Page 968 - Workshop Manual - Tunland (2017)
P. 968
04-282 DIAGNOSTICS - ENGINE CONTROL SYSTEM
04
Fault phenomenon Possible reasons Refer to
1. Fuel system
2. Fuel injector
3. High pressure fuel pump
Chapter 04 Diagnosis- the
Engine starting difficult or 4. Fuel line motor control system, engine
unable to start (exhaust,
smoke) 5. Intake heater starting difficult or unable to
start (exhaust, smoke)
6. Intake system
7. Exhaust system
8. ECM
1. Turbocharger
2. Intake system
3. Exhaust system
Chapter 04 Diagnosis- the
Low engine output 4. Fuel system motor control system, low
engine output
5. EGR system
6. Fuel
7. ECM
1. Fuel
2. Fuel injector Chapter 04 Diagnosis- the
The engine runs rough or 3. Fuel system motor control system, the
misfiring
4. EGR system engine runs rough or misfiring
5. ECM
1. Fan Chapter 04 Diagnosis- the
The engine fan doesn't work, 2. Air conditioning circuit motor control system, the
works unsteadily or works engine fan doesn't work, work
continuously 3. Fan control circuit unsteadily or misfire
4. ECM continuously
1. Battery
2. Starter or starter circuit
Chapter 04 Diagnosis- the
Slow motor turning motor of 3. Crankshaft motor control system, slow
engine (electric starter motor) 4. Camshaft motor turning motor of engine
(electric starter motor)
5. Timing mechanism
6. ECM
1. Engine oil
Postprocessing diesel 2. Fuel system Chapter 04 Diagnosis- the
particulate filter - excess motor control system,
removal for soot 3. Crankcase ventilation postprocessing diesel
system
