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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 416 (Engine Control System - Introduction) >> Basic Service Procedure >> Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment >> Inspection Procedure >> 26. Check CO% >> Without CONSULT-II

Without CONSULT-II

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.
  2. Turn ignition switch OFF.
  3. Disconnect engine coolant temperature sensor harness connector.
  4. Connect a resistor (4.4 kΩ) between terminals of engine coolant temperature sensor harness connector.
  5. Start engine and rev it (2,000 to 3,000 RPM) two or three times under no load, then run engine at idle speed.
  6. Check CO%.
    1. Idle CO: 0.7 - 9.9% and engine runs smoothly. 
  7. After checking CO%, turn ignition switch OFF, disconnect the resistor from the terminals of engine coolant temperature sensor harness connector, and then connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.
    Fig 1: Checking Engine Coolant Temperature Sensor
    G00875279Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

  1. OK: GO TO 28 .
  2. NG: GO TO 27.
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