EGR Control System Inspection

Crank the engine and verify that EGR valve operation (initial operation) sound is heard.
- If the operation sound is not heard, connect the M-MDS to the DLC-2 and verify that the DTC P0403:00 is shown. Perform DTC inspection (See DTC TABLE [L5] .)
Start the engine and idle it
Warm up the engine to normal operating temperature
Access the following PIDs:
- ECT, RPM, SEGRP_DSD, APP1, APP2, VSS
Idle the vehicle and verify that the SEGRP value is 0
Put the vehicle in drive
Depress the accelerator pedal and verify that the SEGRP_DSD value is increased.
- If the EGR valve increases, inspect the following:
  - EGR valve (stuck open or close)
  - Wiring harness and connectors (Main relay - EGR valve - PCM)
- If the SEGRP_DSD value does not increase, inspect the VSS, APP1, APP2, TP_REL and ECT PIDs. (See PCM INSPECTION [L5] .)
Stop the vehicle and verify that the SEGRP value returns to 0.