Двигатели Scania четвёртой серии. Руководство

110

03:04-06

Operational test

The following operational test must be
performed on the EDC system after each
repair.

Erase the fault code memory using a PC
and SD2.

Start the engine. The engine idling speed is
500-700 rpm. The engine idling speed will
automatically increase to 600 rpm if the
coolant temperature is below 20-60

C (the

temperature limit differs between various
engine types).

Put the cruise control switch in the ON
position.

Press RES. The engine speed increases to
the stored hand throttle speed
(500-2000 rpm).

Press RET. The engine speed gradually
decreases.

Press ACC. The engine speed gradually
increases.

Press the switch lightly towards OFF
(spring-loaded position). The engine speed
decreases to idling speed.

Press RES. The engine speed increases to
the stored hand throttle speed.

Press lightly on the clutch pedal. The
engine speed decreases to idling speed.

10 Press RES. The engine speed increases to

the stored hand throttle speed.

11 Press lightly on the brake pedal. The

engine speed decreases to idling speed.

12 Press RES. The engine speed increases to

the stored hand throttle speed.

13 Push down the retarder hand lever. The

engine speed decreases to idling speed.

14 Press RES. The engine speed increases to

the stored hand throttle speed.

15 Depress the exhaust brake floor switch.

The engine speed decreases to idling
speed.

16 Engage a low gear and slowly release the

clutch without touching the accelerator
pedal. Select a gear that gives a road speed
of 5 km/h at engine idling speed.

17 Increase the road speed by pressing ACC.

At 10 km/h, the hand throttle will be
disengaged (the engine returns to idling
speed). If the engine speed exceeds
2000 rpm before the road speed of 10 km/h
is attained, a higher gear must be selected.

18 Depress the accelerator pedal. Check that

the engine speed corresponds to the
position of the accelerator pedal and that
the engine reacts as it should when
depressing the accelerator.

19 Switch off the engine. The EDC lamp

comes on for about 3 seconds.

20 Check the flashing code memory with the

diagnostic button in the vehicle. The lamp
gives one long flash (4 s), i.e. no faults are
stored.

Checking the idling speed

Run the engine until it reaches normal
operating temperature. The idling speed is
reduced to the set value.

Check the idling speed. Generally
speaking, the idling speed should be the
lowest speed at which the engine runs
smoothly. The engine idling speed can be
adjusted between 500 and 700 rpm.

Operational test

Двигатели Scania четвёртой серии. Руководство - часть 168