EGR Valve
- Connect scan tool to Data Link Connector (DLC). Start engine and warm up to operating temperature. With engine at idle, select MISC. TEST parameter on scan tool and operate EGR valve. If engine RPM drops, EGR valve is okay. Go to DTC P0400: EXHAUST GAS RECIRCULATION (EGR) FLOW MALFUNCTION in appropriate SELF-DIAGNOSTICS article if other EGR system problems are suspected. If engine RPM did not drop, go to next step.
- Turn ignition off. Remove EGR valve and inspect EGR passages for clogs. Clean out passages as necessary. Using DVOM, inspect EGR valve resistance between terminals. See Fig 1 for terminal identification. See EGR VALVE RESISTANCE table for specifications.
EGR VALVE RESISTANCE
| EGR Terminals | Resistance/Ohms |
|---|---|
| "A" & "B" | 20-24 |
| "C" & "B" | 20-24 |
| "F" & "E" | 20-24 |
| "D" & "E" | 20-24 |
| "B" & EGR Valve Body | No Continuity |
| "E" & EGR Valve Body | No Continuity |