|
|
3. CHECK POWER AND GROUNDS Refer to the symptom list and perform the Checking the ECM Power and Ground test. Were any problem found with the ECM powers and grounds? Yes >> Repair as necessary. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go To 4 4. CHECKING FUEL PRESSURE NOTE: This test requires two people. One person to test drive the vehicle while a technician observes the NOTE: The Fuel Pressure reading should follow (trail) closely to the Fuel Pressure Desired/Setpoint reading. Does the Fuel Pressure reading follow closely to the Fuel Pressure Desired/Setpoint reading? Yes >> Go To 5 No >> Go To 7 5. SCAN TOOL TESTS With the scan tool, select Engine, System Tests and perform the following tests: - Injector Fuel Correction Test. - Cylinder Balance test. - Compression Test. Were any problems found? Yes >> Diagnose and/or repair as necessary. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go To 6 6. FUEL SYSTEM CONTAMINATION NOTE: Mixing any other fuels such as gasoline or kerosine can cause this symptom to occur. WARNING: HIGH-PRESSURE FUEL LINES DELIVER DIESEL FUEL UNDER EXTREME PRESSURE FROM THE WARNING: FUEL UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE SKIN CAUSING PERSONAL Is the fuel contaminated? Yes >> Repair as necessary in accordance with the Service Information. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Test Complete. 9 - 686 ENGINE DIESEL DIAG KJ |