Doosan G643E - Page 8

G643(E) Service Manual Index 6
N2001 Regulator Disassembly Steps: .. 224
N2001 Disassembled Service .............. 226
Chapter 7. BASIC TROUBLESHOOTING
Preliminary Checks.......................................... 227
Before Starting............................................ 227
Visual/Physical check.................................. 227
Basic Troubleshooting Guide ......................... 228
Customer Problem Analysis Sheet .............. 228
Basic Inspection Procedure......................... 229
Connector Inspection Procedure ................. 230
Basic Troubleshooting .................................... 234
Intermittents................................................ 234
Corrective Action......................................... 234
Surges and/or Stumbles.............................. 235
Engine Cranking but Will Not Start / Difficult to
Start ........................................................ 236
Engine Cranking but Will Not Start / Difficult to
Start (cont’d.)........................................... 237
Lack of Power, Slow to Respond / Poor High
Speed Performance / Hesitation During
Acceleration ............................................ 238
Detonation / Spark Knock............................ 240
Backfire ...................................................... 241
Dieseling, Run-on ....................................... 241
Rough, Unstable, Incorrect Idle, or Stalling.. 242
Cuts Out, Misses......................................... 244
Poor Fuel Economy / Excessive Fuel
Consumption / LPG Exhaust Smell .......... 245
High Idle Speed .......................................... 246
Excessive Exhaust Emissions or Odors....... 247
Diagnostic Aids for Rich / Lean Operation ... 248
Chart T-1 Restricted Exhaust System Check ... 249
Chapter 8. ADVANCED DIAGNOSTICS
Reading Diagnostic Fault Codes .....................250
Displaying Fault Codes (DFC) from SECM
Memory .............................................................250
Clearing Fault (DFC) Codes .............................250
Fault Action Descriptions ................................251
Fault List Definitions ........................................251
Appendix
LPG And LPG Fuel Tanks ................................252
Regulatory Compliance....................................256
Special Conditions for Safe Use......................256
Abbreviations ...................................................257