. Check hydraulic lash adjuster.
  42. Check cooling fan.

LACK OF POWER/POOR ACCELERATION

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check ignition timing adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check throttle position sensor adjustment.
  3. Check accelerator pedal position sensor circuit.
  4. Check intake valve timing control solenoid valve circuit.
  5. Check VIAS control solenoid valve circuit.
  6. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  7. Check fuel pump circuit.
  8. Check fuel injector circuits.
  9. Check ignition circuits.
  10. Check camshaft position sensor circuit.
  11. Check Mass Airflow (MAF) sensor circuit.
  12. Check A/F sensor one.
  13. Check Engine Coolant Temperature (ECT) sensor circuit.
  14. Check heated oxygen sensor one circuit.
  15. Check Throttle Position (TP) sensor circuit.
  16. Check IACV-AAC valve circuit.
  17. Check IACV-FICD valve circuit.
  18. Check EGRC-solenoid valve circuit.
  19. Check EGR system.
  20. Check electric throttle control actuator.
  21. Check main power supply and ground circuits.
  22. Check Vehicle Speed Sensor (VSS) circuit.
  23. Check ECM.
  24. Check PNP switch circuit.
  25. Check air conditioner circuit.
  26. Check fuel pressure regulator. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  27. Check EVAP system.
  28. Check PCV system.
  29. Check fuel piping and valve deposit.
  30. Check fuel condition.
  31. Check air duct and air cleaner.
  32. Check for air leakage from air duct.
  33. Check electric throttle control actuator.
  34. Check air leakage from intake manifold, collector and gasket.
  35. Check cylinder head and gasket.
  36. Check timing chain and camshaft.
  37. Check intake valve timing control, intake valve and exhaust valve.
  38. Check exhaust manifold, tube, muffler, and gasket.
  39. Check three way catalyst.
  40. Check oil pan, oil strainer, oil pump, oil filter, oil gallery, and oil cooler.
  41. Check oil level and condition.
  42. Check radiator, hose and radiator filler cap.
  43. Check thermostat, water pump and water gallery.
  44. Check cooling fan.
  45. Check coolant level and for contamination.
  46. Check cylinder block, piston and piston ring.
  47. Check connecting rod, bearing and crankshaft.
  48. Check hydraulic lash adjuster.
  49. Check cooling fan.

HIGH OR LOW IDLE

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check idle speed adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check throttle position sensor adjustment.
  3. Check IACV-AAC valve circuit.
  4. Check electric throttle control actuator.
  5. Check Throttle Position (TP) sensor circuit.
  6. Check accelerator pedal position sensor circuit.
  7. Check IACV-FICD valve circuit.
  8. Check EGR system.
  9. Check Engine Coolant Temperature (ECT) sensor circuit.
  10. Check power steering oil pressure switch circuit.
  11. Check ECM.
  12. Check intake valve timing control solenoid valve circuit.
  13. Check PNP switch circuit.
  14. Check refrigerant pressure sensor circuit.
  15. Check electrical load signal circuit.
  16. Check air conditioner circuit.
  17. Check fuel pressure regulator. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  18. Check EVAP system.
  19. Check PCV system.
  20. Check air leakage from air duct.
  21. Check electric throttle control actuator.
  22. Check air leakage from intake manifold, collector and gasket.
  23. Check thermostat.
  24. Check cooling fan.

ROUGH IDLE

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check idle speed and ignition timing adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  3. Check fuel pump circuit.
  4. Check injector circuit.
  5. Check IACV-AAC valve circuit.
  6. Check EGR system.
  7. Check electric throttle control actuator.
  8. Check ignition circuit.
  9. Check camshaft position sensor circuit.
  10. Check Mass Airflow (MAF) sensor circuit.
  11. Check A/F sensor one.
  12. Check Engine Coolant Temperature (ECT) sensor circuit.
  13. Check heated oxygen sensor one circuit.
  14. Check Throttle Position (TP) sensor circuit.
  15. Check intake valve timing control solenoid valve circuit.
  16. Check IACV-FICD valve circuit.
  17. Check main power supply and ground circuits.
  18. Check power steering pressure switch circuit.
  19. Check ECM.
  20. Check Park/Neutral Position (PNP) switch circuit.
  21. Check refrigerant pressure sensor circuit.
  22. Check electrical load signal circuit.
  23. Check air conditioner circuit.
  24. Check fuel pressure regulator system.
  25. Check EVAP system.
  26. Check PCV system.
  27. Check fuel piping and valve deposit.
  28. Check fuel condition.
  29. Check air duct and air cleaner.
  30. Check for air leakage from air duct.
  31. Check electric throttle control actuator.
  32. Check for air leakage from intake manifold, collector and gasket.
  33. Check cylinder head and gasket.
  34. Check timing chain and camshaft.
  35. Check intake valve timing control, intake valve and exhaust valve.
  36. Check exhaust manifold, tube, muffler, and gasket.
  37. Check three way catalyst.
  38. Check oil pan, oil strainer, oil pump, oil filter, oil gallery, and oil cooler.
  39. Check oil level and condition.
  40. Check radiator, hose and filler cap.
  41. Check thermostat, water pump and water gallery.
  42. Check cooling fan.
  43. Check coolant level and condition.
  44. Check cylinder block, piston and piston ring.
  45. Check connecting rod, bearing and crankshaft.
  46. Check hydraulic lash adjuster.
  47. Check cooling fan.

