Page 972 - Workshop Manual - Tunland (2017)
P. 972
04-286 DIAGNOSTICS - ENGINE CONTROL SYSTEM
04
Fault phenomenon Possible reasons Refer to
1. Vacuum system Chapter 04 Diagnosis- the
Excessive noise of vacuum motor control system,
pump 2. Vacuum pump excessive noise of vacuum
pump
1. Intake system
2. Exhaust system
3. Turbocharger system Chapter 04 Diagnosis- the
Intake manifold pressure motor control system, intake
(boost) is below normal 4. EGR system manifold pressure (boost) is
5. Intake manifold (boost) below normal
pressure sensor or circuit
6. ECM
1. Exhaust system
2. Turbocharger system
3. Intake heater
4. Intake manifold (boost) Chapter 04 Diagnosis- the
Intake manifold air pressure sensor or circuit motor control system, intake
temperature is higher than manifold air temperature is
5. Radiator
technical specification value higher than technical
6. Fan specification value
7. EGR system
8. Cooling system
9. ECM
1. Postprocessing system
2. Intake system
3. Fuel system
4. Intake manifold pressure
temperature sensor Chapter 04 Diagnosis- the
Black smoke - plenty motor control system, back
5. Turbocharger smoke - plenty
6. Crankcase ventilation
system
7. Injector
8. EGR system
1. The exterior or interior of
an engine or support
Chapter 04 Diagnosis- the
Excessive vibration 2. Engine mounting motor control system,
3. Body excessive vibration
4. Chassis
