Page 504 - Foton Workshop Manual - Tunland (AT)
P. 504
04-358 DIAGNOSTICS - ENGINE CONTROL SYSTEM
Fault phenomenon Possible reasons Refer to
1. Engine oil Chapter 04 Diagnosis- the
Excessive engine noise -
motor control system,
main bearing 2. Crankshaft or main bearing excessive engine noise
1. Overhead mechanism
04
2. Injector
Excessive engine noise - Chapter 04 Diagnosis- the
3. Piston or piston ring motor control system,
piston excessive engine noise
4. Connecting rod
5. Piston pin
1. Intake system
Excessive engine noise - 2. Intake pipe Chapter 04 Diagnosis- the
motor control system,
turbocharger 3. Turbocharger
excessive engine noise
4. Exhaust pipe
1. Fuel
2. Overhead mechanism
Excessive engine noise - Chapter 04 Diagnosis- the
3. Injector motor control system,
burning knock excessive engine noise
4. Injection timing
5. Piston
1. Engine oil
2. Connecting rod and Chapter 04 Diagnosis- the
Excessive engine noise - connecting rod bearing motor control system,
connecting rod
3. Crankshaft journal excessive engine noise
4. Piston pin
1. Engine accessory belt Chapter 04 Diagnosis- the
Excessive engine noise - motor control system,
driving belt 2. Idler wheel or tensioner
wheel excessive engine noise
1. Battery
2. Starter or starter circuit
Chapter 04 Diagnosis- the
The engine can not be motor 3. Crankshaft motor control system, the
jigger- (electric starter motor) 4. Camshaft engine can not be motor
jigger - (electric starter motor)
5. Timing mechanism
6. ECM
1. Fuel system Chapter 04 Diagnosis- the
Engine starting difficult or motor control system, engine
unable to start (exhaust, 2. Fuel injector starting difficult or unable to
smoke)
3. High pressure fuel pump start (exhaust, smoke)
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