DESCRIPTION:Exhaust Gas Recirculation (EGR) cooler performance monitor.
MONITORED PARAMETER:Intake manifold temperature sensor.
TYPICAL ENABLING CONDITIONS:1. Engine running greater than five minutes.2. EGR mass flow greater than .08.3. Intake manifold temperature less than 125°C (257°F).4. Engine speed 1200-2500 RPM.5. Engine torque 500-2500 N·m.6. Coolant temperature greater than 65°C (149°F).7. Ambient temperature less than 45°C (113°F) ambient.8. Barometric pressure greater than 755 mbar (10.95 psi).
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Always enabled
TYPICAL DURATION:30
DASH LAMPS:1. MIL
ENGINE REACTION:None
VERIFICATION:1.When ambient temperature less than 45°C (113°F).2. Start engine.3. Warm up so coolant temperature greater than 65°C (149°F).4. Ambient barometric pressure greater than 755 mbar (10.95 psi).
NOTE: If there are any cooling system related issues, fix those first.
PROBABLE CAUSES:1. Intake manifold air temperature sensor.2. Intake manifold air temperature sensor connector/harness.3. EGR system leaks (Look for soot).4. Remove the EGR hot pipe, EGR crossover tube, and mixer pipe. If blockage found, replace the EGR Cooler.