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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> Trouble Diagnosis >> Basic Inspection >> 1. Inspection Start
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1. Inspection Start

  1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
  2. Open engine hood and check the following:
    • Harness connectors for improper connections
    • Wiring harness for improper connections, pinches and cut
    • Vacuum hoses for splits, kinks and improper connections
    • Hoses and ducts for leaks
    • Air cleaner clogging
    • Gasket
  3. Confirm that electrical or mechanical loads are not applied.
    • Headlamp switch is OFF.
    • Air conditioner switch is OFF.
    • Rear window defogger switch is OFF.
    • Steering wheel is in the straight-ahead position, etc.
  4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.

    Ensure engine stays below 1,000 RPM.

  5. Run engine at about 2,000 RPM for about 2 minutes under no load.
  6. Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG 

OK : GO TO 3. CHECK TARGET IDLE SPEED .

NG : GO TO 2.