EGR System Test

WARNING: Apply parking brake and/or block wheels before testing the EGR system.

1. Warm up the engine and bring to operating temperature before performing the proceeding tests.
2. Check the condition of all EGR system hoses and tubes for leaks, cracks, kinks and hardening of rubber hoses. Repair and correct these conditions before performing any tests.

EGR Valve And Control:

3. Be sure the hoses at both the EGR valve and EGR valve control are connected to the proper fittings.
4. Be sure the electrical connector is firmly connected at the valve control.

Data Link Connector-Typical:

5. To check EGR system operation, connect the DRB scan tool to the data link connector. The data link connector is located in the engine compartment.
6. After checking the system with the DRB scan tool, proceed to the following: EGR Valve Leakage Test, or EGR Valve Control Test and repair as necessary.