Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

1. 4
   
   When using the scan tool to increment the EGR valve, increment the valve to 10 percent then to 0 percent. Repeat this process to see if the test lamp turns on then off. If the test lamp stays on after commanded to 0 percent the EGR solenoid high control circuit is shorted to voltage.
2. 5
   
   This step tests for an open in the ground circuit to the solenoid.
3. 6
   
   This step tests if voltage is constantly being applied to the solenoid.