Page 966 - Workshop Manual - Tunland (2017)
P. 966
04-280 DIAGNOSTICS - ENGINE CONTROL SYSTEM
04
Fault phenomenon Possible reasons Refer to
5. Radiator
6. Thermostat
7. Cooling system
8. Coolant temperature
sensor
9. Cooling system
10. Water pump
1. Key switch or key switch Chapter 04 Diagnosis- the
The engine can not stop circuit motor control system, engine
2. ECM can not stop
1. Injector
Chapter 04 Diagnosis- the
In low idle or high idle speed, 2. Fuel system motor control system, in low
the engine is unstable idling 3. Intake system idle or high idle speed, the
engine is unstable idling
4. ECM
1. Accelerator pedal
2. Injector
The engine decelerates 3. Clutch Chapter 04 Diagnosis- the
motor control system, engine
slowly 4. ECM
decelerates slowly
5. Gearbox
6. Electronic throttle valve
1. Engine accessory belt
2. Injector
3. Crankshaft or main bearing
4. Connecting rod bearing
5. Turbocharger
6. Overhead mechanism
Chapter 04 Diagnosis- the
7. Piston or piston ring
Excessive engine noise motor control system,
8. Timing chain excessive engine noise
9. Idler wheel or tensioner
wheel
10. Connecting rod
11. Burning knock
12. Injection timing
13. Piston pin
