Page 2639 - Foton Workshop Manual - Sauvana

DIAGNOSIS-ENGINE CONTROL SYSTEM 62-587
FAULT LISTS

Notice：
If the default wasn’t identified inthe DTC(diagnosis of default code) check, and the
reasons causing the default also wasn’t indentified in the basic check, then it should
troubleshoot as the following items, and then go to the relevant troubleshooting page to do
it. 62

Fault phenomenon Possible reasons Refer to

1. CAN bus circuit Chapter 62 Diagnosis-the motor
The diagnostic tool control system,the diagnostic
cannot communicate 2. CAN bus circuit tool cannot communicate withthe
withthe ECU 3. ECU ECU

1. spark plug
2. Inlet system

3. Fuel temperature
Chapter 62 Diagnosis-the motor
The starter rotates but 4. Coolant temperature sensor control system,the starter rotates
the motorcan’t start 5. Air flowmeter
but the motor can’t start.
6. Fuel injector

7. Ignition timing
8. The fuel quality

1. Inlet system

The cold car starts 2. Fuel injector Chapter 62 Diagnosis-the motor
difficult ly, the car 3. Coolant temperature sensor control system,the cold car starts
istrembled 4. Air flowmeter difficultly, the car is trembled

5. Fuel temperature
1. Ignition system

2. Idle speed motor Chapter 62 Diagnosis-the motor
Unst able idling 3. Oxygen sensor control system,unstable idling
(fluctuated)
4. Inlet system (fluctuated)
5.Fuel injector

1. Idle speed motor Chapter 62 Diagnosis-the motor
High idle speed (idle 2. Throttle body control system,high idle(idle
speed is notwithin the speed is not within the specified
specified value) 3. vacuum line
4. ECU value )

Page 2639