|
Trouble Code
|
Information Sensor
Cause of Fault
|
Remedy in F0:DATA LIST
No.
|
Trouble Code Storage
when
|
|
63
|
ETC-THR. MOTOR OPEN
CIRCUIT
|
Actuator Test No. 01
|
Test procedure:
In normal operation, the ETC throttle valve follows the
standard throttle valve. To be able to carry out a check of the ETC throttle
valve during normal operation, the following test procedure is carried out
after each "ignition ON" and each time the idle speed exceeds 600
rpm:
If the accelerator pedal is in idle stop position and the
vehicle, with engine running (engine temperature > 0 °C/32 °F), is moving
at a speed > 4 km/h (3 mph), the ETC throttle valve closes and then
follows again. This operation is repeated once for each "ignition
ON" to check that the procedure is carried out correctly.
|
|
|
|
|
· To check whether the coupling rod
between the ETC motor unit and the throttle valve housing is functioning
properly, when the test procedure described above is completed with all
boundary conditions fulfilled, the ETC servo motor is switched powerless for
approx. 250 ms. After this time has elapsed, the ETC throttle valve must have
been opened by the return spring by at least 10°. If this is not the case, the
fault is set (mechanical fault).
|
|
|
|
|
On fault recognition, the ETC function is switched off and
the ETC telltale is activated
or
· If the control unit recognizes a
considerable difference between the nominal position and the actual position
of the present ETC throttle valve position, an attempt is made to correct
this by powering the ETC servo motor appropriately. Parallel to this, the
deviation of the nominal and actual positions is integrated at an interval of
approx. 130 ms until a threshhold value is exceeded. When the threshhold
value is exceeded, the fault code is stored (ETC servo motor circuit open).
On fault recognition, the ETC function is switched off and
the ETC telltale is activated.
|
