Procedure For Malfunction B

With CONSULT-III

1. Turn ignition switch ON.
2. Start engine and warm it up to normal operating temperature.

   If engine cannot be started, go to  "DIAGNOSIS PROCEDURE ".

3. Select "DATA MONITOR" mode with CONSULT-III.
4. Check the voltage of "MAS A/F SE-B1" with "DATA MONITOR".
5. Increases engine speed to about 4, 000 RPM.
6. Monitor the linear voltage rise in response to engine speed increases.

   If NG, go to "DIAGNOSIS PROCEDURE ".

   If OK, go to following step.

   Fig 1: Mass Air Flow Sensor Voltage Graph

   Courtesy of NISSAN MOTOR CO., U.S.A.
7. Maintain the following conditions for at least 10 consecutive seconds.
   TESTING CONDITION REFERENCE CHART
   
   

   ENG SPEED	More than 2, 000 RPM
   TP SEN 1-B1	More than 1.5V
   TP SEN 2-B1	More than 1.5V
   Shift lever	Suitable position
   Driving location	Driving vehicle uphill (Increased engine load) will help maintain the driving conditions required for this test.

8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to "DIAGNOSIS PROCEDURE ".