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Home >> Nissan-Datsun >> 2003 >> Maxima GLE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0101: Mass Airflow Sensor Circuit Range/Performance Problem >> DTC Confirmation Test "B" (Using CONSULT-II)

DTC Confirmation Test "B" (Using CONSULT-II)

  1. Turn ignition on. Start engine and warm to normal operating temperature. If engine will not start, go to DIAGNOSTIC PROCEDURE . If engine starts, go to next step.
  2. Select DATA MONITOR mode with CONSULT-II. Observe MAS A/F SE B1 voltage while increasing engine speed to 4000 RPM. Monitor the linear voltage increase in response to engine speed increase. See Fig 1. If voltage is as specified, go to next step. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE .
  3. Maintain the following conditions for at least 10 consecutive seconds:
    • ENG SPEED: more than 2000 RPM.
    • THRTL SEN 1: more than 3 volts.
    • THRTL SEN 2: more than 3 volts.
    • Selector lever: suitable position.
    • Driving location: drive vehicle uphill to increase engine load.
  4. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE . If 1st trip DTC is not detected, system is okay at this time.
Fig 1: Monitoring Linear Voltage Rise
G00251470Courtesy of NISSAN MOTOR CO., U.S.A.
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