DTC P0403: EGR Valve Circuit Open Turn the ignition switch ON (II). Clear the DTC with the HDS. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0403 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EGR valve and the ECM.■
Check for Temporary DTCs or DTCs with the HDS. Are DTC P0045, P0403 and P2008 indicated at same time?
YES | - | Go to Step 5 .
NO | - | Go to Step 10 .
Turn the ignition switch OFF. Check No. 10 IGP2 (20 A) fuse in the under-hood fuse/relay box. Is the fuse OK?
YES | - | Go to Step 7 .
NO | - | Repair short in the wire between No. 10 IGP2 (20 A) fuse and PGM-FI main relay 2, then go to Step 21 . Repair short in the wire between PGM-FI main relay 2 and the EGR valve, the IMRC solenoid, the turbocharger boost control solenoid, then go to Step 21 .
Check PGM-FI main relay 2. Is PGM-FI main relay 2 OK?
YES | - | Go to Step 8 .
NO | - | Replace PGM-FI main relay 2, then go to Step 22 .
Disconnect PGM-FI main relay 2. Measure voltage between PGM-FI main relay 2 4P connector terminal No. 1 and body ground. Is there battery voltage?
YES | - | Repair open in the wire between PGM-FI main relay 2 and the EGR valve, the IMRC solenoid, the turbocharger boost control solenoid, then go to Step 21 .
NO | - | Repair open in the wire between No. 10 IGP2 (20 A) fuse in the under-hood fuse/relay box and PGM-FI main relay 2, then go to Step 21 .
Turn the ignition switch OFF. Disconnect the EGR valve 6P connector. Turn the ignition switch ON (II). |