Isuzu 6WF1-TC and 6WG1-TC workshop manual

WORKSHOP MANUAL C&E - SERIES EMISSION AND ELECTRICAL DIAGNOSIS 6WG1-TC SECTION 6E

NOTICE Before using this Workshop Manual to assist you in performing vehicle service and maintenance operations, it is recommended that you carefully read and thoroughly understand the information contained in Section OA under the headings "GENERAL REPAIR INSTRUCTIONS" and "HOW TO USE THIS MANUAL". All material contained in this Manual is based on the latest product information available at the time of publication. All rights are reserved to make changes at any time without prior notice. Applicable Model : C&E-Series Vehicles This manual is applicable to 1999 year model and later vehicles.

THIS MANUAL INCLUDES THE FOLLOWING SECTIONS SECTION NO. CONTENTS 6E EMISSION AND ELECTRICAL DIAGNOSIS

EMISSION AND ELECTRICAL DIAGNOSIS 6E-1 SECTION 6E EMISSION AND ELECTRICAL DIAGNOSIS CAUTION: When fasteners are removed, always reinstall them at the same location from which they were removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct part number fastener is not available, a fastener of equal size and strength for (stronger) may be used. Fasteners that are not reused, and those requiring thread locking compound, will be caned out The correct torque values must be used when installing fasteners that require it. If the above conditions are not followed, parts or system damage could result. CONTENTS PAGE GENERAL DESCRIPTION................................................................................................. 6E- 4 NOTES FOR WORKING ON ELECTRICAL ITEMS ....................................................... 6E- 4 SYMBOLS AND ABBREVIATIONS ................................................................................ 6E- 10 PARTS FOR ELECTRICAL CIRCUIT ............................................................................. 6E- 12 BRIEF EXPLANATION OF EMISSION AND ELECTRICAL CONTROL SYSTEM ......... 6E- 14 1. EC GOVERNOR (ELECTRICAL CONTROL GOVERNOR) .................................... 6E- 14 2. TICS (TIMING AND INJECTION CONTROL SYSTEM) .......................................... 6E- 15 3. IVES (lSUZU VARIABLE ELECTRIC AND ECONOMY SWIRL) ............................ 6E- 16 4. CCS (COMBINED CHARGING SYSTEM) .............................................................. 6E- 17 5. ECU SYSTEM WIRING DIAGRAM ......................................................................... 6E- 18 6. LOCATION OF SENSOR AND SWITCH ................................................................ 6E- 19 7. HARNESS LOCATION ............................................................................................ 6E- 21 8. ENGINE CONTROL UNIT (ECU) ............................................................................ 6E- 22 9. CHART OF ECU INPUT/OUTPUT........................................................................... 6E- 23 10. LIMP HOME CONTROL .......................................................................................... 6E- 27 11. THE METHOD OF SHIFT OVER TO IDLING CONTROL ....................................... 6E- 28 12. CONFIRMATION RETURN CONDITION FOR EMERGENCY ENGINE STOP LEVER ..................................................................................................................... 6E- 29 13. CAUTION TAKEN IN REPLACING ENGINE CONTROL UNIT (ECU) ................... 6E- 30 14. METHOD TO FIT OUANTITY ADJUSTING RESISTANCE .................................... 6E- 31 15. TROUBLESHOOTING ............................................................................................ 6E- 33 16. DIAGNOSIS TROUBLE CODE LIST....................................................................... 6E- 39 CONNECTOR INSPECTING PROCEDURE ........................................................... 6E- 47

6E-2 EMISSION AND ELECTRICAL DIAGNOSIS 1. ENGINE HUNTING ............................................................................................ 6E- 48 2. STARTUP FAILURE .......................................................................................... 6E- 49 3. WHITE SMOKE (EXCESSIVE) .......................................................................... 6E- 51 4. BLACK SMOKE (EXCESSIVE) ......................................................................... 6E- 53 5. LACK OF POWER ............................................................................................. 6E- 55 6. SURGING. HESITATION ................................................................................... 6E- 57 7. ENGINE STALL ................................................................................................. 6E- 59 8. ENGINE DOES NOT STOP ............................................................................... 6E- 67 9. IDLE CONTROL ERROR................................................................................... 6E- 69 10. HIGH IDLE ENGINE SPEED ............................................................................. 6E- 71 11. PTO CONTROL ERROR ................................................................................... 6E- 72 12. EXHAUST BRAKE MALFUNCTION.................................................................. 6E- 74 13. RETARDER MALFUNCTION............................................................................. 6E- 77 14. TACHOMETER ABNORMALITY ....................................................................... 6E- 82 15. W/L LAMP (DIAG LAMP) MALFUNCTION........................................................ 6E- 83 DTC-33 MEMORY CIRCUIT (RAM) ERROR ....................................................... 6E- 87 DTC-543 ABNORMALLY HIGH REVOLUTION ERROR....................................... 6E- 88 DTC-571 ENGINE REVERSING ERROR .............................................................. 6E- 89 DTC-11 GOVERNOR SERVO SYSTEM ERROR ................................................ 6E- 90 DTC-10 RACK SENSOR ERROR........................................................................ 6E- 97 DTC-29 PRESTROKE SERVO SYSTEM ERROR............................................... 6E-103 DTC-291 PRESTROKE SENSOR ERROR............................................................ 6E-112 DTC-292 PRESTROKE LEANING ERROR ........................................................... 6E-118 DTC-15 N-TDC SENSOR ERROR ....................................................................... 6E-124 DTC-14 BACKUP N SENSOR ERROR ............................................................... 6E-130 DTC-24 ACCELERATION SENSOR ERROR ...................................................... 6E-136 DTC-240 ACCELERATION SYSTEM ERROR ...................................................... 6E-151 DTC-241 ACCELERATION SWITCH OFF ERROR............................................... 6E-161 DTC-242 ACCELERATION SWITCH ON ERROR ................................................ 6E-171 DTC-28 ALL SPEED ACCELERATION SENSOR ERROR ................................. 6E-181 DTC-25 VEHICLE SPEED SENSOR ERROR ..................................................... 6E-192 DTC-23 WATER TEMPERATURE SENSOR ERROR ......................................... 6E-203 DTC-211 FUEL TEMPERATURE SENSOR ERROR............................................. 6E-209 DTC-22 ATMOSPHERIC TEMPERATURE SENSOR ERROR............................ 6E-213 DTC-71 ATMOSPHERIC PRESSURE SENSOR ERROR ................................... 6E-218

Isuzu 6WF1-TC and 6WG1-TC workshop manual

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