SLOW RETURN TO IDLE OR NO RETURN TO IDLE

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check idle speed adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check throttle position sensor adjustment.
  3. Check IACV-AAC valve circuit.
  4. Check IACV-FICD valve circuit.
  5. Check electric throttle control actuator.
  6. Check Throttle Position (TP) sensor circuit.
  7. Check accelerator pedal position sensor circuit.
  8. Check EGR system.
  9. Check Engine Coolant Temperature (ECT) sensor circuit.
  10. Check power steering oil pressure switch circuit.
  11. Check ECM.
  12. Check intake valve timing control solenoid valve circuit.
  13. Check PNP switch circuit.
  14. Check refrigerant pressure sensor circuit.
  15. Check electrical load signal circuit.
  16. Check air conditioner circuit.
  17. Check fuel pressure regulator. See «FUEL SYSTEM»(ref-151932-S39761067842003010900000) in BASIC DIAGNOSTIC PROCEDURES article.
  18. Check EVAP system.
  19. Check PCV system.
  20. Check air leakage from air duct.
  21. Check electric throttle control actuator.
  22. Check air leakage from intake manifold, collector and gasket.
  23. Check thermostat.
  24. Check cooling fan.
  25. Check cooling fan.
  26. Check coolant level and condition.

OVERHEATS OR WATER TEMPERATURE HIGH

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check ECT sensor circuit.
  2. Check main power supply and ground circuit.
  3. Check cooling fan.
  4. Check ECM.
  5. Check cylinder head gasket.
  6. Check radiator, hose and filler cap.
  7. Check thermostat, water pump and water gallery.
  8. Check coolant level and contamination.

EXCESSIVE FUEL CONSUMPTION

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check idle speed and ignition timing adjustment. See «IDLE SPEED, IGNITION TIMING & IDLE MIXTURE RATIO ADJUSTMENT»(ref-151928-S19799417862003010900000) in ON-VEHICLE ADJUSTMENTS article.
  2. Check throttle position sensor adjustment.
  3. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  4. Check starter circuit and signal plate.
  5. Check PNP switch.
  6. Check injector circuit.
  7. Check electric throttle control actuator.
  8. Check ignition circuit.
  9. Check camshaft position sensor circuit.
  10. Check Mass Airflow (MAF) sensor circuit.
  11. Check A/F sensor one.
  12. Check Engine Coolant Temperature (ECT) sensor circuit.
  13. Check heated oxygen sensor one circuit.
  14. Check Throttle Position (TP) sensor circuit.
  15. Check fuel pump circuit.
  16. Check IACV-AAC valve circuit.
  17. Check IACV-FICD valve circuit.
  18. Check EGRC-solenoid valve circuit.
  19. Check EGR system.
  20. Check main power supply and ground circuits.
  21. Check knock sensor circuit.
  22. Check vehicle speed signal circuit.
  23. Check ECM.
  24. Check intake valve timing control solenoid valve circuit.
  25. Check Park/Neutral Position (PNP) switch circuit.
  26. Check air conditioner circuit.
  27. Check fuel pressure regulator system.
  28. Check EVAP system.
  29. Check PCV system.
  30. Check refrigerant pressure sensor circuit.
  31. Check fuel piping and valve deposit.
  32. Check fuel condition.
  33. Check air duct and air cleaner.
  34. Check for air leakage from air duct.
  35. Check electric throttle control actuator.
  36. Check for air leakage from intake manifold, collector and gasket.
  37. Check cylinder head and gasket.
  38. Check timing chain and camshaft.
  39. Check intake valve timing control, intake valve and exhaust valve.
  40. Check exhaust manifold, tube, muffler, and gasket.
  41. Check three way catalyst.
  42. Check oil pan, oil strainer, oil pump, oil filter, oil gallery, and oil cooler.
  43. Check oil level and condition.
  44. Check radiator, hose and filler cap.
  45. Check thermostat, water pump and water gallery.
  46. Check cooling fan.
  47. Check coolant level and condition.
  48. Check cylinder block, piston and piston ring.
  49. Check connecting rod, bearing and crankshaft.
  50. Check hydraulic lash adjuster.
  51. Check cooling fan.

EXCESSIVE OIL CONSUMPTION

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check PCV system.
  2. Check oil pan, oil strainer, oil pump, oil filter, and oil gallery.
  3. Check oil level and condition.
  4. Check cylinder head gasket.
  5. Check intake valve and exhaust valve.
  6. Check cylinder block, piston and piston ring.

BATTERY DEAD OR UNDER CHARGE

Note. Unless otherwise indicated, see appropriate SYSTEM & COMPONENT TESTING article for testing procedures.

  1. Check IACV-AAC valve circuit.
  2. Check battery and generator circuit. See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
  3. Check main power supply and ground circuit.
  4. Check fuel pump circuit.
  5. Check electric throttle control actuator.
  6. Check air conditioner circuit.

Intermittent Simulation

To reproduce conditions creating an intermittent fault, use following methods

  1. Gently vibrate component.
  2. Heat component.
  3. Freeze component.
  4. Wiggle or bend wiring harness.
  5. Spray component with water.
  6. Turn on all electrical accessories.

Monitor circuit/component voltage or resistance while simulating intermittent. If engine is running, monitor for Diagnostic Trouble Codes (DTCs.) Use test results to identify a faulty component or circuit.

More articles — Engine Controls - Trouble Shooting - No Codes