Page 2669 - Foton Workshop Manual - Sauvana

DIAGNOSIS-ENGINE CONTROL SYSTEM 62-617

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 62
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:ON, 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 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.

Is the result normal?
Yes> To step 6.
No> Repair or change the default parts.

6. Check the fuel injector

(a). Unplug the injector connector.
(b). Unplug the fuel distribution pipes and injector together.
(c). Add the battery voltage of 12 V directly to the injector.
(d). Every injector shall inject the fuel according to the standard flow and have uniform
atomization.
Notice：
When check the injection status of the injectors, if the spray shows “column” instead of
tapered, or the fuel amount the four cylinder injectors spraying differs largely(more than 5
ml) in the same conditions, then it should change the injector. Check whether the injector
nozzle has colloidal substances or not,if it has, it may use cleaning agent to soak and
spray, or it may cause the insufficient of fuel or bad acceleration etc.Clean the injector.
Check the working status of injector again. If it still injects wrongly, change it.

Is the result normal?
Yes> To step 7.
No> Clean the injector. Check the working status of injector again. If it still injects wrongly,
change it.

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