Exhaust Gas Recirculation: Testing and Inspection

System Inspection
1. Connect the special service tool (SST) (Engine Signal Monitor Adaptor Harness) to the powertrain control module engine (PCME) as shown.
2. Start the engine.
3. Accelerate the engine and verify that PCME terminal 40 voltage is (B+) while the engine is still cold.
4. Warm up the engine to normal operating temperature and run it at idle.
5. Short the PCME terminal 40 and verify that the engine runs rough or stalls at idle.