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TROUBLESHOOTING DIESEL FUEL 13A-472 STEP 18. Check compression pressure. • Check compression pressure (Refer to GROUP 11A − On-vehicle Service − Compression Pres- sure Check ). Q: Is the check result normal? YES : Go to Step 19 . NO : Check and repair the engine itself. STEP 19. Check injector itself. • Check injector itself (Refer to ). Q: Is the check result normal? YES : Go to Step 20 . NO : Replace the injector at the failed cylinder. − Precautions Before Service − What The Common Rail Engine Learns ). STEP 20. Check the trouble symptoms. Q: Does trouble symptom persist? YES : Replace the engine-ECU. When the engine- ECU is replaced, write the chassis number − Precautions Before Service − How to Perform Chassis Number Writing ). After replacing the engine-ECU, − Precautions Before Service − What The Common Rail Engine Learns ). After − Emission Control − Diesel Particulate Filter (DPF) System − Forcible DPF Regeneration ). NO : Intermittent malfunction (Refer to GROUP − How to Use Troubleshooting/ Inspection Service Points − How to Cope with Intermittent Malfunction ). Inspection Procedure 10: A Large Amount of Fuel Consumption PROBABLE CAUSES • Improper fuel used • Injector leaking • Failed injector • Fuel injection learning failure • Fuel filter clogged • Failed rail pressure sensor • Failed supply pump (suction control valve) • Failed supply pump correction learning • Failed EGR system operation • Failed turbocharger • Failed thermostat • Failed engine-ECU • Compression pressure low • Air cleaner clogged DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III diagnosis code. Q: Is the diagnosis code set? YES : Inspection chart for diagnosis code (Refer to NO : Go to Step 2 . STEP 2. Check whether other trouble symptoms Q: Are other trouble symptoms occurring? YES : Inspection Chart for Trouble Symptoms ). NO : Go to Step 3 . |