Page 2655 - Foton Workshop Manual - Sauvana

DIAGNOSIS-ENGINE CONTROL SYSTEM 62-603

(d). Check whether the intake pipe has the leakage sound of "hissing " when runs.
(e). Check whether the vacuum tube of the fuel pressure regulator is damaged, dropped
or cracked or not.
(f). Check whether the three-way catalytic converter is blocked or not.
(g). Check whether the seal of the throttle body is leaked or not. 。
(h). Check whether the intake manifold gasket is leaked or not. 62

Is the inspection result normal?
YES> To step 10。
No > Repair or change the default parts.

10. 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 cooling liquid 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 inspection result normal?
YES> To step 11。
No > Clean or change the default parts.

11. Check the oxygen sensor

(a). Check whether the oxygen sensor is installed correctly before and after.
(b). Have the engine idling runs, check the data flow of the diagnostic tool, when
the oxygen sensor reaches the normal temperature the closed-loop control
activating,observe whether the sensor works well or not.

Is the inspection result normal?
YES> To step 12。
No > Repair or change the default parts.

12. Check the cylinder pressure

(a). Perform the test of cylinder compression pressure.

Is the inspection result normal?

YES> To step 14。
No > To step 15。

Page 2655