Diagnostic Information TM2361 (24JUN08) 9010-15-21 450DLC Excavator Operation and Tests 062608 PN=291 3 Injector Check 1. Clear the DTC. For information on how to clear DTC, See Reading Diagnostic Trouble Codes With Tech 2 Diagnostic Scan Tool (9015-20) or See Reading Diagnostic Trouble Codes With Dr. ZX. (9015-20.) 2. Start the engine. 3. Select the Actuator test from the Tech 2 menu. NOTE: If Tech2 scan tool is not available, See Check and Adjust Fuel Injection Nozzle. (Group 9010-25.) 4. Select the Injection Stop at each injector in the common rail system. 5. Press the OFF soft key to stop the fuel injection in the cylinder one by one, and check the change in engine sound.
Is there any cylinder of which engine vibration and engine sound did not change when it is stopped? YES: Replace the injector in the cylinder of which engine sound did not change when it is stopped. NO: Go to Pre-Injection Stop Test. (Group 9010-15.) – – –1/1 9010 15 21 4 Pre-Injection Stop Test Select Stop Pre-Injection from the Tech 2 menu to perform the test. Is ther any cylinder that vibrates and engine sound did not change when it is stopped? YES: Replace the injector in the cylinder of which engine sound did not change when it is stopped. NO: Go to Injection Pump Coupling Check. – – –1/1 5 Injection Pump Coupling Check Check the coupling of the supply pump for damage. Is there damage?
YES: Repair. NO: Go to Engine Control Module (ECM) Check. – – –1/1 6 Engine Control Module (ECM) Check 1. Check the version of ECM software. 2. Upgrade the software version or replace ECM if necessary. NOTE: EGR valve position learning is required after replacing or rewriting the ECM. See Engine Control Module (ECM) Remove and Install. (Group 9015-20.) Does the engine start? YES: New software repaired ECM. – – –1/1