Overall Function Check

Use this procedure to check the overall function of the EGRC-BPT valve. During this check, a 1st trip DTC might not be confirmed.

WITH GST 

1. Install vacuum gauge between EGRC-BPT valve and EGR valve as shown in the illustration.
2. Lift up vehicle.
3. Start engine and shift to 1st gear position.
4. Check vacuum gauge while keeping engine speed at 2,400 to 3,200 RPM.

   Vacuum should be 0 to -20 kPa (0 to -150 mmHg, 0 to -5.91 inHg). 

   If NG, go to DIAGNOSTIC PROCEDURE .

   If OK, go to next step.

   Fig 1: Checking Vacuum Gauge

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check the EGR valve lifting when revving from 2,000 RPM to 4,000 RPM quickly under no load.

   EGR valve should lift up, and go down without sticking when the engine is returned to idle.

6. Check rubber tube between intake manifold collector, EGRC solenoid valve, EGR valve and EGRC-BPT valve for misconnection, cracks or blockages.
7. If NG, go to DIAGNOSTIC PROCEDURE .