Page 235 - Foton Workshop Manual - Aumark (BJ1099)

ENGINE CONTROL SYSTEM - ENGINE CONTROL SYSTEM 11-9

8. Cooling fan control
• The vehicle is equipped with the electric double speed engine cooling fan.
• Electric fan control function: ECM determines whether to turn on each fan
according to the basis that whether the temperature of the coolant temperature
of the engine meets the condition starting the air conditioner, so as to reduce the
internal power consumption of the engine.
9. Self- diagnosis
• Self-diagnosis of system malfunction is an essential function of engine control
system. When one or several parts in the system work abnormally, the system
will remind the vehicle user to perform necessary inspection and maintenance by 11
lighting up MIL in a timely manner. When the malfunction occurs, the system may
use temporary emergency plan to control the operation of the engine, so as to
ensure that the user can drive the vehicle for maintenance.
• When the abnormality of an abnormal certain sensor and actuator is detected, the
engine MIL lights up so as to remind the vehicle user.
• RAM data related to the sensor and actuator in the ECM can be read through
trouble diagnosis device. In addition, in some cases, the actuator can be driven
by force.

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