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4. CHECK FOR INTAKE SYSTEM AIR LEAKS Remove the Crankcase Vent Heater. Remove the Mass Air Flow Sensor from the turbocharger inlet tube. Seal off and/or plug the turbocharger inlet tube where the MAF sensor was removed. Connect smoke machine 84–04 to the Crankcase Vent Heater port in the intake duct and begin injecting smoke into Observe all intake system components for evidence of smoke leakage. Is there evidence of smoke leakage? Yes >> Repair or replace as necessary. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 5 5. REPLACE THE BOOST PRESSURE SERVO MOTOR Replace the Boost Pressure Servo Motor in accordance with the Service Information. NOTE: Ensure the Boost Pressure Servo Motor and ECM harness connectors are connected. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Replace the Turbocharger assembly in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Test complete. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1260 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |