Page 2673 - Foton Workshop Manual - Sauvana

DIAGNOSIS-ENGINE CONTROL SYSTEM 62-621

3. Check the position of the throttle.

(a). Use a diagnostic tool to check whether the throttle is normal or not.
(b). Check whether the throttle opening changes normally or not when steps the
accelerator pedal.
62
Is the result normal?
Yes>To step 4.
No> Repair or change the default parts.

4. Check the cooling liquid temperature sensor and inlet pressure temperature sensor

(a). Check whether the inlet pressure temperature sensor assembled right or not.
(b). Dismantle the inlet pressure temperature sensor.
(c). Check whether the sensing hole is blocked or not, and whether the resistance
between the terminals is in line with the standard or not.
(d). Check whether the temperature sensor is dirty or not.
(e). Ignition switch: Turn on the ignition switch, read the data flow of the inlet pressure
temperature sensor and the cooling liquid temperature sensor shown on the
diagnostic tool.

Is the result normal?
Yes>To step 5.
No> Clean and change the default parts.

5. Check pressure of the fuel system

(a). Check pressure of the fuel system.

Is the result normal?
Yes>To step 6.
No> Repair or change the fuel system parts or circuits if the fuel pressure is lower than 400
kPa,go to the step 6.

6. Check the fuel supply of the fuel system

(a). Check whether it has leakage or block in the oil inlet or not.
(b). Check whether the fuel filter is blocked or not.

Is the result normal?
Yes>To step 7.
No> Clean and change the default parts.

Page 2673