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TROUBLESHOOTING DIESEL FUEL 13A-480 YES : Go to Step 12 . NO : Proceed to the inspection procedure by ). STEP 12. M.U.T.-III actuator test. • Refer to Actuator Test Reference Table a. Item 19: Suction control valve Q: Is the check result normal? YES : Go to Step 13 . NO : Replace the suction control valve. After − Precautions Before Service − What The Common Rail Engine Learns ). STEP 13. Check suction control valve itself. • Check suction control value itself (Refer to ). Q: Is the check result normal? YES : Go to Step 14 . NO : Replace the suction control valve. After − Precautions Before Service − What The Common Rail Engine Learns ). STEP 14. M.U.T.-III data list. • Refer to Data List Reference Table . a. Item 63: Rail pressure sensor Q: Are the check results normal? YES : Go to Step 16 . NO : Go to Step 15 . STEP 15. Replace the rail pressure sensor. • Replace the common-rail assembly. Q: Does trouble symptom persist? YES : Go to Step 18 . NO : The procedure is complete. STEP 16. 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 17 . NO : Check and repair the engine itself. STEP 17. Check injector itself. • Check injector itself (Refer to ). Q: Is the check result normal? YES : Go to Step 18 . NO : Replace the injector at the failed cylinder. − Precautions Before Service − What The Common Rail Engine Learns ). STEP 18. 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 14: Battery rundown <Euro5> COMMENT ON TROUBLE SYMPTOM • Failure is possibly caused by failed alternator, failed generation control circuit or other faults. PROBABLE CAUSES • Failed battery • Open/short circuit or harness damage in alterna- tor L terminal circuit • Short circuit in alternator G terminal |