Diagnostic Information Engine Emits Excessive Black or Gray Exhaust Smoke JC89288,0000060 –19–26MAY06–1/1 Engine Emits Excessive Black or Gray Exhaust Smoke Diagnostic Procedure NOTE: This procedure should be used if the engine emits excessive black or gray smoke. If engine emits a less heavy, bluish exhaust smoke, See Engine Uses Too Much Oil. (Group 9010-15.) –1/1 TM2361 (24JUN08) 9010-15-22 450DLC Excavator Operation and Tests 062608 PN=292 1 Preliminary Check 1. Ensure fuel quantity and quality are OK. 2. Ensure engine is not excessively loaded. 3. Ensure air filter is not restricted or plugged. Was the problem found? YES: Repair and retest NO: Go to Active DTC Check.
– – –1/1 9010 15 22 2 Active DTC Check Perform the Active DTC Check to read Diagnostic Trouble Codes (DTCs). See Reading Diagnostic Trouble Codes With Tech 2 Diagnostic Scan Tool. (Group 9015-20.) Are any DTCs detected? YES: See Engine Diagnostic Trouble Codes (DTCs—SPN.FMI Format) for information on code. (Group 9001-20.) NO: No active DTCs present. Go to Air Intake System Leakage Test. – – –1/1 3 Air Intake System Leakage Test Perform Air Intake System Leakage Test See Air Intake System Leakage Test. (Group 9010-15.). Did the air system check good? YES: Go to EGR Control System Check. NO: Repair or replace parts as necessary and retest.
– – –1/1 4 EGR Control System Check Perform EGR Control System Check. See EGR Control System Check. (Group 9010-25.) Is the EGR valve free to open and close properly? YES: Go to Reed Valve Check. NO: Replace EGR valve and retest. – – –1/1