Page 61 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 7

Instruction of system part IN

S/N Part QTY Function
DI
Optimize the control system according to the signal provided
1 Engine ECM 1
by the sensor to adapt to the working condition of engine
To measure the engine speed and determine the engine phase. EG
2 Camshaft position sensor 1 The camshaft signal sensor and crankshaft position sensor
provide correct #1 cylinder top dead center signal for ECM. TR
To measure the engine speed. ECM calculates the engine
3 Crankshaft position sensor 1
speed as per this signal.
AX
Measure the engine coolant temperature to determine
4 Coolant temperature sensor 1
the working condition of engine
FR
5 Injector Inject the fuel according to the signal from ECM

Control the oil supply quantity from the oil pump plunger to
ST
the rail so as to meet the set pressure of common rail system
6 Metering cell 1
and form a close loop control for rail pressure with the fuel
BR
pressure sensor

To provide the transient common-rail fuel pressure for ECM to
BW
7 Fuel pressure sensor 1 realize the closed loop control of ECM for common rail
pressure.

Sense the vehicle at different altitude and monitor the pressure EL
8 Atmospheric pressure sensor 1 outside of vehicle to adjust the injection quantity and
the working of engine

9 High pressure oil pump 1 Provide high pressure fuel to the high pressure oil rail

10 High pressure oil rail 1 Keep the internal fuel at high pressure
At cold weather, heat the gas in cylinder to start the engine
11 Pre-heater 1
easily.

Intake manifold Measure the air temperature and flow going into the cylinder
12 1
pressure/temperature sensor to control injection

Measure the water quantity in the filter and remind the driver
13 Fuel moisture sensor 1
to discharge water

Measure the engine oil pressure. Remind the driver to prevent
14 Engine oil pressure sensor 1
damaging the engine

15 Fuel pre-filter 1 Remove large impurities out of fuel to main the fuel quality.

16 Fuel primary filter 1 Filter out the water and small impurities in the fuel

Filter out the impurities in the fuel to protect the injector and
17 Fuel filter 1
other parts

18 Fuel tank 1 Reservoir fuel

DI-007