ASCD Pump

1. Disconnect vacuum hose from ASCD pump and ASCD pump harness connector.
2. If necessary remove ASCD pump.
3. Connect vacuum gauge to ASCD pump.
4. Apply 12V direct current to ASCD pump and check operation.

Fig 1: ASCD Pump Components Operation Chart

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

A vacuum pressure of at least - 40 kPa (- 0.41 kg/cm ² , - 5.8 psi) should be generated. 

Fig 2: Checking ASCD Pump Component Operation

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