EGR Cooler Inspection
- Verify that there is airflow from port B when pressure is applied from port A.
- If there is no airflow, replace the EGR cooler. (See EGR COOLER REMOVAL/INSTALLATION .)
- Verify that there is airflow from port D when pressure is applied from port C.
- If there is no airflow, replace the EGR cooler. (See EGR COOLER REMOVAL/INSTALLATION .)