Without CONSULT-II

1. Let engine idle.
2. Read the voltage signal between ECM terminals 18, 19, 20, 21, 29, 30, 31, 32 and ground with an oscilloscope.
   Fig 1: Checking Voltage Signal Between ECM Terminals & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Verify that the oscilloscope screen shows the signal wave as shown below.
   Fig 2: Oscilloscope Graph

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO 11. CHECK CONDENSER CIRCUIT FOR OPEN AND SHORT .